發(fā)布時(shí)間：2018-06-16 00:37

  本文選題：石漠化 + 遙感　； 參考：《四川師范大學(xué)》2015年碩士論文

【摘要】：石漠化作為困擾我國生態(tài)環(huán)境的三大“頑疾”之一,是西南巖溶地區(qū)最難治理的自然災(zāi)害,嚴(yán)重制約了當(dāng)?shù)氐纳鐣?huì)經(jīng)濟(jì)發(fā)展。由于石漠化多發(fā)于自然生態(tài)環(huán)境較為脆弱的地區(qū),治理的難度非常大,因此如何快速提取區(qū)域性石漠化空間信息,劃定石漠化等級(jí),是石漠化防治的重要基礎(chǔ)研究。華鎣市作為四川省5個(gè)巖溶地區(qū)石漠化綜合治理試點(diǎn)縣(市)之一,是四川省巖溶地區(qū)的典型代表,其石漠化問題得到了省政府高度重視。以遙感技術(shù)為手段可以對(duì)華鎣市的溶巖地區(qū)進(jìn)行大范圍、高精度的監(jiān)測(cè),用ERDAS8.6軟件進(jìn)行遙感圖像處理并結(jié)合實(shí)地考察對(duì)多個(gè)石漠化圖斑進(jìn)行核對(duì),監(jiān)測(cè)數(shù)據(jù)精度并加以校正,為華鎣市石漠化監(jiān)測(cè)和治理提供數(shù)據(jù)支持,并基于此對(duì)當(dāng)?shù)厥畔⑦M(jìn)行提取,分析石漠化形成原因。本文主要研究結(jié)論如下:(1)華鎣市土地利用結(jié)構(gòu)不太合理。總體上看,雖然生態(tài)林地較多,但是由于當(dāng)?shù)厣鷳B(tài)環(huán)境脆弱,人為的破壞和其他性質(zhì)用地對(duì)生態(tài)林地的占用,使當(dāng)?shù)亓值爻掷m(xù)減少,石漠化范圍呈擴(kuò)張趨勢(shì)。(2)華鎣市石漠化情況錯(cuò)綜復(fù)雜,多為中度石漠化、輕度石漠化和潛在石漠化區(qū)域,由于開礦和工業(yè)化生產(chǎn)使得這些區(qū)域有向重度石漠化惡化的趨勢(shì)。石漠化區(qū)域土壤肥力流失嚴(yán)重,動(dòng)態(tài)上看已由散點(diǎn)狀逐漸發(fā)展成為連片帶狀。(3)華鎣市石漠化是受多重因素的綜合影響形成的。長坡面的地形、易被溶蝕的巖質(zhì)加之季節(jié)性強(qiáng)降水造成的頻繁沖刷使得當(dāng)?shù)厮帘３蛛y度大,加之陡坡開墾、過度樵采、不合理開發(fā)建設(shè)、不適當(dāng)經(jīng)營方式等不合理的人為因素的影響使得當(dāng)?shù)厥闆r較為嚴(yán)重。
[Abstract]:Rocky desertification, as one of the three "stubborn diseases" that haunt the ecological environment of China, is the most difficult natural disaster in the karst area of southwest China, which seriously restricts the local social and economic development. Because the rocky desertification is mostly in the fragile area of the natural ecological environment, it is very difficult to control it. Therefore, how to quickly extract the spatial information of the regional rocky desertification and delimit the grade of the rocky desertification is an important basic research for the prevention and control of the rocky desertification. As one of the five pilot counties (cities) for comprehensive control of rocky desertification in Sichuan Province Huaying City is a typical representative of karst area in Sichuan Province and its rocky desertification problem has been attached great importance by the provincial government. Remote sensing technology can be used to monitor the karst area of Huaying City in a wide range and high precision. ERDAS8.6 software is used to process remote sensing images and check many rocky desertification map spots in combination with field investigation, to monitor the accuracy of data and to correct them. It provides data support for the monitoring and control of rocky desertification in Huaying city, and based on this, extracts the local rocky desertification information and analyzes the causes of rocky desertification. The main conclusions of this paper are as follows: 1) the land use structure of Huaying City is not reasonable. Generally speaking, although there are more ecological forests, due to the fragile local ecological environment, man-made destruction and the occupation of other types of land for ecological forest land, the local forest land continues to decrease. The rocky desertification in Huaying city is complicated, most of which are moderate rocky desertification, mild rocky desertification and potential rocky desertification areas, which are aggravated to severe rocky desertification due to mining and industrial production. The loss of soil fertility in rocky desertification area is serious, and the soil fertility loss has gradually developed from scattered spot shape to continuous zonal shape.) the rocky desertification in Huaying City is influenced by many factors. The topography of the long slope, the easily dissolved rock quality and the frequent erosion caused by the seasonal strong precipitation make it difficult for local soil and water conservation, plus the steep slope reclamation, excessive firewood mining, unreasonable development and construction. The local rocky desertification is more serious because of unreasonable human factors, such as improper management mode.
【學(xué)位授予單位】：四川師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X87;X171

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 張盼盼;胡遠(yuǎn)滿;肖篤寧;李秀珍;殷潔;;喀斯特高原山區(qū)的景觀格局變化垂直分異性——以貴州省普定后寨地下河流域中下游為例[J];長江流域資源與環(huán)境;2009年07期

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本文編號(hào)：2024397