摘要
红枫湖和百花湖地处长江支流乌江水系猫跳河流域,位于黔中人为活动高强度地区,具低纬度-高海拔的地理区位;是河道型梯级开发的人工湖,具碳酸盐岩的地质背景、水寄宿时间小、水深变幅大、水体多功能、农区与覆水区镶嵌等重要特征。红枫湖表层沉积物Pb稳定同位素组成表明其污染具多源特征;剖析百花湖-红枫湖"突发性"水质恶化相互关联水质指标表明"湖泊黑潮"是特定季节、特殊气候条件下,沉积有机质生物氧化作用的耦合;脱氮过程受阻的pH控制导致亚硝酸根浓度增高;维护该湖泊水系环境质量需预防工业污染、流域侵蚀、生活污染并综合治理湖区。
Lakes Hongfeng and Baihua, artificial lakes, were located in the catchment of the Maotiao River, a branch of the Wujiang distributary of the Yangtze River with low altitude and high elevation. The area has been intensively intervened by human activities. The lake waters are characterized by short-term residence time, variable water depth and multiple-function services; their catchment is developed on a geological background of carbonate rocks, and mosaicked by lake water surface and agricul- tural land uses. The Pb stable isotopic composition of the upper sediments indicated that the lakes were contaminated by various sources of pollutants. Analysis of incident cross-correlation water-quality indicators for the paroxysmal deterioration of water quality in Lakes Baihua and Hongfeng, or ＂Lake Black Tide＂ as a ＂dead zone＂, indicated that the deterioration resulted from the coupling of bio-oxidation of depositional organic matter under certain seasonal and climatic conditions, pH-restraints of denitric processes led to an increase in NO^- concentrations. To maintain good lake water quality, it is necessary to take an inte- grated measure to manage the lakes, as well as to prevent polluttions from industry,livelihood, and watershed erosion.
出处
《地球与环境》
CAS
CSCD
北大核心
2010年第3期262-270,共9页
Earth and Environment
基金
国家自然科学基金资助(项目编号:40873086、40773071、49333040)
关键词
深水人工湖
沉积物-水界面
环境生物地球化学过程
红枫湖
百花湖
Lake Black Tide
deep artificial lake
sediment-water interface
environmental biogeoehemical process
Lakes Hongfeng and Baihua
