不同水质目标下居延海(东)水环境容量分析  

Analysis of Water Environmental Capacity Under Different Water Quality Targets in the Juyan Lake (East)

作　　者：李静 沈梦兰 何立山 王红 张红霞 LI Jing;SHEN Menglan;HE Lishan;WANG Hong;ZHANG Hongxia(Inner Mongolia Autonomous Region Alxa Ecological Environment Monitoring Station,Alxa League 750306,China)

机构地区：[1]内蒙古自治区阿拉善生态环境监测站,内蒙古阿拉善750306

出　　处：《中国环境监测》2022年第3期120-125,共6页Environmental Monitoring in China

基　　金：阿拉善盟应用技术与开发资金项目(AMYY2019-16)。

摘　　要：分析居延海(东)水环境容量及变化趋势,为居延海(东)的水资源利用及保护提供依据。根据水质监测数据,运用数学模型计算居延海(东)2018—2020年不同水质目标下的化学需氧量、高锰酸盐指数、总磷和总氮的最大容量。结果表明:居延海(东)水质常年保持在Ⅳ~Ⅴ类之间;在Ⅱ类水质目标下,4项水质指标容量均超载,特别是化学需氧量和高锰酸盐指数严重超载;Ⅲ类水质目标下,化学需氧量和总氮超载,高锰酸盐指数和总磷有部分剩余容量;化学需氧量的现状水质容量已超过Ⅳ类水质目标的容量,是居延海(东)的主要污染因子。Based on the analysis of water environment capacity and changing trend in the Juyan Lake(East),the paper provides basis for local utilization and protection of water resource.According to the water quality monitoring data,the maximum capacity of chemical oxygen demand,permanganate index,total phosphorus and total nitrogen in the Juyan Lake(East) under different water quality targets from 2018 to 2020 was calculated by mathematical model.The results showed that the water quality of the Juyan Lake(East) kept between Ⅳ and Ⅴ all year round.Under the class II water quality target,the capacity of the four water quality indicators were overloaded,especially the chemical oxygen demand and permanganate index.Under the objective of class Ⅲ water quality,chemical oxygen demand and total nitrogen were overload,permanganate index and total phosphorus had partial residual capacity.The current water quality capacity of chemical oxygen demand has exceeded the water quality target of class Ⅳ and is the main pollution factor in the Juyan Lake(East).

关 键 词：水环境容量 模型 居延海(东) 

分 类 号：X824[环境科学与工程—环境工程]