入湖河流对千岛湖水质影响研究——以CODMn为例  

Study on the influence of inflowing rivers on the water quality of Qiandao Lake:taking CODMn as an example

作　　者：谢培 高峰[2] 王书航[4] 张博[4] 乔飞[1,3] 何川[1] 张乐 XIE Pei;GAO Feng;WANG Shuhang;ZHANG Bo;QIAO Fei;HE Chuan;ZHANG Le(State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;College of Resources Environment and Tourism,Capital Normal University,Beijing 100048,China;National Engineering Laboratory for Lake Pollution Control and Ecological Restoration,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;Lake Environmental Research Institute,Chinese Research Academy of Environmental Sciences,Beijing 100012,China)

机构地区：[1]环境基准与风险评估国家重点实验室,中国环境科学研究院,北京100012 [2]首都师范大学资源环境与旅游学院,北京100048 [3]湖泊水污染治理与生态修复技术国家工程实验室,北京100012 [4]中国环境科学研究院湖泊环境研究所,北京100012

出　　处：《环境工程技术学报》2019年第6期692-700,共9页Journal of Environmental Engineering Technology

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07107-001-02);国家重点研发计划项目(2017YFC0404702)

摘　　要：以千岛湖湖内重点监测断面高锰酸盐指数(COD Mn)实测数据为基础,基于EFDC(environmental fluid dynamics code)模型构建适用于千岛湖的二维水质模型,通过设置不同情景方案,分析千岛湖上游入流和湖周入流COD Mn变化对湖内COD Mn的影响,解析边界COD Mn和湖内重点监测断面COD Mn间的响应关系,并定量计算上游入流COD Mn变化对湖内重点监测断面COD Mn的影响和贡献。结果表明:通过多组常降解系数平行模拟方法,确定千岛湖湖体COD Mn的降解系数(k)为0.0015;上游入流COD Mn与湖内重点监测断面COD Mn之间存在显著的响应关系,当上游入流COD Mn为6.0 mg L时,湖内威坪林场至三谭岛断面COD Mn超过GB 3838—2002《地表水环境质量标准》Ⅱ类标准;上游入流响应系数明显大于湖周入流响应系数,上游入流对湖内威坪林场、小金山、三潭岛、大坝前4个重点监测断面COD Mn的贡献率分别为82.0%~92.3%、73.8%~88.2%、53.8%~62.8%和57.7%~76.4%。上游入流是影响千岛湖湖内重点监测断面COD Mn的主要因素,建议加强对上游入流的水质监测和污染控制。Based on the measured data of COD Mn in the key monitoring sections of Qiandao Lake,a two-dimensional water quality model for Qiandao Lake based on the Environmental Fluid Dynamics Code(EFDC)Model was established.The influence of inflow COD Mn from upstream and the inflows around the lake on the COD Mn in inner Qiandao Lake were analyzed by various scenarios.The response relation between the boundary COD Mn and the COD Mn at key monitoring sections in the lake was analyzed,and the influence and contribution of the upstream inflow COD Mn variation on the COD Mn of the key monitoring sections in the lake were quantified.Results showed that the comprehensive degradation coefficient(k)of COD Mn in Qiandao Lake was 0.0015,according to the parallel simulation of several constant degradation coefficients.There existed an obvious response relation between the upstream inflow COD Mn and COD Mn in the key monitoring sections.When the upstream inflow COD Mn was 6 mg L,COD Mn between Weipinglinchang to Santandao sections exceeded GradeⅡwater quality standard of Surface Water Environmental Quality Standards(GB 3838-2002).Meanwhile,simulated results showed that the response coefficients of upstream inflows were obviously larger than that of inflows around the lake.The contribution rate of upstream inflows to COD Mn in key monitoring sections of Weipinglinchang,Xiaojinshan,Santandao and Dabaqian was 82.0%-92.3%,73.8%-88.2%,53.8%-62.8%and 57.7%-76.4%,respectively.The impact of COD Mn on key monitoring sections from upstream inflows was greater than the inflows around the lake.The results indicated that upstream inflows were the main factors affecting the COD Mn of the key monitoring sections in Qiandao Lake.Therefore,the water quality monitoring and pollutant control should be strengthened for upstream inflows.

关 键 词：千岛湖 EFDC模型 水质模拟 响应关系 情景模拟 

分 类 号：X524[环境科学与工程—环境工程]