本文選題：丹江口水庫(kù) + 中長(zhǎng)期徑流預(yù)報(bào)　； 參考：《中國(guó)水利水電科學(xué)研究院》2015年碩士論文

【摘要】：丹江口水庫(kù)作為南水北調(diào)中線工程的水源地,其重要性可想而知,水庫(kù)中的水資源承擔(dān)了北京、天津、河北、河南這四個(gè)省市的用水需求。所以其水質(zhì)狀況便是關(guān)乎民生的重中之重,必須時(shí)刻確保水庫(kù)中的水質(zhì)安全。我國(guó)水污染問(wèn)題是影響當(dāng)前國(guó)家水安全的一個(gè)重要因素。所以為了更好的了解和把握其水動(dòng)力學(xué)及水質(zhì)情況,本文首先對(duì)水質(zhì)模型的國(guó)內(nèi)外研究進(jìn)展進(jìn)行了介紹,又對(duì)丹江口水庫(kù)的自然地理情況(包括氣候、植被、土壤等)、暴雨特性、洪水特性、徑流特性以及目前所存在的水質(zhì)水環(huán)境問(wèn)題做出了闡述。并且對(duì)丹江口水庫(kù)使用多種方法進(jìn)行了中長(zhǎng)期的徑流預(yù)報(bào),對(duì)預(yù)報(bào)結(jié)果進(jìn)行分析評(píng)價(jià)。之后本文基于EFDC模型對(duì)丹江口水庫(kù)建立數(shù)值模擬模型,并用2012年的數(shù)據(jù)來(lái)模擬水動(dòng)力學(xué)和水質(zhì),分別模擬了水位、水溫、葉綠素a、藻類(lèi)、總氮以及總磷,并用實(shí)測(cè)與模擬對(duì)比分析。其中水位模擬與實(shí)測(cè)值對(duì)比的誤差僅為38cm,效果比較好。由于丹江口水庫(kù)是大型水庫(kù),所以對(duì)于水溫的模擬要把握好水溫分層的現(xiàn)象,尤其在夏季最為明顯,秋季會(huì)出現(xiàn)垂直方向的摻混作用,分層現(xiàn)象會(huì)因此減弱,到了冬季水體分層現(xiàn)象消失。水質(zhì)模擬時(shí)本文選用了葉綠素a、藻類(lèi)、總氮、總磷這三個(gè)常用指標(biāo)進(jìn)行研究。丹江口水庫(kù)的富營(yíng)養(yǎng)化程度較高,P成為藻類(lèi)生長(zhǎng)的限制性因素,可采取措施控制丹江口水庫(kù)總磷濃度來(lái)限制藻類(lèi)生長(zhǎng)。葉綠素a濃度的變化趨勢(shì)和總氮相反,當(dāng)總氮濃度升高時(shí),葉綠素a濃度降低,反之亦然。最后簡(jiǎn)要介紹了基于EFDC模型自主開(kāi)發(fā)的丹江口水庫(kù)三維水動(dòng)力學(xué)和水質(zhì)模型系統(tǒng),并以丹江口水庫(kù)庫(kù)區(qū)為例進(jìn)行建模及演示。
[Abstract]:Danjiangkou Reservoir, as the water source of the South-to-North Water transfer Project, its importance can be imagined that the water resources in the reservoir bear the water demand of Beijing, Tianjin, Hebei and Henan provinces and cities. Therefore, its water quality is the most important issue for people's livelihood. It must always ensure the safety of water quality in reservoirs. Water pollution is an important factor affecting the water safety of our country. Therefore, in order to better understand and grasp its hydrodynamics and water quality, this paper first introduces the research progress of water quality model at home and abroad, and then introduces the natural geographical situation of Danjiangkou Reservoir (including climate, vegetation, vegetation). The characteristics of rainstorm, flood, runoff and the existing problems of water quality and water environment are discussed. The middle and long term runoff forecast of Danjiangkou reservoir is carried out with various methods, and the forecast results are analyzed and evaluated. Then, based on the EFDC model, a numerical simulation model of Danjiangkou reservoir was established, and the hydrodynamics and water quality were simulated with the data of 2012. The water level, water temperature, chlorophyll a, algae, total nitrogen and total phosphorus were simulated, respectively. The experiment and simulation are compared and analyzed. The error of comparison between the simulated and measured water level is only 38 cm, and the effect is good. As the Danjiangkou reservoir is a large reservoir, the simulation of water temperature should grasp the phenomenon of water temperature stratification, especially in summer, the vertical mixing will occur in autumn, and the stratification phenomenon will be weakened. The phenomenon of water stratification disappeared in winter. Chlorophyll a, algae, total nitrogen and total phosphorus were used in water quality simulation. The high eutrophication degree of Danjiangkou reservoir becomes the restrictive factor of algae growth. Measures can be taken to control the total phosphorus concentration of Danjiangkou reservoir to limit algae growth. The change trend of chlorophyll a concentration was opposite to that of total nitrogen. When the total nitrogen concentration increased, the chlorophyll a concentration decreased, and vice versa. In the end, the 3D hydrodynamics and water quality model system of Danjiangkou reservoir based on EFDC model is briefly introduced, and the model and demonstration of Danjiangkou reservoir area is given as an example.
【學(xué)位授予單位】：中國(guó)水利水電科學(xué)研究院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TV697.2;TV124

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相關(guān)期刊論文 前1條

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本文編號(hào)：2092821