南水北调中线丹江口水库调度水质影响模拟

丹江口水库是南水北调中线工程的水源供给区,整个规划库区承担着重要的区域公共生态责任.国家对库区水质、水量提出了严格的指标性要求,整体水环境安全是保障调水目标实现的基础性环节.本文在分析了库区污染源及水质现状的基础上,以2010年、2030年为评价目标年,采用D illon模型建立了水体富营养化与磷负荷之间的关系,对丹江口水库富营养化趋势做出宏观模拟分析.结果表明,水库存在富营养化的风险,需要进行纳污能力核算.结合丹江口水库水质现状、水污染特点,以及全国水资源综合规划要求,确定COD和NH3-N为纳污能力计算控制指标,选用河流二维水质模型,对库区局部污染水域纳污能力变化进行模拟分析.结果表明,水库蓄水位加至170m后,计算区域水体的COD、NH3-N月消纳总量相对157m水位时均下降,局部水域纳污能力减弱,国家及库区政府部门应给予重视.

Simulation of Water Transferring Impact on the Water Quality in Danjiangkou Reservoir of the South to North Water Diversion Middle Line Project

Danjiangkou reservoir supplies the water source for the South-to-North Water Diversion middle line project,the entire planning area plays an important role in public ecological responsibility,and the state proposed strict requirements of indicators of water quality and quantity,which means the security of overall water environment is the basic phase of achieving water diversion objectives.Based on the analysis of water pollution sources and current situation of the reservoir,this paper chooses 2010 and 2030...