摘要
在掌握青岛市王圈水库自然地理的基础上,于2011年7、8、9、11月对水库水质和底质进行了动态监测。结果表明:(1)王圈水库水温垂向分布受水深和季节的控制。在水深大于8m的区域,夏季水温逐渐分层,到8月中旬,在水深8m处形成温跃层,此时上层处于富氧状态,而温跃层以下溶解氧迅速减小。秋季水温分层消失,水库水体为富氧状态,溶解氧为8mg/L左右。在水深小于8m的区域,全年水温不分层,溶解氧垂向分布均匀。(2)王圈水库主要入库河流中可溶性锰均未超标而库底沉积物中富含锰,反映出沉积物内源释放是水库锰污染的主要来源。水库水深大于8m的区域,夏季随着温跃层的形成,温跃层以下由氧化状态变为还原状态,沉积物锰大量释放,最高可达1.28mg/L;到秋季,水温分层消失,下层恢复成氧化状态,抑制了锰的释放。其他区域全年处于氧化状态,没有形成锰污染。
Base on the full grasp of natural geographical overview of Wangquan Reservoir,Qingdao,water quali- ty and sediment quality was monitored dynamically in July, August, September and November, 2011. The results showed that temperature stratification of reservoir changed with different seasons in different parts of reservoir. In the areas where water depths were greater than 8 m,temperature stratification started in summer and the thermocline was formed in mid-August;water above the thermocline was in oxygen-rich condition, while DO decreased rapidly blew the thermocline, temperature stratification disappeared after fall,the concentration of DO was about 8 mg/L. In other are- as, there was no temperature stratification and water was always oxygen-enriched;the concentration of soluble manga- nese of tributary inflow was low whereas sediment was full of manganese,it reflected the main reason of manganese pollution was internal release;the water more than 8 m deep was changed from oxidation status into reduction status as the thermocline formed in summer. Manganese was released largely from sediment with the maximum concentration was up to 1.28 mg/L. The release of manganese was restrained after fall because temperature stratification was disap peared and water was in oxidation state. There was no manganese pollution found in area of water depth lower than 8 m,hecause the water was in oxidation state all the year.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2012年第11期68-73,共6页
Environmental Pollution & Control
关键词
青岛市
水库
锰污染
水温
内源释放
Qingdao
reservoir
manganese pollution
water temperature
internal release
