本文選題：關(guān)中地區(qū) + 地下水儲量　； 參考：《蘭州交通大學(xué)》2017年碩士論文

【摘要】：近年來,“地下水過量開采”以及“水質(zhì)污染”等地下水危機(jī)問題逐漸顯現(xiàn),所以對于地下水資源的監(jiān)測和研究就顯得尤為重要。本文以我國西北部關(guān)中城市群所在的關(guān)中平原地區(qū)為研究區(qū)域,聯(lián)合多源GNSS數(shù)據(jù),以重力場及其確定的大陸水等效水高變化為參考場,采用移去恢復(fù)法,確定關(guān)中城市群高分辨率的非構(gòu)造形變;基于地球負(fù)荷彈性形變理論,本文從CORS站垂直形變中,移去潮汐影響(極潮、固體潮、半日以及周日大氣潮負(fù)荷)及土壤水、大氣負(fù)荷影響,采用地球負(fù)荷形變和地球重力場嚴(yán)密組合的方法,聯(lián)合地下水測站數(shù)據(jù)來解算關(guān)中地區(qū)地下水儲量的月變化,實(shí)現(xiàn)了關(guān)中城市群地下水儲量時空變化監(jiān)測與分析。本文的主要研究成果如下:(1)本文綜合使用了多種數(shù)據(jù),其中最為關(guān)鍵的區(qū)域CORS站整體數(shù)據(jù)良好,數(shù)據(jù)周期性明顯,站點(diǎn)大地高數(shù)值范圍在㧟40㧟40mm之間;通過各類數(shù)據(jù)計算而得的區(qū)域年平均大氣導(dǎo)納值范圍在㧟1.9—㧟0.7之間、大氣壓變化對CORS站的垂直型變影響數(shù)值范圍在㧟20—20mm、站點(diǎn)低頻參數(shù)計算時序?yàn)V波值在㧟10—10mm之間。(2)聯(lián)合解算出區(qū)域的地下水變化,發(fā)現(xiàn)(1)區(qū)域地下水儲量變化值在-1.2m—0.9m之間;(2)從2011年至2016年上半年整體變化幅度不大;(3)地下水儲量變化的區(qū)域性比較明顯,在陜西西北部和寧夏東部地下水儲量減少明顯,相對2011年6月的值減少可達(dá)1.2m,而甘肅東部,與陜西和寧夏交界地區(qū)地下水儲量增加比較明顯,相對2011年6月增加可達(dá)0.9m。通過對水儲量年平均變化計算發(fā)現(xiàn),近年來城市群地下水儲量變化總體平穩(wěn),部分地區(qū)仍有下降趨勢,下降幅度在2cm/y左右。對關(guān)中平原地區(qū)地下水儲量變化的情況進(jìn)行監(jiān)測,而且監(jiān)測其長時間序列的形變,掌握地下水儲量現(xiàn)狀,以及以后深入探索地下水儲量變化的成因,這樣可以幫助相關(guān)政府部門在進(jìn)行規(guī)劃、制定防災(zāi)減災(zāi)方案以及決策提供一定的資料,具有一定的科研價值以及實(shí)用價值。
[Abstract]:In recent years, the problems of groundwater crisis such as "groundwater overexploitation" and "water pollution" have gradually appeared, so it is particularly important to monitor and study groundwater resources. In this paper, the Guanzhong Plain, where the Guanzhong Urban agglomeration in the northwest of China is located, is used as the study area, and the gravity field and the change of the equivalent water height of the continental water are taken as the reference field, and the method of removal and restoration is adopted. Based on the elastic deformation theory of earth load, the tidal influence (polar tide, solid tide, semi-diurnal and diurnal atmospheric tidal load) and soil water are removed from the vertical deformation of CORS station. Under the influence of atmospheric load, the monthly variation of groundwater reserves in Guanzhong area is calculated by combining the ground water station data with the rigorous combination of earth load deformation and earth gravity field. The monitoring and analysis of groundwater reserves in Guanzhong urban agglomeration are realized. The main research results of this paper are as follows: (1) in this paper, many kinds of data are synthetically used, among which the most critical area CORS station has good overall data, the periodicity of the data is obvious, the height of the station is in the range of 40mm or 40mm; The regional average atmospheric admittance calculated from various data ranges from 1.9-0.7. The influence of atmospheric pressure on the vertical variation of CORS station is in the range of 20-20mm, and the time-series filtering value of the low-frequency parameters of the station is between 10-10mm and 10-10mm. It is found that the variation of regional groundwater reserves is between -1.2m-0.9m) from 2011 to the first half of 2016, the variation range of groundwater reserves is not large. (3) the regional variation of groundwater reserves is obvious, and the groundwater reserves decrease obviously in northwest Shaanxi and eastern Ningxia. Compared with June 2011, the value of groundwater decreased by 1.2 m, but in the eastern part of Gansu, the groundwater reserves increased obviously in the border areas of Shaanxi and Ningxia, and the increase reached 0.9mcompared with June 2011. Through the calculation of the annual average water reserves, it is found that the groundwater reserves of urban agglomeration have a steady change in recent years, and some areas still have a downward trend, the decline range is about 2cm/y. Monitoring the change of groundwater reserves in Guanzhong Plain, monitoring the deformation of its long time series, mastering the present situation of groundwater reserves, and further exploring the causes of groundwater reserves change, This can help the relevant government departments in planning, disaster prevention and mitigation programs and decision-making to provide certain information, with a certain value of scientific research and practical value.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P641.7;P228.4

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