水科学进展2018，Vol.29Issue(1)：73-79,7.DOI:10.14042/j.cnki.32.1309.2018.01.009
水库运行对漫湾库区洲滩水热交换影响
Influence of reservoir operation on water and heat exchange in the Manwan's island
摘要
Abstract
This study investigated the effects of water fluctuations induced by reservoir operations on hyporheic exchanges in an island in Manwan Reservoir of Langcan River.In-situ measurements of water level and temperature were conducted synchronously in the study area.The lateral hyporheic exchange flux was calculated,and the relationship between water temperature and water level was established.The dissolved oxygen and soluble carbon were also analysed along the hyporheic flow path.Results showed that periodic fluctuations of water level due to reservoir operations enhanced lateral hyporheic exchange in the island.The maximum variation of water level was 2.2 m,and the amount of water flowing in and out of the island reached 3 956 m3 during one filling-releasing cycle.The water exchange at the edge of the island was 4 to 5 times higher than that at the island centre.During water level rising,water temperature in island decreased and the temperature gradient was larger at the middle-bottom layer;while during water level falling,water temperature in island increased and the temperature gradient was larger in the upper-middle layer.The contents of dissolved oxygen,dissolved organic carbon and inorganic carbon decreased from 3.27 mg/L,7.3 mg/L,66.0 mg/L to 0.17 mg/L,2.4 mg/L and 40.6 mg/L along the hyporheic flow path from reservoir to island,respectively.These results indicated that reservoir operations could enhance hyporheic exchange between reservoir and island,which imposed potential influences on the biogeochemical cycle of elements in the river.关键词
水库运行/洲滩/潜流交换/水位/水温Key words
reservoir operation/reservoir island/hyporheic exchange/water level/water temperature分类
建筑与水利引用本文复制引用
姬雨雨,陈求稳,施文卿,易齐涛,林育青..水库运行对漫湾库区洲滩水热交换影响[J].水科学进展,2018,29(1):73-79,7.基金项目
国家自然科学基金资助项目(91547206 （）
51425902)The study is financially supported by the National Natural Science Foundation of China (No.91547206 （）
No.51425902). （）
