Water Quality Modeling of Pit Lakes: Development of a Multiply-Coupled Groundwater Lake Circulation and Chemical Model

摘要

Water quality of pit lakes is often determined by acid mine drainage. The system is complex because flow processes in the groundwater and the lake as well as chemical and biological water quality processes influence each other. Modeling has to consider all of these processes with their feedback to achieve reasonable representation of the system. The modeling system, MODGLUE, couples the existing groundwater model PCGEOFIM, the lake model CE-QUAL-W2, and the hydrochemical model PHREEQC. All important processes and their feedback loops are included in the model. It has been successfully applied to several lakes in Germany arid is being further developed.