【摘要】：水溫是水環(huán)境評(píng)價(jià)的重要因子之一,其對(duì)水生態(tài)系統(tǒng)中的物理、化學(xué)和生物過(guò)程起著重要作用。為了分析向家壩水庫(kù)運(yùn)行期內(nèi)的水溫分布特征及其成因,本文建立CE-QUAL-W2立面二維水溫模型,并基于2014年野外原位監(jiān)測(cè)水溫?cái)?shù)據(jù)對(duì)模型可靠性進(jìn)行了驗(yàn)證,應(yīng)用其對(duì)水溫分布進(jìn)行數(shù)值模擬。研究發(fā)現(xiàn)向家壩水庫(kù)水溫存在季節(jié)性垂向分層,4~6月中上層水體(水深0~60 m)受入流水溫和氣溫回升影響迅速升溫,表底溫差達(dá)10℃,垂向分層加劇;7、8月水庫(kù)泄洪加快了庫(kù)區(qū)水體交換,底層水溫迅速升高,中間等溫層水體厚度增加,表底溫差減小在2℃內(nèi),9月以后表底溫差進(jìn)一步縮小,垂向水溫分層逐漸消失。通過(guò)分析發(fā)現(xiàn):氣象要素、入流水溫、電站取水口高程、泄洪方式成為影響向家壩水溫分布的主要因素。入流水溫的變化只影響水庫(kù)水溫波動(dòng)范圍,對(duì)其垂向分層結(jié)構(gòu)影響較低;表層水溫受氣象條件影響顯著;取水口高程和泄洪方式?jīng)Q定了水溫的垂向結(jié)構(gòu)。
[Abstract]:Water temperature is one of the important factors in water environment assessment, which plays an important role in the physical, chemical and biological processes of water ecosystem. In order to analyze the characteristics and causes of water temperature distribution in Xiangjiaba reservoir, a two-dimensional water temperature model with CE-QUAL-W2 elevation is established, and the reliability of the model is verified based on the in-situ monitoring of water temperature data in 2014. The distribution of water temperature is numerically simulated. It is found that the water temperature of Xiangjiaba Reservoir has seasonal vertical stratification from April to June (water depth of 0 ~ 60m), which is affected by the rising of inlet water temperature and temperature, and the surface temperature difference reaches 10 鈩，

本文編號(hào)：2213588