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

【摘要】：丹江口水庫作為南水北調(diào)中線工程的水源地,其重要性可想而知,水庫中的水資源承擔(dān)了北京、天津、河北、河南這四個省市的用水需求。所以其水質(zhì)狀況便是關(guān)乎民生的重中之重,必須時刻確保水庫中的水質(zhì)安全。我國水污染問題是影響當(dāng)前國家水安全的一個重要因素。所以為了更好的了解和把握其水動力學(xué)及水質(zhì)情況,本文首先對水質(zhì)模型的國內(nèi)外研究進(jìn)展進(jìn)行了介紹,又對丹江口水庫的自然地理情況(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)境問題做出了闡述。并且對丹江口水庫使用多種方法進(jìn)行了中長期的徑流預(yù)報,對預(yù)報結(jié)果進(jìn)行分析評價。之后本文基于EFDC模型對丹江口水庫建立數(shù)值模擬模型,并用2012年的數(shù)據(jù)來模擬水動力學(xué)和水質(zhì),分別模擬了水位、水溫、葉綠素a、藻類、總氮以及總磷,并用實測與模擬對比分析。其中水位模擬與實測值對比的誤差僅為38cm,效果比較好。由于丹江口水庫是大型水庫,所以對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,秋季會出現(xiàn)垂直方向的摻混作用,分層現(xiàn)象會因此減弱,到了冬季水體分層現(xiàn)象消失。水質(zhì)模擬時本文選用了葉綠素a、藻類、總氮、總磷這三個常用指標(biāo)進(jìn)行研究。丹江口水庫的富營養(yǎng)化程度較高,P成為藻類生長的限制性因素,可采取措施控制丹江口水庫總磷濃度來限制藻類生長。葉綠素a濃度的變化趨勢和總氮相反,當(dāng)總氮濃度升高時,葉綠素a濃度降低,反之亦然。最后簡要介紹了基于EFDC模型自主開發(fā)的丹江口水庫三維水動力學(xué)和水質(zhì)模型系統(tǒng),并以丹江口水庫庫區(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】：中國水利水電科學(xué)研究院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：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：2092821