Abstract
This study adopted the water quality model [Water Quality Analysis Simulation Program (WASP)] to simulate and evaluate the impacts of the opening and closure of an interception system at the tributary of Love River on mainstream water quality. The gates were opened respectively for 4, 12, and 24 hours to assess the impact on biochemical oxygen demand (BOD) and ammonia nitrogen (NH3-N) in the water bodies of Love River. The WASP model was used to evaluate the self-purification capacity of the river. According to the results of the model estimation, it takes 5 days for NH3-N and BOD in the water bodies of Love River to return to normal and for the water to restore its original water quality after the closure of the Baozhu Ditch gate. Results of this study can be used as a reference for Love River watershed management, and the WASP modeling can be applied for decision makers to develop appropriate management strategies of the interception system.
Highlights
A large number of research studiees in the past applied a model to simulate water quality [1,2,3,4]
The Water Quality Analysis Simulation Program (WASP) water quality model was used to simulate the impact of the closure of gates on Love River and evaluate programs with different opening times
This study will take into account the following situations: (1) Open the gates in sunny days to simulate the impact of pollutant loads on the water quality of Love River for 4, 12, and 24 hours after the opening of gates to determine the appropriate timing during sunny days
Summary
A large number of research studiees in the past applied a model to simulate water quality [1,2,3,4]. Water quality models were seldom used to evaluate the impacts of the opening and closure of gates to a river in the past [5,6]. This study selected the WASP water quality model to evaluate the quality benefits and impacts of the opening and closure of an interception system on river water quality, simulated the water quality of the river at the closure of the interception system, and simulated the impact of the opening time of gates on water quality. The range of water quality simulation of Love River was constructed from the upstream boundary, Hougang Bridge (10.1 km from the marine outfall), to the downstream boundary, Kaohsiung Bridge (the marine outfall), with a total length of 10.1 km.
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