水利学报2019，Vol.50Issue(4)：497-505,9.DOI:10.13243/j.cnki.slxb.20181142
漫湾水库运行下库内洲滩潜流带夏季热传输特征
Study on heat transfer across island riparian zone under Manwan reservoir operations in summer
摘要
Abstract
In this study, water level and temperature in the riparian zone were in-situ monitored for 49 days in summer using automatic sensors on an island of Manwan reservoir in the Langcang River. Through the analysis of the lateral hyporheic exchanges and temperature spatial-temporal patterns in the riparian zone, the heat transfer quantities across the riparian zone were calculated, which is helpful to reveal the riparian heat transfer in summer under Manwan reservoir operations and the underlying mechanisms. The results demonstrate that due to the reservoir operation the frequent fluctuation of water level promotes the hyporheic exchanges between the island and reservoir with exchange volume per unit length across the island up to-0.12 ～ 0.06 m2/d. Under the solar radiation, the island sediments is heating up faster because of its specific heat lower than water, that forms the difference in temperature of 0.26 ℃ ～ 4.80 ℃ higher than the water in reservoir. Driven by the hyporheic flow, heat is transferred from the island to the reservoir.The heat transfer quantity is following the order of upper layer> middle layer> bottom layer, with1635.21 MJ, 730.68 MJ and 104.49 MJ per unit area, respectively. Sensitivity analyses show that the heat transfer is most affected by amplitude of water fluctuation, followed by the temperature difference and least affected by the fluctuation period. This study is beneficial to the studies of heat and water exchanges in riparian zones in dammed rivers.关键词
水库运行/潜流带/潜流交换/热量传输/敏感性分析Key words
reservoir operation/riparian zone/hyporheic exchange/heat transfer/sensitivity analysis分类
资源环境引用本文复制引用
于丹青,陈求稳,马宏海,陈宇琛,孙洪波,施文卿..漫湾水库运行下库内洲滩潜流带夏季热传输特征[J].水利学报,2019,50(4):497-505,9.基金项目
国家自然科学基金项目(91547206,51709182,51709181) （91547206,51709182,51709181）
中央级公益性科研院所基本科研业务费专项资金项目(Y918018) （Y918018）
国家水体污染控制与治理科技重大专项(2017zx07603-004,2017zx07603-005) （2017zx07603-004,2017zx07603-005）
