基于EFDC的丹江口水庫水環(huán)境數(shù)值模擬分析
發(fā)布時間：2019-06-15 17:12
【摘要】：對于湖庫區(qū)水環(huán)境狀況進行合理的分析與評價進而對其有效的治理對于保證社會經(jīng)濟持續(xù)健康穩(wěn)定的發(fā)展起到至關重要的作用。丹江口水庫作為南水北調中線工程的水源地，其水質狀況達標與否關系到輸水干線沿線居民的身體健康。本文選取丹江口水庫作為研究對象，利用目前被廣泛使用的環(huán)境流體動力學模型EFDC，對丹江口水庫2012年水動力及水質情況進行模擬，并依據(jù)模擬結果分析了其水動力及水質變化規(guī)律。 本文首先介紹了水環(huán)境模擬的國內外研究情況以及水環(huán)境研究發(fā)展的新趨勢，，闡述了丹江口水庫的自然地理狀況和目前所存在的水環(huán)境問題。之后針對本次模擬所采用的核心算法EFDC，對其算法原理和組成結構進行詳細介紹。并根據(jù)其輸入輸出結構建立了符合用戶使用習慣的前后處理程序，搭建起適于湖庫區(qū)的三維水生態(tài)系統(tǒng)。建立了丹江口水庫的三維水動力學及水質模型。其中水位模擬情況較好，與實測值相比誤差僅為0.1%。對于水溫的模擬很好的把握了丹江口水庫水溫分層這一現(xiàn)象，這種現(xiàn)象在夏季表現(xiàn)最為明顯，秋季由于垂向摻混作用使得分層現(xiàn)象減弱，到了冬季水體完全混合，分層現(xiàn)象消失。根據(jù)流場分布圖表明丹江口水庫出現(xiàn)由于紊流作用而形成的渦旋，并且流速呈兩頭大，中間小的格局，上層水流速度受到風速影響較大。 本文選用溶解氧、氨氮、總氮、總磷等常用指標作為研究對象。模擬結果表明：溶解氧濃度受溫度影響較大，成明顯反比趨勢，夏季含量低冬季含量高，且同時存在分層現(xiàn)象，表層高于底層。氨氮也同樣具備季節(jié)性周期變化及分層現(xiàn)象。對于總氮來講影響其變化的因素主要是庫區(qū)藻類生長及外源水體匯入。 最后利用多元回歸分析的方法分別對影響溶解氧和氨氮濃度的因素進行計算，得出影響因素的大小排序，利用參數(shù)敏感度分析得出了影響氨氮濃度因素的參數(shù)。
[Abstract]:Reasonable analysis and evaluation of the water environment in the lake reservoir area and its effective management play an important role in ensuring the sustained, healthy and stable development of the social economy. Danjiangkou Reservoir, as the water source of the middle route of South-to-North Water transfer Project, whether its water quality is up to standard or not is related to the health of the residents along the main line of water transmission. In this paper, Danjiangkou Reservoir is selected as the research object, and the hydrodynamic and water quality of Danjiangkou Reservoir in 2012 are simulated by using the environmental hydrodynamic model EFDC, which is widely used at present, and the hydrodynamic force and water quality of Danjiangkou Reservoir are analyzed according to the simulation results. This paper first introduces the research situation of water environment simulation at home and abroad and the new trend of water environment research and development, and expounds the natural geographical situation of Danjiangkou Reservoir and the existing water environment problems at present. Then the principle and structure of the algorithm are introduced in detail according to the core algorithm EFDC, used in this simulation. According to its input and output structure, a pre-and post-processing program in accordance with the user's habits is established, and a three-dimensional water ecosystem suitable for the lake reservoir area is built. The three-dimensional hydrodynamics and water quality model of Danjiangkou Reservoir are established. The simulation of water level is better, and the error is only 0.1% compared with the measured value. The phenomenon of water temperature stratification in Danjiangkou Reservoir is well grasped by the simulation of water temperature, which is the most obvious in summer. Due to the vertical mixing in autumn, the stratification phenomenon is weakened, and the stratification phenomenon disappears when the water body is completely mixed in winter. According to the flow field distribution map, the vortex formed by turbulence occurs in Danjiangkou Reservoir, and the velocity is large at both ends and small in the middle, and the upper flow velocity is greatly affected by wind speed. In this paper, dissolved oxygen, ammonia nitrogen, total phosphorus and other common indicators are selected as the research object. The simulation results show that the dissolved oxygen concentration is greatly affected by temperature, and the content of dissolved oxygen is obviously inversely proportional. The content of dissolved oxygen is low in summer and high in winter, and there is stratification phenomenon at the same time, and the surface layer is higher than the bottom layer. Ammonia nitrogen also has seasonal periodic variation and stratification phenomenon. For total nitrogen, the main factors affecting the change are algae growth and exogenous water inflow in the reservoir area. Finally, the factors that affect the concentration of dissolved oxygen and ammonia nitrogen are calculated by multiple regression analysis, and the order of the influencing factors is obtained, and the parameters of the factors affecting the concentration of ammonia nitrogen are obtained by parameter sensitivity analysis.
【學位授予單位】：中國地質大學（北京）
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TV697.2;X143
本文編號：2500377
[Abstract]:Reasonable analysis and evaluation of the water environment in the lake reservoir area and its effective management play an important role in ensuring the sustained, healthy and stable development of the social economy. Danjiangkou Reservoir, as the water source of the middle route of South-to-North Water transfer Project, whether its water quality is up to standard or not is related to the health of the residents along the main line of water transmission. In this paper, Danjiangkou Reservoir is selected as the research object, and the hydrodynamic and water quality of Danjiangkou Reservoir in 2012 are simulated by using the environmental hydrodynamic model EFDC, which is widely used at present, and the hydrodynamic force and water quality of Danjiangkou Reservoir are analyzed according to the simulation results. This paper first introduces the research situation of water environment simulation at home and abroad and the new trend of water environment research and development, and expounds the natural geographical situation of Danjiangkou Reservoir and the existing water environment problems at present. Then the principle and structure of the algorithm are introduced in detail according to the core algorithm EFDC, used in this simulation. According to its input and output structure, a pre-and post-processing program in accordance with the user's habits is established, and a three-dimensional water ecosystem suitable for the lake reservoir area is built. The three-dimensional hydrodynamics and water quality model of Danjiangkou Reservoir are established. The simulation of water level is better, and the error is only 0.1% compared with the measured value. The phenomenon of water temperature stratification in Danjiangkou Reservoir is well grasped by the simulation of water temperature, which is the most obvious in summer. Due to the vertical mixing in autumn, the stratification phenomenon is weakened, and the stratification phenomenon disappears when the water body is completely mixed in winter. According to the flow field distribution map, the vortex formed by turbulence occurs in Danjiangkou Reservoir, and the velocity is large at both ends and small in the middle, and the upper flow velocity is greatly affected by wind speed. In this paper, dissolved oxygen, ammonia nitrogen, total phosphorus and other common indicators are selected as the research object. The simulation results show that the dissolved oxygen concentration is greatly affected by temperature, and the content of dissolved oxygen is obviously inversely proportional. The content of dissolved oxygen is low in summer and high in winter, and there is stratification phenomenon at the same time, and the surface layer is higher than the bottom layer. Ammonia nitrogen also has seasonal periodic variation and stratification phenomenon. For total nitrogen, the main factors affecting the change are algae growth and exogenous water inflow in the reservoir area. Finally, the factors that affect the concentration of dissolved oxygen and ammonia nitrogen are calculated by multiple regression analysis, and the order of the influencing factors is obtained, and the parameters of the factors affecting the concentration of ammonia nitrogen are obtained by parameter sensitivity analysis.
【學位授予單位】：中國地質大學（北京）
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TV697.2;X143
【參考文獻】
相關期刊論文 前10條
1 田煒;王平;謝nI;陳偉;;地表水質模型應用研究現(xiàn)狀與趨勢[J];現(xiàn)代農業(yè)科技;2008年03期
2 李仁東,李勁峰,黃進良,郭輝;南水北調對湖北丹江口水庫區(qū)土地資源的影響[J];長江流域資源與環(huán)境;1998年02期
3 李勝;梁忠民;;GLUE方法分析新安江模型參數(shù)不確定性的應用研究[J];東北水利水電;2006年02期
4 宋國強;殷明;張文漫;張鶯;;十堰市入庫總氮對丹江口水庫總氮濃度貢獻的初步估算[J];環(huán)境科學與技術;2006年S1期
5 葉常明;水環(huán)境數(shù)學模型的研究進展[J];環(huán)境科學進展;1993年01期
6 郭勁松,霍國友,龍騰銳;BOD-DO耦合人工神經(jīng)網(wǎng)絡水質模擬的研究[J];環(huán)境科學學報;2001年02期
7 史鐵錘;王飛兒;方曉波;;基于WASP的湖州市環(huán)太湖河網(wǎng)區(qū)水質管理模式[J];環(huán)境科學學報;2010年03期
8 黃國如;解河海;;基于GLUE方法的流域水文模型的不確定性分析[J];華南理工大學學報(自然科學版);2007年03期
9 陳燕;郭志勇;單偉;;丹江口庫區(qū)氣候變化及對生態(tài)環(huán)境的影響[J];河南氣象;2006年04期
10 郭勁松,李勝海,龍騰銳;水質模型及其應用研究進展[J];重慶建筑大學學報;2002年02期
相關博士學位論文 前1條
1 王宇暉;基于分布式水文模型的流域水循環(huán)及面源伴生過程模擬研究與應用[D];東華大學;2012年
本文編號：2500377
本文鏈接：http://sikaile.net/kejilunwen/shuiwenshuili/2500377.html
最近更新
教材專著
