發(fā)布時(shí)間：2018-06-19 23:43

  本文選題：緩蓄快放系統(tǒng) + 城市景觀水體　； 參考：《西安理工大學(xué)》2017年碩士論文

【摘要】：近年來(lái)城市景觀水體越來(lái)越受到人們的青睞,因其具有觀賞、娛樂(lè)、調(diào)節(jié)微氣候的特點(diǎn),在城市建設(shè)中都有考慮到。但城市景觀水體由于水流緩慢、河道較寬、上游來(lái)水不足等原因,很容易受到污染,出現(xiàn)水質(zhì)惡化等問(wèn)題。不僅影響城市的美觀,而且?guī)Ыo周圍居民一些不便。對(duì)于這個(gè)問(wèn)題,雖然各級(jí)政府和部門都在努力解決,但是并沒(méi)有得出一個(gè)有效的方法。本文針對(duì)景觀水體的特點(diǎn),提出了一種新的改善和保持景觀水體的方法——緩蓄快放系統(tǒng)。來(lái)改善城市景觀水體的水質(zhì)。并以西安護(hù)城河為原型,通過(guò)理論計(jì)算、物理模型試驗(yàn)?zāi)�擬、軟件模擬分析緩蓄快放系統(tǒng)前后河道的水力學(xué)要素狀況,分析了緩蓄快放系統(tǒng)對(duì)河道的影響。研究成果對(duì)緩解水環(huán)境嚴(yán)峻形勢(shì)和維持水生態(tài)系統(tǒng)平衡具有重要的意義i。(1)試驗(yàn)研究不同蓄水深下緩蓄快放系統(tǒng)所產(chǎn)生的水力要素變化,得到了各閘前蓄水深時(shí)下游沿程洪水位變化特點(diǎn),洪水水頭推進(jìn)時(shí)長(zhǎng)計(jì)算式、最高洪水位推進(jìn)時(shí)長(zhǎng)計(jì)算式、最高洪水位計(jì)算式、最高洪水位時(shí)流速變化特點(diǎn)。(2)試驗(yàn)研究下游底坎對(duì)潰壩水流的影響,得到了下游底坎上游水位變化規(guī)律。(3)采用MIKE軟件對(duì)模型試驗(yàn)中閘門處蓄水深度為0.12m條件下的緩蓄快放系統(tǒng)進(jìn)行模擬,得到了速度分布云圖,并對(duì)模擬結(jié)果進(jìn)行分析,同樣得到了斷面位置與最大水深、最大流量、斷面平均流速的關(guān)系曲線,對(duì)曲線進(jìn)行回歸性分析,得到各斷面最大水位、最大水位時(shí)的流量、斷面平均流速擬合函數(shù),以及各斷面流速在橫向的變化。(4)以研究成果為基礎(chǔ),在特定河道中建立緩蓄快放系統(tǒng)模擬水力要素變化。
[Abstract]:In recent years, urban landscape water has been more and more popular, because of its characteristics of viewing, entertainment and adjusting microclimate, it has been taken into account in urban construction. However, due to the slow flow of water, wide channel and insufficient upstream water, the urban landscape water body is liable to be polluted and the water quality deteriorates. Not only affect the beauty of the city, but also bring some inconvenience to the surrounding residents. Although governments and departments at all levels are trying to solve this problem, they have not come up with an effective method. According to the characteristics of landscape water body, a new method of improving and maintaining landscape water body, slow storage and fast release system, is put forward in this paper. To improve the water quality of urban landscape water. Taking Xi'an moat as the prototype, through theoretical calculation, physical model test and software simulation, the hydraulic factors of the river before and after the slow storage and releasing system are analyzed, and the influence of the slow storage and release system on the river course is analyzed. The research results have important significance for alleviating the severe situation of water environment and maintaining the balance of water ecosystem. The variation characteristics of flood water level along the downstream, the calculation formula of the length of the propulsive time of the flood head and the calculation formula of the maximum flood water level are obtained when the water storage depth in front of the sluice is deep. The characteristics of velocity variation at the highest flood level.) the influence of the bottom of the lower reaches on the flow of dam-break is studied by experiments. The variation law of water level in the upper reaches of the lower bottom is obtained. Mike software is used to simulate the slow storage and rapid discharge system under the condition of 0.12m storage depth at the gate in the model test, and the velocity distribution cloud map is obtained, and the simulation results are analyzed. The relationship between section position and maximum water depth, maximum discharge and average velocity of section is also obtained. The regression analysis of the curve is carried out, and the fitting function of the maximum water level, the maximum water level and the average flow velocity of each section is obtained. On the basis of the research results, a slow storage system is established to simulate the variation of hydraulic factors.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X52

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