摘要
采用数值模拟方式预测和评估水电工程对其影响区内饮用水水源地的水质风险,其目的在于辨析工程对取水水质安全的影响。以汉江上游待建旬阳水电站库区内水源地为例,建立二维水流和水质数学模型,分析了水域水动力学和水质变化特征,选取最不利方案进行水质风险评估,并从水体水动力特征和营养状态判别了富营养化风险程度。研究表明:工程兴建后水源地水域水流变化和取水口临近支流潜在污染源的威胁,水质遭受污染的风险增大,在月河水质超标及特定水库运行条件下许家台取水口水质无法保障。同时,水域富营养化水平相比建库前并没有显著的提高。研究可为水电开发涉及水源地项目的水环境影响分析提供理论依据。
The numerical simulation method is applied to predict and assess water quality risk for drinking water sources disturbed by hydroelectric projects,and the objective is to identify the influence of such pro- jects. The case study was a drinking water source within the planned XunYang Reservoir at the upper reach of the Hanjiang River. A 2-dimension water flow and water quality model was constructed. The propertied of hydrodynamics and water quality were analyzed, and the worst scenario was used for risk assessment. The hazard of eutrophication was evaluated by the flow and tropic states. The results indicated that, the in- let for drinking water would be under the threat from a nearby tributary （the Yue River） after the con- struction of the project, and the risk of drinking water pollution would be increased. Required drinking wa- ter quality would not be satisfied if the water quality in the tributary did not meet the standards under cer- tain reservoir operation scenarios. However, the tropic level of water would not be significantly influenced by the project. This study could be applied for similar projects for water quality assessment.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2013年第1期59-65,共7页
Resources and Environment in the Yangtze Basin
基金
国家重点基础研究计划(973)项目(2012CB723200)
关键词
水电工程
汉江上游
饮用水水源地
数值模型
风险评估
hydroelectric power projects
Upper Hanjiang River
drinking water source zone l hydrodynam.cs and water quality model
risk assessment
