本文關(guān)鍵詞： 水溫 三峽工程 宜昌—監(jiān)利河段 一維模型 平坦化 延遲　出處：《水科學(xué)進(jìn)展》2016年04期 　論文類(lèi)型：期刊論文

【摘要】：三峽工程蓄水使得下游長(zhǎng)江河道水溫情勢(shì)發(fā)生顯著變化,并對(duì)下游生態(tài)環(huán)境產(chǎn)生重要影響�；谝瞬恼�14年的實(shí)測(cè)資料,采用縱向一維水溫模型模擬分析了宜昌至監(jiān)利300 km河道水溫變化過(guò)程,探討了不同蓄水期三峽工程下泄水溫變化對(duì)壩下魚(yú)類(lèi)產(chǎn)卵場(chǎng)的影響程度。結(jié)果表明:1三峽工程蓄水后宜昌斷面水溫出現(xiàn)了平坦化及延遲現(xiàn)象,低溫水和高溫水效應(yīng)明顯;175 m蓄水期宜昌斷面4月、12月,水溫分別較蓄水前改變-4.3℃、3.7℃。2三峽工程的運(yùn)行使得下游河道水氣熱交換量發(fā)生變化,但干流流量較大使得水溫沿程恢復(fù)效果較弱;工程調(diào)蓄對(duì)壩下河段的影響占主導(dǎo)作用,三峽工程調(diào)蓄對(duì)監(jiān)利斷面4月、12月存在-3.2℃、3.0℃的溫度影響。3三峽工程蓄水后,宜昌中華鱘產(chǎn)卵場(chǎng)冬季20.0℃的水溫出現(xiàn)時(shí)間推遲1~4旬,監(jiān)利四大家魚(yú)產(chǎn)卵場(chǎng)春季18.0℃的水溫出現(xiàn)時(shí)間推遲1~3旬,并隨著蓄水位的抬升,推遲幅度逐漸加大。
[Abstract]:The storage of water in the three Gorges Project makes the water temperature of the lower reaches of the Yangtze River significantly change and has an important impact on the ecological environment of the lower reaches. Based on the measured data of Yichang Hydrologic Station for 14 years, The variation process of water temperature in 300km channel from Yichang to Jianli is simulated and analyzed by using longitudinal one-dimensional water temperature model. In this paper, the influence of the temperature variation of the three Gorges Project under the dam on the spawning site of fish is discussed. The results show that the water temperature of Yichang section has been flattened and delayed after the water storage of the three Gorges Project. The effects of low temperature water and high temperature water on the Yichang section during the storage period of 175m in April and December respectively. The water temperature changes from -4.3 鈩，

本文編號(hào)：1549815