Study on Water Replacement Characteristics of Xinghai Lake Wetland Based on Landscape Water Quality Objectives

Many issues with water quality and ecology are caused by the Xinghai Lake’s enormous catchment, significant evaporation rates, one additional supply. To quantitatively study displacement characteristics, a two-dimensional hydrodynamic-tracer coupling model based on MIKE21 was developed. The findings indicate that: (1) replacement cycle exhibits spatial heterogeneity, general characteristic of fast renewal in southern lake area slow northern area, gradient change from south to north is influenced variety factors, including lake’s flow field, flow, topography, wind field. (2) throughput has an impact majority waters Lake. When there high region velocity, rapid transport, large capacity for exchange; when low poor lengthy exchange period. (3) field Lake complicated, velocity low, it system where quick coexist. This interplay wind-generated flow. (4) speed up body’s rejuvenation, wetland needs more inlets exits introduce new sources.