基于综合营养状态指数的汾河景区湿地水体富营养化研究  

Eutrophication of Wetland Water in Fenhe River Scenic Area Based on Comprehensive Nutritional State Index

作　　者：崔苗 张晨[2] CUI Miao;ZHANG Chen(Taiyuan Ecological Environment Monitoring Center,Taiyuan,Shanxi 030002,China;College of Resources and Environment,Shanxi University of Finance and Economics,Taiyuan,Shanxi 030006,China)

机构地区：[1]山西省太原生态环境监测中心,山西太原030002 [2]山西财经大学资源环境学院,山西太原030006

出　　处：《中国水土保持》2023年第4期49-52,I0007,共5页Soil and Water Conservation in China

基　　金：国家自然科学基金项目(22106096);山西省回国留学人员科研资助项目(2021—102);中央引导地方科技发展专项资金项目(YDZX 20191400002539);山西省水利科学技术研究与推广项目(2022GM026)。

摘　　要：随着城市化进程的加快,水生态环境问题越发凸显。黄河支流的汾河景区作为太原城市的“绿肺”,有着涵养水源、美化环境、防止水土流失等重要作用。本研究通过对2021年4—10月汾河景区14个监测点位的湿地水体重要污染物指标进行逐月监测,计算汾河景区综合营养状态指数,评价汾河景区水体富营养化情况,并针对当前存在的问题提出汾河景区水生态环境保护对策,以期为提升水生态环境质量、重塑水景观风貌提供数据支撑。结果表明:2021年汾河景区总氮全年超标,氨氮在8月超标,其余项目均符合地表水Ⅴ类标准;综合营养状态指数为53.89,属轻度富营养化;综合营养状态指数在7、8、9月明显高于其他月份,在8月达到峰值,且在远离城市中心的柴村桥监测点位最低,在城市中心区域的南内环桥、南中环桥南、长风桥、跻汾桥等监测点位相对较高,水质状况与温度和人类活动密切相关。With the acceleration of urbanization,water ecological environment issues are becoming increasingly prominent.As the green lung of Taiyuan City,Fenhe River scenic area,a tributary of the Yellow River,plays an important role in conserving water,beautifying the environment and preventing soil erosion.Through the monthly monitoring of the important pollutant indexes of wetland water in 14 monitoring points in the Fenhe scenic area from April to October in 2021,the paper calculated the comprehensive nutritional state index of the scenic area and evaluated the eutrophication of water in the area In view of the existing problems,it put forward the countermeasures of water ecological environment protection for the area in order to provide data support for improving the quality of water ecological environment and reshaping water landscape style.The outcomes show that a)in 2021,the total nitrogen of the scenic area exceeds the standard for the whole year and the ammonia nitrogen exceeds the standard in August.The other items all meet the Class V standard for surface water;b)the comprehensive nutritional status index is 53.89,belonging to mild eutrophication and;c)the comprehensive nutritional status index is significantly higher in July,August and September than in other months and reaches its peak in August.The index is lowest at Chaicun Bridge,which is far from the city center and the indexes are relatively higher in the monitoring sites of South Inner Ring Bridge,South Central Ring Bridge,Changfeng Bridge and Jifen Bridge in the central area of the city.The water quality is closely related to temperature and human activities.

关 键 词：综合营养状态指数 湿地水体 富营养化 水生态环境保护 汾河景区 

分 类 号：X524[环境科学与工程—环境工程] X824