Analytical element model analysis of the influence of different scenarios for the water level in a future retention basin
1999
Moorman, J.H.N.
The city of Amsterdam obtains one third of its drinking water from groundwater, which seeps upward into the deep Polder Bethune. The water is pumped out towards a lake that acts as a 100-day retention basin. The production has to be increased and therefore a second lake will be adapted to accommodate the increased flow. Its bottom layer will be excavated and thus a change in the hydrologic situation will occur, which might influence nearby nature reserves with high floral values. In order to investigate the influence of different scenarios for the maintained water level in the new retention basin on the local and regional flow systems, a model study was carried out using the model-code, multi layer analytic element model. Use of this method made it possible to simulate the steep gradients around nearby deep polders and the subtle changes from infiltration to seepage near the lakes in an outstanding manner.
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