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Dittrich I.,Dr. Dittrich and Partner Hydro Consult GmbH | Kessler K.,Dr. Dittrich and Partner Hydro Consult GmbH | Kruger A.,University of Leipzig | Neumeister H.,University of Leipzig
Telma | Year: 2013

In the last two decades, the concentration of dissolved organic carbon (DOC) has increased in some of the dams of the Ore Mountains, as well as in many regions in the northern hemisphere. It is feared by the State Dam Authority of Saxony and by local drinking water suppliers, that through the revitalisation of bogs, the DOC-concentration in rivers and dams will increase further. According to monitoring data for the time period of 2006 to 2011, it is evident that the blocking of ditches in a small bog revitalisation area (4.2 ha or max. 4 % of the Carlsfeld dam catchment area) did not lead to an increased DOC concentration in the adjoining rivers. The results are compared with current international literature. Source


Kessler K.,Dr. Dittrich and Partner Hydro Consult GmbH | Denner M.,Sachsisches Landesamt fur Umwelt | Dittrich I.,Dr. Dittrich and Partner Hydro Consult GmbH | Muller I.,Sachsisches Landesamt fur Umwelt | Wendel D.,Staatliche Betriebsgesellschaft fur Umwelt und Landwirtschaft
Telma | Year: 2014

Showing extensive deficiencies the situation of peatlands nowadays asks for transregional, data based and coordinated concepts. From 2008 to 2011 a concept on a Saxon information system on peatlands and organic wetlands (acronym: SIMON) was compiled by order of the Saxon State Office of Environment, Agriculture and Geology (LfULG). Gathering and merging available data on peatlands from geology, pedology, phytosociology and nature conservation planning was the first step of a GIS based implementation. Therefore, a broader meaning of the term "peatland" was used, including all organic soils showing even small layers of peat (independent from the kind of vegetation) on the one hand and land covered by a peatland specific vegetation being able to potentially build up a peat layer (independent from the soil type) on the other hand. As a result, a general survey was mapped to display the geographical extension of peatland compound areas in Saxony summing up in 46,800 ha which is 2.5 % of the Saxon state area. Only 5 ha are labelled as "active raised bogs", thus indicating how strongly peatlands are affected in Saxony today. Being widely damaged, the restoration of most peatlands is very challenging. Tools for a hydromorphological assessment and decision making were developed to help prioritizing among different peatlands. They are applied on peatlands in the mountain region as an example. These tools may contribute to focus on restoration and conservation activities on peatlands with a high rewetting potential. Furthermore, potential enhancements of SIMON are presented. Source


Edom F.,Hydrotelm | Munch A.,Dr. Dittrich and Partner Hydro Consult GmbH | Dittrich I.,Dr. Dittrich and Partner Hydro Consult GmbH | Kessler K.,Dr. Dittrich and Partner Hydro Consult GmbH | Peters R.,TU Dresden
Advances in Geosciences | Year: 2010

The hydromorphological analysis (HMA) is a method to quantify the potentials of mire revitalisation. In this study, the HMA is combined with the new peatland-tool of the water balance model AKWA-M®. This peatland-tool includes as well depth functions of the hydraulic conductivity and drainable porosity for several mire-ecotope-types as specific equations for mire evapotranspiration. The calculations were applied in several peatlands and mires of the German-Czech Ore Mountains (Erzgebirge/Krušné hory). The simulation results show that the chosen depth functions are valuable for the water balance calculation of mire ecotopes with a fully developed akrotelm like ombro- and mesotrophic peatlands. For degenerated peat soil or regenerating mires it is necessary to improve the model and the parameter calibration, especially the depth functions, with additional measured data in different peatlands. © 2010 Author(s). Source


Wahren A.,Institute of Soil Science and Site Ecology | Wahren A.,Dr. Dittrich and Partner Hydro Consult GmbH | Berkhoff K.,Leibniz University of Hanover | Herrmann S.,Leibniz University of Hanover | Feger K.-H.,Institute of Soil Science and Site Ecology
Advances in Geosciences | Year: 2010

The opening up of China's industry towards market orientation has a distinct impact on natural resources as well as on social structures. The example of rubber introduction in Yunnan province (SW China) shows the mutual interdependencies between economy, natural resources, and social structures. We assess the impacts of rubber introduction and possible development paths in the study area. An integrated modeling framework (NabanFrame) is developed for the catchment of the Naban River (size 270 km2), a tributary to the Mekong River. NabanFrame comprises an agro-economic, ecological, and social model. Altogether they interact with a land-use change model via defined interfaces. Effects on the water cycle are considered by additionally integrating the spatially distributed rainfall-runoff and water balance model AKWA-M® in the model framework. Therefore, a reasonable parameterization is needed to assess the land-use changes on areal water fluxes. The authors conclude that the chosen hydrological model is able to assess the impacts of land conversion (from forest to rubber plantations) on catchment hydrology and address further adaptations to be implemented in the hydrological model. © 2010 Author(s). Source


Wahren A.,TU Dresden | Wahren A.,Dr. Dittrich and Partner Hydro Consult GmbH | Berkhoff K.,Leibniz University of Hanover | Munch A.,Dr. Dittrich and Partner Hydro Consult GmbH | And 2 more authors.
Journal of Earth Science | Year: 2010

Land-cover changes cause a loss of natural vegetation in many parts of the world. In the Xishuangbanna (Chinese Source) district (Yunnan (Chinese Source) Province), rubber plantations replace tropical rainforests covering already an area of about 10% of the study area (2007). There, land-use allocation is mostly driven by economic considerations. Thus, local planning authorities need decision support for land-use planning issues, which integrate socio-economic and ecological aspects. Within the NabanFrame, an agro-economic, ecological and social model was applied, which, altogether, interacted with a land allocation model via defined interfaces. Effects on the water cycle, ecological conditions as well as socio-economic should be considered by integrating the spatially distributed rainfall-runoff and water balance model AKWA-M® in the model setup. © 2010 China University of Geosciences and Springer-Verlag Berlin Heidelberg. Source

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