本文關鍵詞： 地下水與河水相互作用 地下水溫度模擬 彎曲河流 溫度示蹤法　出處：《長安大學》2015年碩士論文　論文類型：學位論文

【摘要】：彎曲河流地下水與河水相互作用強烈,研究彎曲河流地下水與河水的相互關系,有助于深入了解地下水與河水的補排關系,為傍河取水、污染物運移的研究提供科學依據(jù)。本論文采用溫度示蹤法研究彎曲河流河水與地下水的關系,用溫度示蹤具有測量方法簡單、成本低、能夠進行連續(xù)觀測等優(yōu)點。同時地下水溫度分布特征能夠很好的反映出河水與地下水不同的補排關系。以渭河臨潼段為試驗點,測量彎曲河流不同觀測點位置不同埋深處地下水水位及溫度,分析地下水與河水的補排關系及溫度分布特征。參照渭河臨潼段試驗點的水文地質條件,建立理想模型。根據(jù)模擬結果,分析彎曲河流不同位置處地下水與河水相互作用的關系,及地下水溫度場的分布特征。研究內容及研究結論如下:1)當河水水溫隨時間周期性變化時,地下水溫度也發(fā)生周期性變化。在地下水補給河水的區(qū)域,地下水溫度隨河水溫度周期性變化幅度小,而在河水補給地下水的區(qū)域,地下水溫度隨河水溫度周期性變化幅度大,在時間上,地下水溫度變化滯后于河水溫度變化。2)埋深較淺的地下水,在水平方向上距離河流越近,地下水溫度與河水溫度越接近,距離河流越遠,地下水溫度與河水溫度差別越大。在垂向上,地下水埋深越淺,地下水溫度與河水溫度越接近,地下水埋深越大,地下水溫度與河水溫度差別越大。在地下水補給河水的地方,等溫線密集,溫度梯度大,河水對地下水溫度變化影響有限;在河水補給地下水的地方,等溫線稀疏,溫度梯度小,地下水溫度受河水溫度變化影響大,影響距離遠。3)滲透系數(shù)對地下水溫度場分布有重要影響。不同的位置處,滲透系數(shù)變化對地下水溫度分布影響不同。在地下水補給河水的地方,地下水溫度與河水溫度差別大,地下水溫度場變化受滲透系數(shù)變化影響小;在河水補給地下水的地方,地下水溫度與河水溫度接近,地下水溫度場變化受滲透系數(shù)變化影響大。4)河流上下游水位差變化對地下水溫度場的影響與滲透系數(shù)改變對地下水溫度場的影響一致,都是通過影響地下水流速,進而影響地下水溫度場。
[Abstract]:Bend River groundwater and river water interaction is strong, the relationship between bending River groundwater and river water, contribute to a deeper understanding of the relationship between groundwater and river water supply and drainage, water is near the river, to provide scientific basis for the study of the relationship between pollutant transport. The temperature of river meandering river and groundwater tracer, tracer with temperature the method is simple, low cost, can carry out continuous observation and so on. At the same time the distribution characteristics of groundwater temperature can well reflect the relationship between river and groundwater in different row up. In the Weihe section of Lintong was conducted at different observation points position measuring curved river different depth of groundwater level and temperature, analysis of groundwater and river water supply and drainage the relationship between temperature and distribution. According to the hydrogeological conditions of Weihe Lintong test section of the establishment of an ideal model. According to the simulation results, analysis of river bend Flow between different positions of interaction between stream and groundwater, and groundwater temperature field distribution characteristics. The research contents and research conclusion are as follows: 1) when the water temperature changing with time, the temperature of groundwater also changed periodically. In the area of groundwater recharge, groundwater temperature with small amplitude periodic variation of river water temperature however, in the area of river water recharge groundwater, groundwater temperature with water temperature periodic variation, in time, the temperature of groundwater change lags behind the change of river water temperature.2) shallow groundwater, in the horizontal direction from the river near the groundwater temperature is close to the water temperature, far from the river, the difference the temperature of groundwater and river water temperature is high. In the vertical, the shallower groundwater table, groundwater and river water temperature is close to the temperature, the greater the depth of groundwater, underground water temperature and water temperature The greater the difference in degree of groundwater recharge the river where the isotherms intensive, large temperature gradient, the influence of temperature change on groundwater recharge of groundwater in the river; where the temperature gradient is small, sparse isotherm, the temperature of groundwater from the influence of temperature change, influence of distance.3) permeability coefficient has an important effect on groundwater temperature field distribution at different positions, the permeability coefficient changes affect the distribution of temperature in different groundwater. Groundwater recharge of river water, groundwater and river water temperature, temperature difference, water temperature changes due to variation of permeability coefficient has little influence on the local groundwater recharge; river water, groundwater and river water temperature close to the temperature, the water temperature change of permeability coefficient the change of.4) river water level change on groundwater temperature field and the permeability coefficient change on groundwater temperature field. The noise is consistent, all of which affect the groundwater flow velocity, and then influence the temperature field of the groundwater.

【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P641.2;P339

【參考文獻】

相關期刊論文 前4條

1 錢會,鄭西來,樊秀峰;傍河取水越河穩(wěn)定滲流問題的三維數(shù)值模擬研究[J];水利學報;1999年03期

2 葛建;;分布式光纖測溫系統(tǒng)在探測堤壩滲漏中的應用[J];中國水利;2008年12期

3 黃麗;鄭春苗;劉杰;肖洪浪;;分布式光纖測溫技術在黑河中游地表水與地下水轉換研究中的應用[J];水文地質工程地質;2012年02期

4 董海洲,陳建生;利用溫度示蹤方法探測基坑滲漏[J];巖石力學與工程學報;2004年12期

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本文編號：1495979