![]() ![]() To regenerate emergent vegetation in constructed delta lakes. This should be taken into account when applying water drawdown as a cyclic measure While water drawdown in delta lakes on marine clay resulted in vegetation development, it can also induce in changes Sediment Management: Drawdowns allow the nutrient-rich sediments to de-water, compact, oxidize, and form a hardened crust over the lake bottom. ![]() In shore sediment, lower element fluxes were observed compared to lake Induced a strong flux of released sulphate and calcium over the sediment-water interface, while expected fluxes of phosphateĪnd nitrogen to the surface water remained limited. Phosphate concentrations (up to 90%), while this was not observed for shore sediments with a desiccation history. Desiccation of lake sediment resulted in a decline in pore-water Sediments from the Oostvaardersplassen (The Netherlands). In a mesocosm study, we investigated element fluxesīetween sediment and pore-water during water drawdown and over the sediment-water interface during subsequent rewetting using Reintroducing water table fluctuations in such lakes will stimulate emergent vegetation development,īut potential alterations in nutrient fluxes are still largely unknown. These pumping tests are completed to ensure enough water. For several decades, these pools supported a wealth of fish, wildlife and aquatic habitat, but it gradually diminished. In densely populated delta regions, many freshwater shallow lakes constructed on top of marine deposits and their water tablesĪre maintained at a fixed level. Transient Non-Community water systems serve 25 or more different people for 60 days or more in a year. ![]()
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