WASP水质模型在表流人工湿地中的优化与应用

Optimization of WASP water quality model and its application to free water surface constructed wetland systems

首次对WASP(water quality analysis simulation program)水质模型进行优化来模拟预测表流人工湿地的水质变化。由于表流人工湿地中水生植物吸收和微生物降解作用的显著增强,通过模型率定所得WASP模型水力学、植物、生化反应的相关参数值明显高于模拟天然水体时的推荐值。对改进后WASP模型的验证结果表明,湿地水质(COD和NH4+-N)模拟值与实测值基本吻合,证明改进后的WASP模型能够有效模拟预测表流人工湿地的水质变化。

Water quality analysis simulation program（WASP） has been optimized the first time for the forecast of the water quality changes in free water surface constructed wetland. Because of the significant enhancement of the aquatic plants adsorption and microorganism degradation in free water surface constructed wetland,the relevant parameter values of the WASP model hydrodynamics,vegetation and biochemical reaction obtained through model calibration are significantly higher than the recommended values for simulating natural water bodies. The detection results of the modified WASP model show that the simulated value and actual detected value of wetland water quality（COD and NH4＋-N） are identical. It is certified that the modified WASP model can effectively simulate and forecast the water quality changes in free water surface constructed wetland.