摘要
兴凯湖是中俄跨境湖泊,其水质变化受到国际社会的高度关注,入湖河流水质状况对兴凯湖水质有着重要影响。以兴凯湖中国境内流域为研究区域,基于内梅罗污染指数法、方差分析、冗余分析、聚类分析等方法,分析兴凯湖入湖河流水质污染特征,探究流域土地利用结构对河流水质的影响,并据此提出入湖河流分类修复策略。结果表明:兴凯湖入湖河流水质为GB3838—2002《地表水环境质量标准》Ⅲ类~劣Ⅴ类,化学需氧量、总磷、高锰酸盐指数是主要超标因子;兴凯湖入湖河流丰水期水质整体优于平水期,大兴凯湖入湖河流水质整体优于小兴凯湖;兴凯湖流域土地利用对入湖河流水质的解释度在丰水期和平水期分别为52.31%和45.38%,耕地对河流水质产生负面影响,林地、水体对入湖河流水质起改善作用,而人造地表、草地在不同水期对入湖河流水质的影响不同。基于入湖河流水质、流域土地利用结构的聚类分析,将兴凯湖入湖河流分为生态保育型、生态修复型和综合治理型3种类型,并提出了具有针对性的治理与修复策略。
Xingkai Lake is a cross-border lake between China and Russia,and its water quality change has received high attention from the international community.The water quality of rivers flowing into the lake has an important impact on the water quality of Xingkai Lake.Taking Xingkai Lake basin in China as the research area,based on Nemero pollution index method,variance analysis,redundancy analysis and cluster analysis,the water quality characteristics of the rivers flowing into Xingkai Lake were analyzed,and the impact of land use structure on the river water quality was explored.Classified repair strategies were also proposed accordingly.The results showed that the water quality categories of rivers flowing into Xingkai Lake were ClassⅢto ClassⅤor below ClassⅤof Environmental Quality Standards for Surface Water(GB 3838-2002).Chemical oxygen demand,total phosphorus and permanganate index were the main factors exceeding the standard.The water quality of rivers flowing into Xingkai Lake in high flow period was better than that in normal flow period.The water quality of the rivers flowing into Great Xingkai Lake was better than that of the rivers flowing into Small Xingkai Lake.The explanatory degree of land use in Xingkai Lake basin on the water quality of rivers flowing into the lake reached 52.31%and 45.38%during the high and normal flow periods,respectively.Cultivated land had a negative impact on the water quality of the rivers.Forest land and water body had an improvement effect,while artificial surface and grassland had different impacts in different water periods.Based on the cluster analysis of water quality and land use structure,the rivers flowing into Xingkai Lake were divided into three types,i.e.ecological conservation type,ecological restoration type and comprehensive treatment type,and targeted treatment and repair strategies were proposed.
作者
徐宜雪
谢自建
王昊
李春华
李季
魏伟伟
郑烨
叶春
XU Yixue;XIE Zijian;WANG Hao;LI Chunhua;LI Ji;WEI Weiwei;ZHENG Ye;YE Chun(National Engineering Laboratory for Lake Pollution Control and Ecological Restoration,Chinese Research Academy of Environmental Sciences;Jixi Bureau of Ecology and Environment)
出处
《环境工程技术学报》
CAS
CSCD
北大核心
2023年第6期1997-2005,共9页
Journal of Environmental Engineering Technology
基金
水污染防治中央储备库项目“兴凯湖流域生态环境调查项目”。
关键词
兴凯湖
入湖河流
水质
土地利用
生态修复
Xingkai Lake
inflow river
water quality
land use
ecological restoration
