Introduction

Willersinnweiher is an excavator lake in the highly industrialized area of Ludwigshafen/Rhein, Germany. The pond is freequently used as recreation area for the urban population for its water chemistry has to keep standards of the European Community. The entry of nutrients from adjacent agricultural areas and pollution by industrial and private sewage in the last few decades led to an increasing eutrophication of the lake which required complex efforts to improve its water chemistry (Sandler 2000). These days, the water quality of Willersinnweiher has improved considerably. It exists a large data set on the lake's water chemistry and physical construction and in the surrounding area 12 piezometers for the examination of surface water/groundwater coupling were installed.
At Willersinnweiher processes will be studied in different compartments of the dimictic system: in the layered water column during stagnation in summer, at the free water / pore water interface during the circulation period and in the Quaternary shallow aquifer during the whole year. Additionally, sediment cores and material from sediment traps as well as particles from the water column will be investigated.

Projects

Former Projects

Associated works at Willersinnweiher