水体热分层对万峰湖水环境的影响  

Impacts of seasonal thermal stratification on the water environment of Wanfeng Lake

作　　者：邱华北[1,2] 商立海[2] 李秋华[2,3] 李广辉[2] 冯新斌[2] 

机构地区：[1]西南大学资源与环境学院,重庆北碚400715 [2]中国科学院地球化学研究所环境地球化学国家重点实验室,贵阳550002 [3]贵州师范大学贵州省山地环境信息系统和生态环境保护重点实验室,贵阳550001

出　　处：《生态学杂志》2011年第5期1039-1044,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(40873085和40973083);贵州省自然科学基金项目(黔科合J字[2007]2168号)资助

摘　　要：2009年9月（秋季）和2010年1月（冬季）对南盘江流域峡谷型水库——万峰湖的水温和水化学（DO、pH、总磷）进行监测,结果表明：万峰湖水体在秋、冬季节均存在明显分层,秋季,水体分为3层,0~10 m为混匀层,10~50 m为斜温层,50 m以下为滞水层,这种温度分层阻止了水的对流混合,引起显著的水化学分层,形成底部厌氧层。冬季,水温下降,在水下50 m左右分层,表层随深度增加水温下降,下层为滞水层,水温较为均匀。相关性分析表明,万峰湖在2009年9月（秋季）和2010年1月（冬季）水温和DO、pH、总磷之间均为极显著相关,水化学分层与温度分层同步。The water temperature and hydrochemical parameters during September 2009 and January 2010 of Wanfeng Lake in Guizhou Province were surveyed.A clear thermal stratification was found at the vertical profile of water column in autumn and winter.In autumn,a double thermocline appeared,which effectively limited the convective mixing of upper,intermediate and bottom of the layer water,caused water and water chemistry layed significantly.In winter,with the decreasing temperature of upper layer water,because the subsidence of the upper water due to the density changing,the water stratified structure changed,and convection exchange appeared between the upper and the bottom water,so the reducing matter released by anaerobic digestion was brought into the upper layer water.Seasonal thermal stratification played an important role in water quality and environmental change of Wanfeng Lake.Correlation analysis shows that,in Wanfeng Lake,the water temperature was significantly correlated with hydrochemical parameters（DO,pH,and total phosphorus） in September of 2009 and January of 2010,thus water chemistry layered with the temperature stratification synchronization.

关 键 词：万峰湖 水温分层 水质 空间分布 

分 类 号：P342[天文地球—水文科学]