本文關(guān)鍵詞：安寧河流域生態(tài)環(huán)境脆弱性評(píng)價(jià)　出處：《成都理工大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 安寧河流域 生態(tài)環(huán)境脆弱性 投影尋蹤模型 GIS RS

【摘要】：近年來,我國經(jīng)濟(jì)快速發(fā)展,但是發(fā)展的同時(shí),各種環(huán)境問題頻繁發(fā)生,嚴(yán)重阻礙了我國經(jīng)濟(jì)社會(huì)的可持續(xù)發(fā)展。因此,生態(tài)環(huán)境脆弱性的研究已成為當(dāng)前人類社會(huì)的熱門問題,并引起許多專家學(xué)者的廣泛關(guān)注。本文闡述了生態(tài)環(huán)境脆弱性的國內(nèi)外研究進(jìn)展,并在此基礎(chǔ)上,論述了選題依據(jù)、研究意義及研究的理論和方法。結(jié)合地處我國西南山地農(nóng)牧交錯(cuò)生態(tài)脆弱區(qū)核心地帶的安寧河流域的實(shí)際情況,依據(jù)已有的生態(tài)環(huán)境脆弱性評(píng)價(jià)研究相關(guān)理論及成果,建立安寧河流域生態(tài)脆弱性評(píng)價(jià)指標(biāo)體系。在RS和GIS技術(shù)支持下運(yùn)用數(shù)學(xué)模型對(duì)生態(tài)環(huán)境脆弱性時(shí)空變化進(jìn)行分析,實(shí)現(xiàn)安寧河流域生態(tài)脆弱性的評(píng)價(jià)研究,并討論其時(shí)空分異規(guī)律。通過本文的研究分析主要獲得以下成果:(1)該體系在充分考慮安寧河流域特殊的生態(tài)環(huán)境特點(diǎn)的前提下,懫取成因-結(jié)果脆弱性評(píng)價(jià)指標(biāo)體系,綜合選取包括高程、坡度、植被覆蓋、土地利用、土壤類型、氣溫、降水、GDP和人口密度作為評(píng)價(jià)指標(biāo),運(yùn)用投影尋蹤模型對(duì)各項(xiàng)指標(biāo)權(quán)重賦值,并以此為基礎(chǔ)進(jìn)行生態(tài)脆弱性評(píng)價(jià)分析,確定各個(gè)區(qū)域生態(tài)脆弱性的主導(dǎo)影響因子。(2)從最終獲得的安寧河流域生態(tài)脆弱性評(píng)分指數(shù)來看,研究區(qū)生態(tài)脆弱性指數(shù)集中分布在微度脆弱區(qū)和輕度脆弱區(qū),所占的比例超過了百分之六十,由此可以判斷安寧河流域的生態(tài)環(huán)境處于中等水平。對(duì)各項(xiàng)評(píng)價(jià)因子進(jìn)行對(duì)比分析表明,影響安寧河流域生態(tài)脆弱性的主要因素人類活動(dòng)及社會(huì)經(jīng)濟(jì)情況的影響。(3)綜合1993-2013這20年的統(tǒng)計(jì)數(shù)據(jù),通過ArcGIS與投影尋蹤模型的結(jié)合實(shí)現(xiàn)了對(duì)安寧河流域生態(tài)脆弱性的動(dòng)態(tài)分析。發(fā)現(xiàn)2013年安寧河流域的生態(tài)環(huán)境相對(duì)1993年的生態(tài)環(huán)境有所好轉(zhuǎn),仍有部分地區(qū)有環(huán)境惡化的趨勢。通過對(duì)安寧河流域的生態(tài)環(huán)境脆弱性進(jìn)行評(píng)價(jià)以及對(duì)其環(huán)境變化的驅(qū)動(dòng)力分析,可以全面的了解安寧河流域的環(huán)境狀況,針對(duì)性的提出環(huán)境保護(hù)的政策措施,為該地區(qū)的環(huán)境保護(hù)和地區(qū)社會(huì)的可持續(xù)發(fā)展提供依據(jù)。
[Abstract]:In recent years, China's economy has developed rapidly, but at the same time, a variety of environmental problems occur frequently, which seriously hinder the sustainable development of our economy and society. The study of ecological environmental vulnerability has become a hot issue in human society, and has attracted the extensive attention of many experts and scholars. This paper describes the domestic and foreign research progress of ecological environmental vulnerability, and on this basis. This paper discusses the basis, significance, theory and method of the research, combined with the actual situation of the Anning River basin, which is located in the ecotone of agriculture and animal husbandry in southwest of China. According to the existing ecological vulnerability assessment theory and results. The evaluation index system of ecological vulnerability in Anning River Basin was established, and the temporal and spatial changes of ecological vulnerability were analyzed by using mathematical model supported by RS and GIS technology. To realize the evaluation of ecological vulnerability in Anning River basin. Through the research and analysis of this paper, the following results are obtained: 1) the system is based on the consideration of the special ecological environment characteristics of the Anning River Basin. Gene-outcome vulnerability evaluation index system was selected, which included elevation, slope, vegetation cover, land use, soil type, temperature, precipitation GDP and population density. Using projection pursuit model to assign the weight of each index, and based on the evaluation of ecological vulnerability analysis. Determine the dominant impact factor of each region ecological vulnerability. 2) from the final Anning River Basin ecological vulnerability score index. The ecological vulnerability index (EVI) of the study area was concentrated in the micro-fragile area and the mildly vulnerable area, and the proportion was more than 60%. It can be judged that the ecological environment of Anning River basin is in the middle level. The comparative analysis of various evaluation factors shows that. The main factors affecting ecological vulnerability in the Anning River Basin are human activities and the impact of socio-economic conditions. Through the combination of ArcGIS and projection pursuit model, the dynamic analysis of ecological fragility of Anning River basin is realized. It is found that the ecological environment of Anning River basin in 2013 is better than that of 1993. Turn. There is still a trend of environmental deterioration in some areas. Through the assessment of the ecological vulnerability of the Anning River basin and the analysis of the driving force of its environmental change, we can fully understand the environmental situation of the Anning River basin. The policies and measures of environmental protection are put forward in order to provide the basis for the environmental protection in this area and the sustainable development of regional society.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：X826

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本文編號(hào)：1429917