| 贺华翔,周祖昊,牛存稳,王浩.基于二元水循环的流域分布式水质模型构建与应用[J].水利学报,2013,44(3): |
| 基于二元水循环的流域分布式水质模型构建与应用 |
| Development of watershed distributed water quality model and its applicationsbased on dualistic water cycle theory |
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| DOI： |
| 中文关键词: 二元水循环 流域分布式水质模型 模型构建 嫩江流域 |
| 英文关键词: dualistic water cycle theory watershed distributed water quality model construction model Nenjiang River basin |
| 基金项目: |
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| 中文摘要: |
| 基于二元水循环理论，着眼于污染物产生、入河过程机理的描述，对流域分布式水质模型WEQ 进行了改进。改进模型的农田面源由陆域产生至入河的过程更具有物理机制；借助水土流失方程计算水土流失量，增强了土壤侵蚀面源污染计算结果的可信度；通过水质过程与二元水循环过程的耦合，实现了点、面源污染物入河过程的动态计算；考虑河道内人工取用水量、水库蓄水量变化对污染物时空分布的影响，进一步增强模型的物理机制。以嫩江流域为例，模拟了COD、氨氮的空间分布规律及河道断面负荷变化特征。模拟结果显示，其均方误差
与相对误差减小，模拟精 |
| 英文摘要: |
| Based on the dualistic water cycle theory， a distributed watershed water quality model called WEQ has been improved on the physical mechanism， including the processes of pollutant generation and flowing into river and so on. The improved WEQ is strengthened in its physical mechanism of pollutant from farmland，using MUSLE equation for reference to calculate the amount of soil erosion and coupling water quality and dualistic water cycle process in dynamic computation. Once the amount of water use from industries and lives in river or water storage in reservoir are changed， the changes of water quality load or concentration are considered. The model has been applied in the Nenjiang River basin to simulate spatial distribution rule of COD and ammonia nitrogen and water quality variation characteristics of river cross-section. The simulation results show that MSEQ=1.81， Re=37.4% in calibration period and MSEQ=1.45， Re= 33.8% in verification period. In order to ensure the simulation error within reasonable limits，the amount of pollutants should be adjusted with the investigation results and the river cross-section pollution load should be verified with the monitoring data. |
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