- Department:(Dept. 1) Ecohydrology and Biogeochemistry
Density effects at a concordant bed natural river confluence
Confluences are locations of complex hydrodynamic conditions within river systems. The effects on hydrodynamics and mixing of temperature‐induced density differences between incoming flows were investigated at a small‐size concordant bed confluence.
Geochemical signatures of lignite mining products in sediments downstream a fluvial-lacustrine system
The authors have investigated whether and to what extent mining products from the Lusatian mining are deposited in the sediments of the River Spree: their signature in the river bed reaches 90 kilometres.
Sulphate in freshwater ecosystems: a review of sources, biogeochemical cycles, ecotoxicological effects and bioremediation
Sulphate pollution of inland waters is a persistent global problem. Climate change, land use and acid mining drainage are among the main causes. The review shows that sulphate affects the biogeochemical turnover of carbon, nitrogen and phosphorus and can have toxic effects on aquatic organisms. Bioremediation in buffer zones is a possible mitigation tool.
Geochemical focusing and sequestration of manganese during eutrophication of Lake Stechlin (NE Germany)
Eutrophication of Lake Stechlin leads to changes in the sediment by an intensification of internal matter cycles. The reductive dissolution of Mn in shallow areas and the precipitation result in the fixation of Mn as rhodochrosite in the sediment below 56 m depth. Geochemical Mn focusing indicates oxygen-free conditions in deep water and can be used to reconstruct former environmental conditions.
Peak grain forecasts for the US High Plains amid withering waters
A predator-prey model shows the coupled dynamics of groundwater use and crop production. It provides the scientific basis for the sustainability analysis of the irrigation of agricultural land with groundwater.
Homogenization of the terrestrial water cycle
Plant uniformity in highly managed agricultural landscapes has led to increases in flood and drought frequencies and magnitudes, as well as a poorer water quality. The study explores the risk of the homogenization of the terrestrial water cycle.
The fate of polar trace organic compounds in the hyporheic zone
The authors measured microbial metabolism based on reactive fluorescent tracers and its influence on contaminant transformation in a natural streambed. The fluorescent tracers informs on exposure times in specific milieus, and the study validates lab results on the microbially mediated transformation of gabapentin into its main transformation product under natural conditions.