@misc{SchneiderGerkeMaureretal., author = {Schneider, Anna and Gerke, Horst H. and Maurer, Thomas and Seifert, Stefan and Nenov, Rossen and H{\"u}ttl, Reinhard F.}, title = {Evaluation of remotely-sensed DEMs and modification based on plausibility rules and initial sediment budgets of an artificially-created catchment}, series = {Earth Surface Processes and Landforms}, volume = {37}, journal = {Earth Surface Processes and Landforms}, number = {7}, issn = {1096-9837}, pages = {708 -- 725}, language = {en} } @misc{MaurerGerke, author = {Maurer, Thomas and Gerke, Horst H.}, title = {Modelling aeolian sediment transport during initial soil development on an artificial catchment using WEPS and aerial images}, series = {Soil \& Tillage Research}, volume = {117}, journal = {Soil \& Tillage Research}, issn = {0167-1987}, pages = {148 -- 162}, language = {en} } @misc{MaurerSchneiderGerke, author = {Maurer, Thomas and Schneider, Anna and Gerke, Horst H.}, title = {Scenario-Based Three-Dimensional Distributed Sediment Structures for a Constructed Hydrological Catchment}, series = {Vadose zone journal}, volume = {12}, journal = {Vadose zone journal}, number = {4}, issn = {1539-1663}, doi = {10.2136/vzj2013.02.0047}, abstract = {Many processes in a developing catchment can only be fully understood if the spatial heterogeneity is adequately described. Process-based modeling allows reproducing specific key structural elements of catchments. Constructed catchments are ideal test objects because of the well-known spatial conditions. In our study, we (i) modeled the entire process chain of catchment construction, (ii) established a consistent sediment mass/ volume balance between the excavated outcrop and the generated catchment model, and (iii) provided consistent three-dimensional distributions of texture and bulk density for deriving soil hydraulic properties. Data are from the 6 ha H{\"u}hnerwasser catchment (Chicken Creek, Lower Lusatia, Germany), which was constructed from overburden sediments in an open-cast lignite mine. Uncertainty about the parent material origin was captured in a multiscenario approach based on a geological model of the outcrop site and the simulation of excavation procedures. Generated distributions are incorporated in a gridded threedimensional volume model (GOCAD), and results were evaluated by semivariogram analysis and by quantifying point-to-point deviations. Filling and compaction are modeled based on three-dimensional volume analysis and mass balances of dumped sediments. Heterogeneities reflect both the batch-wise sediment variation and the succession of excavated geological units. The scale of the generated spatial models can be adjusted for three-dimensional hydrological catchment modeling while three-dimensional sediment mass balances can be used for analyzing soil and ecosystem development processes.}, language = {en} } @misc{GerkeMaurerSchneider, author = {Gerke, Horst H. and Maurer, Thomas and Schneider, Anna}, title = {A Three-Dimensional Structure and Process Model for Integrated Hydro-Geo-Pedologic Analysis of a Constructed Hydrological Catchment}, series = {Vadose zone journal}, volume = {12}, journal = {Vadose zone journal}, number = {4}, issn = {1539-1663}, doi = {10.2136/vzj2013.02.0040}, abstract = {A structure model describes the boundary geometries and the three-dimensional solid phase distributions of the catchment. In contrast to an established ecosystem, feedback relations can be assumed for an initial geosystem between the development of spatial structures and the water and element fluxes. The objective was to develop a hydrological catchment model as a three-dimensional spatial database of the solid phase that allows an integrative analysis, a periodical mass balance, and the generation of distributed model parameters for the developing system. Data were from the constructed catchment "Chicken Creek." The initial texture and bulk density distributions were generated by imitating sediment dumping, segregation, and compaction. Boundary geometries and changes in surface topography due to erosion and sedimentation processes were quantified on the basis of digital elevation models (DEMs) derived from aerial photographs. The catchment was visualized with the three-dimensional software GoCad; the "emergence" of the water table and other structures (e.g., soil horizons, root zone) could be spatially assigned and quantified to identify regions with specific processes. A combination of three-dimensional catchment with time-dependent two-dimensional surface models allowed generating the development of spatially distributed erosion-deposition patterns that formed new initial surfaces. The three-dimensional distributed solid phase structure of the catchment allowed for a more direct comparison with observations using minimal invasive methods. The mass balance of the solids could be related with pedologic development and transfer to other geopedologic systems achieved by adapting sediment transport and deposition in the descriptions of the model. This model may help improve the integrative analysis of hydrological catchments.}, language = {en} } @misc{SchneiderGerkeMaureretal., author = {Schneider, Anna and Gerke, Horst H. and Maurer, Thomas and Nenov, Rossen}, title = {Initial hydro-geomorphic development and rill network evolution in an artificial catchment}, series = {Earth Surface Processes and Landforms}, volume = {38}, journal = {Earth Surface Processes and Landforms}, number = {13}, issn = {1096-9837}, doi = {10.1002/esp.3384}, pages = {1496 -- 1512}, abstract = {The formation of erosion rills and gullies is a critical step in land surface development, but possibilities to study initial unaffected surface development under natural conditions and with well-defined initial and boundary conditions are rare. The objective of this study was to characterize rill network development from 'point zero' in the artificially-created catchment 'H{\"u}hnerwasser'. To ensure unaffected development, the study was largely restricted to the analysis of remotely-sensed data. We analyzed a series of photogrammetry-based digital elevation models (DEMs) for 10 points in time, over a period of five years and beginning with the initial state. The evolving erosion rill network was quantitatively described based on mapping from aerial photographs. DEMs and rill network maps were combined to specifically analyze the development of morphometry for different parts of the network and to characterize energy dissipation and connectivity. The restriction to remote-sensing data did not allow for analyzing specific processes governing rill network development, nevertheless, two major development phases could be characterized. We observed a phase of growth of the rill network along with variations in drainage patterns during the first two years of development and a subsequent phase of reduction of its area along with comparably stable patterns. Region-specific analysis of morphometry indicates that, besides effects of changing sediment characteristics and vegetation cover development, locally evolving hydro-geomorphic feedback cycles influenced this development. Results show an increasing similarity of overall statistical characteristics (e.g. drainage density) for two parts of the catchment, but a persistent influence of initial conditions on specific rill geometry. The observed development towards higher orderliness and increased connectivity is consistent with experiments and concepts on drainage network evolution across scales; however, we did not observe major influences of rill piracy and cross grading or a reduction of energy dissipation with network development.}, language = {en} } @misc{NgoGerkeBadorreck, author = {Ngo, Viet V. and Gerke, Horst H. and Badorreck, Annika}, title = {Estimability Analysis for Optimization of Hysteretic Soil Hydraulic Parameters Using Data of a Field Irrigation Experiment}, series = {Transport in Porous Media}, volume = {103}, journal = {Transport in Porous Media}, number = {3}, doi = {10.1007/s11242-014-0315-6}, pages = {535 -- 562}, abstract = {To improve the quality of parameter optimization, estimability analysis has been proposed as the first step before inverse modeling. When using field data of irrigation experiments for the determination of soil hydraulic parameters, wetting and drying processes may complicate optimization. The objectives of this study were to compare estimability analysis and inverse optimization of the soil hydraulic parameters in the models with and without considering hysteresis of the soil water retention function. Soil water pressure head data of a field irrigation experiment were used. The one-dimensional vertical water movement in variably saturated soil was described with the Richards equation using the HYDRUS-1D code. Estimability of the unimodal van Genuchten-Mualem hydraulic model parameters as well as of the hysteretic parameter model of Parker and Lenhard was classified according to a sensitivity coefficient matrix. The matrix was obtained by sequentially calculating effects of initial parameter variations on changes in the simulated pressure head values.Optimization was carried out by means of the Levenberg-Marquardt method implemented in the HYDRUS-1D code. The parameters α, Ks, θs, and n in the nonhysteretic model were found sensitive and parameter θs strongly correlated with parameter n. When assuming hysteresis, the estimability was decreased with soil depth for Ks and αd , and increased for θs and n. Among the shape parameters, αw was the most estimable. The hysteretic model could approximate the pressure heads in the soil by considering parameters from wetting and drying periods separately as initial estimates. The inverse optimization could be carried out more efficiently with most estimable parameters. Despite the remaining weaknesses of the local optimization algorithm and the inflexibility of the unimodal van Genuchten model, the results suggested that estimability analysis could be considered as a guidance to better define the optimization scenarios and then improved the determination of soil hydraulic parameters.}, language = {en} } @inproceedings{BadorreckGerke, author = {Badorreck, Annika and Gerke, Horst H.}, title = {Initial soil and ecosystem development in an artificial catchment: Visualization of soil structure and water flow}, series = {9th International Symposium on Ecosystem Behavior BIOGEOMON, Litomysl, Czech Republic, August 20-24, 2017}, booktitle = {9th International Symposium on Ecosystem Behavior BIOGEOMON, Litomysl, Czech Republic, August 20-24, 2017}, editor = {Nov{\´a}k, Martin and Kr{\´a}m, Pavel and Step{\´a}nov{\´a}, Mark{\´e}ta}, publisher = {Czech Geological Survey}, address = {Prague}, pages = {S. 355}, abstract = {An artificial catchment was constructed to study initial soil and ecosystem development. Our research site is the hydrologic catchment area "Chicken Creek", 20 km south of the city Cottbus (Germany), which is left to undirected succession. The approximately 6-ha catchment area was built in 2005 of coarse-textured quaternary sediments and forms a back- and foot-slope that flattens out to a pond. A clay liner, 2-3 m in thickness, seals the catchment at the bottom. The initial "soil" layer consists of sandy quaternary sediments, approximately 2-3 m in thickness, that overlay the clay liner. The sediments of the artificial system are in the very initial stage of soil formation. As a key process, the pore structure dynamics in the soil at the surface strongly influences erosion, infiltration, matter dynamics, and vegetation establishment. Little is known, however, about early macropore formation. This presentation focuses on observations of the general development of the catchment, with emphasis on soil structure modifications, such as soil surface crusts, structure formation from ground beetles, moss vegetation and its effect on water flow. We visualized the soil structure and flow patterns using a combination of neutron radiography, neutron tomography (NT) and X-ray computed tomography (CT) experiments. All techniques were used to describe preferential pathways as a soil structure with CT and the process of preferential flow of water with NT. For the first time, neutron radiation was applied on undisturbed soil cores to visualize water distributions in natural soils on three examples containing heterogeneities of different origin. Our observations demonstrate relatively high abiotic and biotic dynamics of soil pore structure in the soil surface even during the very early development stages of the catchment. The structure formation influences runoff and infiltration by forming sealing layers or preferential flow paths, due to biotic activity.}, language = {en} } @inproceedings{MaurerBrueckHinzetal., author = {Maurer, Thomas and Br{\"u}ck, Yasemine and Hinz, Christoph and Gerke, Horst H.}, title = {Modeling 3D soil and sediment distributions for assessing catchment structure and hydrological feedbacks}, series = {European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015}, booktitle = {European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @misc{MaurerCaviedesVoulliemeGerkeetal., author = {Maurer, Thomas and Caviedes-Voulli{\`e}me, Daniel and Gerke, Horst H. and Hinz, Christoph}, title = {A 3D-spatial approach for modeling soil hydraulic property distributions on the artificial Huehnerwasser catchment}, series = {Geophysical Research Abstracts}, volume = {21}, journal = {Geophysical Research Abstracts}, pages = {1}, abstract = {Knowledge of catchment 3D spatial heterogeneity is crucial for the assessment and modeling of eco-hydrological processes. Especially during the initial development phase of a hydro-geo-system, the primary structural properties have the potential to determine further development pathways. Small-scale heterogeneity (cm to m scale) may have significant effects on processes on larger spatial scales, but is difficult to measure and quantify. The H{\"u}hnerwasser (Chicken Creek) catchment offers the unique opportunity to study early ecosystem development within an initial structural setup that is well-known, from the plot up to the catchment scale. Based on information on the open-cast mining technology, catchment boundaries and sediment properties, we developed a structure generator program for the process-based modeling of specific dumping structures and sediment property distributions on the catchment. The structure generator reproduces the trajectories of spoil ridges and can be conditioned to reproduce actual sediment distributions according to remote sensing and soil sampling data. Alternatively, sediment distribution scenarios can be generated based on geological data from the excavation site, or can be distributed stochastically. Using pedotransfer functions, the effective hydraulic van-Genuchten parameters are then calculated from sediment texture and bulk density. The main application of the 3D catchment model is to provide detailed 3D-distributed flow domain information for hydrological flow modeling. Observation data are available from catchment monitoring are available for determining the boundary conditions (e.g., precipitation), and the calibration / validation of the model (catchment discharge, ground water). The analysis of multiple sediment distribution scenarios allows to evaluate the effect of initial conditions on hydrological behavior development. Generally, the modeling approach can be used to pinpoint the influx of specific soil structural features on ecohydrological processes across spatial scales.}, language = {en} } @incollection{GerkeGruenewaldBiemeltetal., author = {Gerke, Horst H. and Gr{\"u}newald, Uwe and Biemelt, Detlef and Badorreck, Annika and Bartl, Steffen}, title = {Project A4 - Development and interactions of flow paths on the surface and in the soil}, series = {Structures and processes of the initial ecosystem development phase in an artificial water catchment (Final report CRC/TR 38)}, booktitle = {Structures and processes of the initial ecosystem development phase in an artificial water catchment (Final report CRC/TR 38)}, editor = {H{\"u}ttl, Reinhard F. and K{\"o}gel-Knabner, Ingrid and Schulin, Rainer and Gerwin, Werner}, publisher = {BTU, Forschungszentrum Landschaftsentwicklung und Bergbaulandschaften (FZLB)}, address = {Cottbus}, pages = {37 -- 44}, language = {en} } @inproceedings{BiemeltBartlGerkeetal., author = {Biemelt, Detlef and Bartl, Steffen and Gerke, Horst H. and Badorreck, Annika and Schapp, Andrea}, title = {Analyse von Wechselwirkungen zwischen Infiltration und Abfluss in Abh{\"a}ngigkeit von Oberfl{\"a}chenstrukturen mit einem komplexen Beregnungsexperiment}, series = {B{\"o}den - eine endliche Ressource, 5. - 13. September 2009, Bonn, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft}, booktitle = {B{\"o}den - eine endliche Ressource, 5. - 13. September 2009, Bonn, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft}, publisher = {Deutsche Bodenkundliche Gesellschaft (Selbstverlag)}, address = {Bonn}, language = {de} } @inproceedings{MaurerGerke, author = {Maurer, Thomas and Gerke, Horst H.}, title = {Modelling of a aeolian sediment translocation on the soil surface of a small area using WEPS}, series = {EGU General Assembly 2008, Wien}, booktitle = {EGU General Assembly 2008, Wien}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{SchneiderMaurerGerke, author = {Schneider, Anna and Maurer, Thomas and Gerke, Horst H.}, title = {Bilanzierung der Sedimentmassen eines k{\"u}nstlichen Wassereinzugsgebiets mit einem 3D-Strukturmodell}, series = {B{\"o}den - eine endliche Ressource, 5. - 13. September 2009, Bonn, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft}, booktitle = {B{\"o}den - eine endliche Ressource, 5. - 13. September 2009, Bonn, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft}, publisher = {Deutsche Bodenkundliche Gesellschaft (Selbstverlag)}, address = {Bonn}, language = {de} } @inproceedings{SchneiderMaurerGerke, author = {Schneider, Anna and Maurer, Thomas and Gerke, Horst H.}, title = {Quantification of initial 3D sediment mass balance components in an artificially-created hydrologic catchment using GOCAD}, series = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, booktitle = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{MaurerSchneiderBuczkoetal., author = {Maurer, Thomas and Schneider, Anna and Buczko, Uwe and Gerke, Horst H.}, title = {A 3D structutre model of an artificially constructed soil-geo-system}, series = {6th International Symposium on Ecosystem Behaviour BIOGEOMON 2009}, booktitle = {6th International Symposium on Ecosystem Behaviour BIOGEOMON 2009}, editor = {Ukonmaanaho, Liisa and Nieminen, Tiina Maileena and Starr, Michael}, publisher = {Finnish Forest Research Institute}, address = {Vantaa, Finland}, isbn = {978-951-40-2177-0}, pages = {S. 65}, language = {en} } @inproceedings{BadorreckGerkeVontobel, author = {Badorreck, Annika and Gerke, Horst H. and Vontobel, Peter}, title = {Neutronenradiographische Untersuchungen der kleinr{\"a}umig heterogenen Wasserbewegung in kohlehaltigen B{\"o}den}, series = {B{\"o}den - eine endliche Ressource, 5. - 13. September 2009, Bonn, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft}, booktitle = {B{\"o}den - eine endliche Ressource, 5. - 13. September 2009, Bonn, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft}, publisher = {Deutsche Bodenkundliche Gesellschaft (Selbstverlag)}, address = {Bonn}, language = {de} } @inproceedings{MaurerSchneiderBuczkoetal., author = {Maurer, Thomas and Schneider, Anna and Buczko, Uwe and Gerke, Horst H.}, title = {A 3D model describing the initial structure of an artificial hydrological catchment}, series = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, booktitle = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{DusekGerkeVogeletal., author = {Dusek, J. and Gerke, Horst H. and Vogel, T. and Maurer, Thomas and Buczko, Uwe}, title = {2D dual permeability modeling of flow and transport in a two-scale structural lignitic mine soil}, series = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, booktitle = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{BadorreckGerkeWelleretal., author = {Badorreck, Annika and Gerke, Horst H. and Weller, Ulrich and Vontobel, Peter}, title = {Soil sealing and vesicular layer formation as initial structure development and its effect on infiltration}, series = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, booktitle = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{BadorreckGerkeVontobel, author = {Badorreck, Annika and Gerke, Horst H. and Vontobel, Peter}, title = {Unsaturated flow patterns observed in mine soils with embedded porous fragments using neutron radiography}, series = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, booktitle = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @misc{MaurerBartschSchneideretal., author = {Maurer, Thomas and Bartsch, R. and Schneider, Anna and Gerke, Horst H.}, title = {A sediment structure model for describing the 3D spatial distribution of soil hydraulic properties of an artificial catchment using pedotransfer functions}, series = {EGU General Assembly 2012, held 22-27 April, 2012 in Vienna}, journal = {EGU General Assembly 2012, held 22-27 April, 2012 in Vienna}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @misc{MaurerBartschSchneideretal., author = {Maurer, Thomas and Bartsch, R. and Schneider, Anna and Gerke, Horst H.}, title = {Modeling the initial 3D distribution of sediment structures of an artificial hydrological catchment}, series = {EGU General Assembly 2012, held 22-27 April, 2012 in Vienna}, journal = {EGU General Assembly 2012, held 22-27 April, 2012 in Vienna}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @misc{MaurerSchneiderGerke, author = {Maurer, Thomas and Schneider, Anna and Gerke, Horst H.}, title = {A structure generator for modelling the initial sediment distribution of an artificial hydrologic catchment}, series = {Hydrology and earth system sciences discussions}, volume = {8}, journal = {Hydrology and earth system sciences discussions}, number = {3}, issn = {1812-2116}, pages = {4641 -- 4699}, language = {en} } @inproceedings{SchneiderGerkeMaureretal., author = {Schneider, Anna and Gerke, Horst H. and Maurer, Thomas and Nenov, Rossen and Seifert, Stefan}, title = {Quantification of initial sediment redistribution in an artificially-created catchment using a time series of digital elevation models}, series = {European Geosciences Union General Assembly 2011, Vienna, Austria, 03 - 08 April 2011}, booktitle = {European Geosciences Union General Assembly 2011, Vienna, Austria, 03 - 08 April 2011}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{SchneiderGerkeMaureretal., author = {Schneider, Anna and Gerke, Horst H. and Maurer, Thomas and Nenov, Rossen and Raab, Thomas}, title = {Hydro-geomorphic differentiation of an artificial catchment during the initial phase of ecosystem development}, series = {AGU Fall Meeting 2011, San Francisco, Calif., 5-9 Dec. 2011}, booktitle = {AGU Fall Meeting 2011, San Francisco, Calif., 5-9 Dec. 2011}, pages = {H31A-1134}, language = {en} } @inproceedings{BadorreckGerke, author = {Badorreck, Annika and Gerke, Horst H.}, title = {Visualization of soil structure modifications and infiltration patterns by ground-dwelling beetle larvae and moss vegetation}, series = {European Geosciences Union, General Assembly 2011, Vienna, Austria}, booktitle = {European Geosciences Union, General Assembly 2011, Vienna, Austria}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{GerkeMaurerKlaukeetal., author = {Gerke, Horst H. and Maurer, Thomas and Klauke, A. and Dominik, R. and Dimitrov, M. and Biemelt, Detlef and Badorreck, Annika}, title = {Modelling the initial 3D sediment structure of an artificially constructed hydrological catchment}, series = {EGU General Assembly 2008, Wien}, booktitle = {EGU General Assembly 2008, Wien}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @misc{GerkeMaurerDuseketal., author = {Gerke, Horst H. and Maurer, Thomas and Dusek, J. and Klauke, A. and Badorreck, Annika}, title = {A 3D structural model of a lignitic mine soil based on classification and interpolation of profile images}, series = {EUROSOIL 2008, Book of Abstracts, 25.-29. August 2008, Vienna, Austria}, journal = {EUROSOIL 2008, Book of Abstracts, 25.-29. August 2008, Vienna, Austria}, editor = {Blum, Winfried E. H. and Gerzabek, Martin H. and Vodrazka, Martin}, publisher = {University of Natural Resources and Applied Life Sciences (BOKU)}, address = {Wien}, isbn = {978-3-902382-05-4}, pages = {S. 175}, language = {en} } @misc{MaurerSchneiderGerke, author = {Maurer, Thomas and Schneider, Anna and Gerke, Horst H.}, title = {Modelling 3D subsurface structures of an artificial hydrological catchment using gOcad}, series = {Proceedings of the 31st GOCAD Meeting, June 7th-10th, Nancy, France}, journal = {Proceedings of the 31st GOCAD Meeting, June 7th-10th, Nancy, France}, publisher = {Association Scientifique pour Ia Geologie et ses Applications}, address = {Vandoeuvre-l{\`e}s-Nancy}, language = {en} } @inproceedings{MaurerSchneiderBuczkoetal., author = {Maurer, Thomas and Schneider, Anna and Buczko, Uwe and Gerke, Horst H.}, title = {Reproducing the initial internal structural heterogeneity of an artificially created catchment}, series = {Structures and processes of the initial ecosystem development, 1st International Conference assoc. with 4th Meeting of Young Researchers in Earth Sciences (MYRES), 20-24 Sept. 2010, Cottbus, Germany}, booktitle = {Structures and processes of the initial ecosystem development, 1st International Conference assoc. with 4th Meeting of Young Researchers in Earth Sciences (MYRES), 20-24 Sept. 2010, Cottbus, Germany}, publisher = {BTU}, address = {Cottbus}, pages = {76 -- 77}, language = {en} } @misc{BadorreckGerkeHuettl, author = {Badorreck, Annika and Gerke, Horst H. and H{\"u}ttl, Reinhard F.}, title = {Effects of Ground-Dwelling Beetle Burrows on Infiltration Patterns and Pore Structure of Initial Soil Surfaces}, series = {Vadose Zone Journal}, volume = {11}, journal = {Vadose Zone Journal}, number = {1}, issn = {1539-1663}, language = {en} } @misc{SchneiderGerkeMaurer, author = {Schneider, Anna and Gerke, Horst H. and Maurer, Thomas}, title = {3D initial sediment distribution and quantification of mass balances of an artificially-created hydrological catchment based on DEMs from aerial photographs using GOCAD}, series = {Physics and Chemistry of the Earth}, volume = {36}, journal = {Physics and Chemistry of the Earth}, number = {1-4}, issn = {1474-7065}, doi = {10.1016/j.pce.2010.03.023}, pages = {87 -- 100}, language = {en} } @misc{GerkeBadorreckEinecke, author = {Gerke, Horst H. and Badorreck, Annika and Einecke, Markus}, title = {Single- and dual-porosity modelling of flow in reclaimed mine soil cores with embedded lignitic fragments}, series = {Journal of Contaminant Hydrology}, volume = {104}, journal = {Journal of Contaminant Hydrology}, number = {1-4}, issn = {1873-6009}, doi = {10.1016/j.jconhyd.2008.10.009}, pages = {90 -- 106}, language = {en} } @misc{MaurerSchneiderGerke, author = {Maurer, Thomas and Schneider, Anna and Gerke, Horst H.}, title = {A structure generator for modelling the initial sediment distribution of an artificial hydrologic catchment}, series = {Hydrology and earth system sciences}, volume = {15}, journal = {Hydrology and earth system sciences}, number = {12}, issn = {1607-7938}, pages = {3617 -- 3638}, language = {en} } @misc{SchaafBensFischeretal., author = {Schaaf, Wolfgang and Bens, Oliver and Fischer, Anton and Gerke, Horst H. and Gerwin, Werner and Gr{\"u}newald, Uwe and Holl{\"a}nder, Hartmut M. and K{\"o}gel-Knabner, Ingrid and Mutz, Michael and Schloter, Michael and Schulin, Rainer and Veste, Maik and Winter, Susanne and H{\"u}ttl, Reinhard F.}, title = {Patterns and processes of initial terrestrial-ecosystem development}, series = {Journal of Plant Nutrition and Soil Science}, volume = {174}, journal = {Journal of Plant Nutrition and Soil Science}, number = {2}, issn = {1522-2624}, doi = {10.1002/jpln.201000158}, pages = {229 -- 239}, abstract = {Ecosystems are characterized as complex systems with abiotic and biotic processes interacting between the various components that have evolved over long-term periods. Most ecosystem studies so far have been carried out in mature systems. Only limited knowledge exists on the very initial phase of ecosystem development. Concepts on the development of ecosystems are often based on assumptions and extrapolations with respect to structure-process interactions in the initial stage. To characterize the effect of this initial phase on structure and functioning of ecosystems in later stages, it is necessary to disentangle the close interaction of spatial and temporal patterns of ecosystem structural assemblages with processes of ecosystem development. The study of initial, less complex systems could help to better identify and characterize coupled patterns and processes. This paper gives an overview of concepts for the initial development of different ecosystem compartments and identifies open questions and research gaps. The artificial catchment site "Chicken Creek" is introduced as a new research approach to investigate these patterns and processes of initial ecosystem development under defined boundary conditions. This approach allows to integrate the relevant processes with related pattern and structure development over temporal and spatial scales and to derive thresholds and stages in state and functioning of ecosystems at the catchment level.}, language = {en} } @incollection{HuettlFluehlerGerkeetal., author = {H{\"u}ttl, Reinhard F. and Fl{\"u}hler, Hannes and Gerke, Horst H. and Maurer, Thomas and Schneider, Anna}, title = {Project C5 - Development of a structure and process model}, series = {Structures and processes of the initial ecosystem development phase in an artificial water catchment (Final report CRC/TR 38)}, booktitle = {Structures and processes of the initial ecosystem development phase in an artificial water catchment (Final report CRC/TR 38)}, editor = {H{\"u}ttl, Reinhard F. and K{\"o}gel-Knabner, Ingrid and Schulin, Rainer and Gerwin, Werner}, publisher = {BTU, Forschungszentrum Landschaftsentwicklung und Bergbaulandschaften (FZLB)}, address = {Cottbus}, pages = {101 -- 110}, language = {en} } @inproceedings{MaurerBartschSchneideretal., author = {Maurer, Thomas and Bartsch, Robert and Schneider, Anna and Buczko, Uwe and Gerke, Horst H.}, title = {Modellierung der strukturellen Heterogenit{\"a}t in einem k{\"u}nstlichen Wassereinzugsgebiet und Ableitung von hydraulischen Eigenschaften mittels Pedotransferfunktionen}, series = {B{\"o}den verstehen, B{\"o}den nutzen, B{\"o}den fit machen, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft, 3. - 9. September 2011}, booktitle = {B{\"o}den verstehen, B{\"o}den nutzen, B{\"o}den fit machen, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft, 3. - 9. September 2011}, language = {de} } @inproceedings{MaurerSchneiderBuczkoetal., author = {Maurer, Thomas and Schneider, Anna and Buczko, Uwe and Gerke, Horst H.}, title = {Modelling the structural heterogeneity of an artificial hydrological catchment}, series = {EGU General Assembly 2011, Vienna, Austria, 03 - 08 April 2011}, booktitle = {EGU General Assembly 2011, Vienna, Austria, 03 - 08 April 2011}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, pages = {11803}, language = {en} } @inproceedings{SchneiderMaurerGerke, author = {Schneider, Anna and Maurer, Thomas and Gerke, Horst H.}, title = {3D-r{\"a}umliche Beschreibung initialer Sedimentumverteilung in einem k{\"u}nstlichen Einzugsgebiet}, series = {B{\"o}den verstehen, B{\"o}den nutzen, B{\"o}den fit machen, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft, 3. - 9. September 2011}, booktitle = {B{\"o}den verstehen, B{\"o}den nutzen, B{\"o}den fit machen, Jahrestagung der Deutschen Bodenkundlichen Gesellschaft, 3. - 9. September 2011}, language = {de} } @incollection{SchneiderMaurerGerke, author = {Schneider, Anna and Maurer, Thomas and Gerke, Horst H.}, title = {Aspects of initial surface development}, series = {The artificial catchment Chicken Creek - initial ecosystem development 2005-2010}, booktitle = {The artificial catchment Chicken Creek - initial ecosystem development 2005-2010}, editor = {Elmer, Michael and Schaaf, Wolfgang and Biemelt, Detlef and Gerwin, Werner and H{\"u}ttl, Reinhard F.}, publisher = {FZLB}, address = {Cottbus}, pages = {11 -- 32}, language = {de} } @inproceedings{SchneiderMaurerGerke, author = {Schneider, Anna and Maurer, Thomas and Gerke, Horst H.}, title = {3D sediment mass balance of an artificially-created catchment using multi-temporal digital elevation data and GOCAD}, series = {EGU General Assembly 2010, held in Vienna, Austria, 02 - 07 May 2010}, booktitle = {EGU General Assembly 2010, held in Vienna, Austria, 02 - 07 May 2010}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{MaurerSchneiderBuczkoetal., author = {Maurer, Thomas and Schneider, Anna and Buczko, Uwe and Gerke, Horst H.}, title = {Ein 3D Modell zur Darstellung der Initialstruktur eines k{\"u}nstlichen Einzusgebiets}, series = {Jahrestagung der Deutschen Bodenkundlichen Gesellschaft, B{\"o}den - eine endliche Ressource, 5. - 13. September 2009 Bonn, Exkursionsf{\"u}hrer}, booktitle = {Jahrestagung der Deutschen Bodenkundlichen Gesellschaft, B{\"o}den - eine endliche Ressource, 5. - 13. September 2009 Bonn, Exkursionsf{\"u}hrer}, publisher = {Dt. Bodenkundliche Gesellschaft}, address = {Oldenbourg}, language = {de} } @inproceedings{MaurerSchneiderBuczkoetal., author = {Maurer, Thomas and Schneider, Anna and Buczko, Uwe and Gerke, Horst H.}, title = {Generating the 3D internal sediment structure of an artificial catchment}, series = {EGU General Assembly 2010, held in Vienna, Austria, 02 - 07 May 2010}, booktitle = {EGU General Assembly 2010, held in Vienna, Austria, 02 - 07 May 2010}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} } @inproceedings{GerkeSchneiderMaureretal., author = {Gerke, Horst H. and Schneider, Anna and Maurer, Thomas and Raab, Thomas}, title = {Quantification and reconstruction of Initial 3D Sediment Mass Distribution in an Artificially-Created Catchment Area Using GOCAD}, series = {American Geophysical Union, Fall Meeting - Eos transactions}, volume = {90}, booktitle = {American Geophysical Union, Fall Meeting - Eos transactions}, number = {52, Suppl.}, abstract = {For systems such as soils or watersheds, the initial distribution of sediment mass and composition at the starting point of the development are mostly not well-known. The development of such systems, however, has frequently been assumed to depend on boundary and initial conditions including the solid phase. Here, an experimental watershed of about 6 ha surface area was artificially-created in order to imitate an initial stage just at the beginning of the geo-ecosystem development. However, sediment homogeneity could not be achieved for this large-scale field experiment, and the 3D spatial distribution of structures and components remained uncertain. The objective of this study was to quantify and reconstruct the initial sediment distribution and the first development stages using aerial photographs, point information, and a 3D model. The watershed was made of coarse-textured sediments of quaternary origin with a low permeable clay liner as the bottom boundary. A 2D horizontal digital elevation model (DEM) of the surface and a DEM of the subsurface clay layer are used to construct a 3D triangulated numerical grid of the catchment's initial spatial structure using the 3D-GIS software GOCAD. Physical and chemical soil properties obtained from borehole samples are assigned to this model and interpolated onto the 3D grid. The volumetric changes in space and time are quantified and related to material properties to obtain the mass changes. Correlations between terrain attributes, sediment properties, and mass changes are explored specifically in regions of differing source materials. A temporal sequence of surface DEMs is obtained from photogrammetric, high-precision ground based laser scanning and airborne laser scanning data. 3D models of elevation change are constructed from these DEMs. The processes following the initial state are mainly characterized by runoff-induced erosive mass relocations related to the distribution of surface and subsurface structures and sediment properties. The results suggest that both sediment structures and mass translocations differ between the western and eastern parts of the watershed and that correlations between initial surface structures and subsequent mass changes exist.}, language = {en} } @inproceedings{SchaafGerwinKoegelKnabneretal., author = {Schaaf, Wolfgang and Gerwin, Werner and K{\"o}gel-Knabner, Ingrid and Gerke, Horst H. and Schulin, Rainer and Schloter, Michael and H{\"u}ttl, Reinhard F.}, title = {Point zero: the missing link in initial soil formation concepts}, series = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, booktitle = {EGU General Assembly 2009, Vienna, Austria, 19 - 24 April 2009}, publisher = {European Geophysical Society}, address = {Katlenburg-Lindau}, language = {en} }