宁夏引黄灌区典型排域水质综合评价与主要影响因子分析  

Comprehensive Evaluation and Main Influencing Factor of Water Quality in Drainage Areas of Ningxia Yellow River Irrigation Area

作　　者：李太云 仝炳伟 李虹 王乐 LI Tai-yun;TONG Bing-wei;LI Hong;WANG Le(Ningxia Institute of Water Resources Research,Yinchuan 750021,China;Agricultural Environmental Protection Monitoring Station,Ningxia Hui Autonomous Region,Yinchuan 750002,China)

机构地区：[1]宁夏回族自治区水利科学研究院,宁夏银川750021 [2]宁夏回族自治区农业环境保护监测站,宁夏银川750002

出　　处：《水电能源科学》2025年第4期84-88,共5页Water Resources and Power

基　　金：宁夏农业资源环境监测与保护项目(2130135)。

摘　　要：为分析宁夏引黄灌区种养殖区对地表水水质的影响,以宁夏引黄灌区第六排水沟排域为研究区,在第六排水沟选取10个典型监测断面,研究了排水沟水体内TN、NH3-N、TP、DO的变化规律与空间变化特征,采用加权欧氏距离算法和综合水质标识指数两种方法对10个监测断面的水质进行了综合评价和时空变化分析,并对排水沟水质主要影响因素进行了解析。结果表明,第六排水沟各监测断面水质综合评价结果处于Ⅲ类及以下的占比为85.8%,水质总体较好,下游水质相对较好;4、5月份受农田施肥和沟内腐烂物积存的影响水质较差,7月份随着农田施肥活动的减少和排水量增加水质达到最好;排域内水质的主要影响因子依次为TN、NH3-N、TP,主要来源为排域内农田施肥和生活污水及垃圾排放。虽然排域水质总体较好,但仍存在部分区域和时段水质相对较差的情况,需进一步对农田施肥活动、生活污水和垃圾的排放进行综合治理与控制。To analyze the influence of the planting and breeding areas on surface water quality in the Ningxia Yellow River Irrigation Area,this paper takes the sixth drainage area as the research area.The 10 monitoring sections of the sixth drainage ditch were selected to study the change law and spatial characteristics of TN,NH3-N,TP and DO.The weighted European-style distance algorithm and comprehensive water quality identification index were used to sively comprehen-evaluate the water quality of 10 monitoring sections and analyze its temporal-spatial variation.The main influencing factors of drainage water quality were analyzed.The results of the comprehensive evaluation of water quality in the toring moni-sections of the sixth drainage ditch were in classⅢand below,accounting for 85.8%,the overall water quality was good,and the downstream water quality was relatively good.The water quality is poorly affected by farmland zation fertili-in April and May and the accumulation of rot in the ditch.The water quality is best in July with the reduction of fertilizer activities and the increase of water discharge.The main influence factors of the water quality in the drainage area are TN,NH3-N and TP,the main sources are farmland fertilization and domestic sewage and garbage discharge.though Al-the water quality in the typical drainage areas is generally good,there are still relatively poor water quality in some areas and times.So,further comprehensive treatment and control of farmland fertilization activities and the discharge of domestic sewage and garbage are needed.

关 键 词：第六排水沟 综合评价 加权欧氏距离 综合水质标识指数 影响因子 

分 类 号：X824[环境科学与工程—环境工程]