运河桐乡段水质变化特征及污染原因分析  

Analysis of Water Quality Change Characteristics and Pollution Causes in Tongxiang Section of Canal

作　　者：蒋鹏 李如意[2] 胡茜 赵远[2] 霍昕怡 周飞艳 樊聪聪 王泽南 JIANG Peng;LI Ru-yi;HU Qian;ZHAO Yuan;HUO Xin-yi;ZHOU Fei-yan;FAN Cong-cong;WANG Ze-nan(Jiangsu Longhuan Environmental Technology Co.Ltd.,Changzhou 213001,China;School of Environmental Science and Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]江苏龙环环境科技有限公司,江苏常州213001 [2]常州大学环境科学与工程学院,江苏常州213164

出　　处：《安徽化工》2024年第2期145-149,共5页Anhui Chemical Industry

摘　　要：京杭大运河是我国南北水上交通运输枢纽,运河桐乡段位于京杭大运河最上游,是桐乡市集中饮用水源。运河桐乡段各控制断面虽然年均水质能够稳定达标,但是月度监测有时出现低溶解氧(DO)或总磷(TP)超标的情况。本研究于2020年5月(平水期)、2020年6月(丰水期)、2020年12月(枯水期)对运河桐乡段干流开展了3次水质加密监测,研究了常规水质指标的时空变化规律。简要分析了运河桐乡段水体低溶解氧和总磷超标的原因。结果显示,影响DO达标的重点控制区域为大麻渡口来水、监测点11~13段;影响TP达标的重点控制区域为监测点5~7段、监测点8~9段、监测点18~24段。水体DO浓度下降受上游来水影响较大,桐乡运河TP污染主要来自于桐乡自身。The Beijing-Hangzhou Grand Canal is the north and south water transportation hub,the Tongxiang Section of the Canal(TXSC)is located at the most upstream of the Beijing-Hangzhou Grand Canal,Tongxiang City is a concentrated drinking water source.Although the annual water quality of each control section in Tongxiang Section of the Canal can reach the standard stably,the monthly monitoring sometimes shows that low dissolved oxygen(DO)or total phosphorus(TP)ex-ceeds the standard.In this study,water quality monitoring was carried out three times in May 2020(normal water season),June 2020(wet season)and December 2020(dry season)on the main stream of Tongxiang Section of the Canal,and the spatio-temporal variation of conventional water quality indexes was studied.The reasons of exceeding the standard of low dis-solved oxygen and total phosphorus in Tongxiang Section of Canal were analyzed briefly.The results show that the key control areas affecting the DO standard are:the inlet water of hemp ferry and the monitoring site section 11~13.Key control areas affecting TP standards are:monitoring sites 5~7,8~9,and 18~24.The decrease of DO concentration in water body is greatly influenced by upstream water inflow,and TP pollution in Tongxiang canal mainly comes from Tongxiang itself.

关 键 词：运河桐乡段 水质监测 污染成因 

分 类 号：X52[环境科学与工程—环境工程] X824