宣城市青弋江干流水质及底质现状调查与分析  

作　　者：吴用 林保国 褚巍[1] 

机构地区：[1]安徽科欣环保股份有限公司,安徽合肥230601 [2]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《环境保护与循环经济》2024年第11期43-49,共7页environmental protection and circular economy

摘　　要：以青弋江(宣城段)干流水质与底质为研究对象,分析了“十四五”以来该流域泾南交界国控断面以高锰酸盐指数、氨氮、总氨、总磷为主的水质变化趋势,以及8个干流监测断面不同季节的水质空间分布特征;统计了干流上8个底泥监测样点基本情况,比较了表层底泥有机质及氮磷含量空间分布状况并进行综合评价。结果表明:泾南交界断面近年水质总体较为稳定,保持在Ⅱ类,但不同月份的水质波动较大;干流底泥主要成分为石子、砂子,质地密实,有机质、总氮及总磷含量从上游至下游呈上升趋势。经分析发现,流域水质稳定易受工业污水、畜禽养殖、河道排污口和污泥淤积等影响,需加强排污口排查,完善治理工程体系,推动农业污染防治,加强风险源管控,完善预警体系和定期进行评估。This article took the water quality and sediment of the mainstream of Qingyi River(Xuancheng section)as research object,the water quality of the Jingnan cross-section was detected mainly including permanganate index,ammonia nitrogen,total ammonia,and total phosphorus since the 14th Five-Year Plan,and the spatial distribution characteristics in different seasons at 8 monitoring sections on the mainstream were analyzed.The fundamental states of 8 sediment monitoring samples on the mainstream was summarized,and the spatial distribution of organic matter,nitrogen and phosphorus content in surface sediment were compared and comprehensively evaluated.The results showed that the water quality of the cross-section was generally stable in recent years,maintaining at Class II,but there were significant fluctuations in water quality in different months.The main components of sediment on the mainstream were stones and sands with dense texture.The content of organic matter,total nitrogen and total phosphorus increased from upstream to downstream.It was found that the stability of water quality was easily affected by industrial sewage,livestock and poultry breeding,river sewage outlets,and sludge deposition.It is necessary to strengthen the investigation of sewage outlets,improve the governance engineering system,promote agricultural pollution prevention,strengthen risk source control,improve early warning system and regular evaluation.

关 键 词：水质 底泥 空间分布 症结分析 青弋江 

分 类 号：X824[环境科学与工程—环境工程]