Evaluation of Taihu Lake’s pollution control based on DYRESM-CAEDYM model
Journal Title: Science Paper Online - Year 2009, Vol 4, Issue 5
Abstract
Based on the DYRESM-CAEDYM model developed by Centre for Water Research, the University of Western Australia, this thesis simulates the water quality of Taihu Lake in 2005, settles a set of parameters applicable for the simulation, and validates the simulation result. The water-temperature simulation result is rather satisfactory, which indicates that the all-year simulated fluctuation of TN, TP and algal concentration agrees with the measured data. Furthermore, this thesis applies the model in the evaluation of pollution control effectiveness, comparing the three measures—sediment clearance, water re-distribution and inflow pollution control—in their effect of water-quality melioration of Taihu Lake. According to the comparison, TN concentration declines respectively by 16%, 6% and 30%; TP concentration declines respectively by 4.6%, 4.1% and 31.8%; peak algal concentration declines from 61.01 μg/L respectively to 55.79, 55.92 and 52.99 μg/L; and the number of days in which algae concentration exceeds Level IV (30 μg/L) declines from 88 respectively to 44, 81 and 43. Sediment clearance (CASE-1) and inflow pollution control (CASE-3) enable Taihu Lake’s water quality to stay in Level IV, which is better than water re-distribution (CASE-2). The DYRESM-CAEDYM model would be implemented in the simulation of water-quality amelioration effectiveness with multiple control measures in the future, and more research would be made on the method of the pollution control and the fore-warning of the cyanobacteria blooming of Taihu Lake.
Authors and Affiliations
Liming Chen , Xin Qian , Yuchao Zhang
Keywords
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