【摘要】：土地是國民經(jīng)濟及社會發(fā)展的重要物質(zhì)基礎(chǔ)，土地生態(tài)環(huán)境狀況的優(yōu)劣能直接或間接地對社會經(jīng)濟可持續(xù)發(fā)展產(chǎn)生影響。評價土地生態(tài)敏感性即是依據(jù)一定的判斷標準對土地生態(tài)系統(tǒng)各要素的敏感性進行度量，回答系統(tǒng)所處的狀況、對外界活動的適應程度等問題。榆林地區(qū)作為我國能源化工基地，人類活動影響強烈，，加之生態(tài)環(huán)境脆弱，生態(tài)環(huán)境問題突出。本文依據(jù)榆林地區(qū)土地生態(tài)系統(tǒng)目前存在的問題，充分考慮土地生態(tài)敏感性的影響因素，選取了水土流失、土地沙漠化、人為因素等3個土地生態(tài)敏感性因子，并確定其權(quán)重。通過資料收集、遙感影像解譯、專家評定等方法，得出了榆林地區(qū)2000年、2005年及2010年3期土地利用圖，土壤質(zhì)地圖和地形起伏度圖。利用ArcGIS軟件對不同敏感因子劃分5個等級，針對榆林地區(qū)527塊樣地計算土地生態(tài)敏感性指數(shù)，得到3期敏感性指數(shù)圖。結(jié)果表明榆林地區(qū)土地生態(tài)敏感性指數(shù)值較高的地區(qū)主要分布在定邊縣及靖邊縣一帶，毛烏素沙漠南緣風沙草灘區(qū)敏感性指數(shù)值居中，東南部黃土高原丘陵溝壑區(qū)敏感性指數(shù)略低。
[Abstract]:Land is an important material basis for the development of national economy and society. The advantages and disadvantages of land ecological environment can directly or indirectly affect the sustainable development of social economy. To evaluate the ecological sensitivity of land is to measure the sensitivity of various elements of the land ecosystem according to certain judgment criteria, to answer the situation of the system and the degree of adaptation to external activities and so on. As a base of energy and chemical industry in China, Yulin area has a strong influence on human activities, and the ecological environment is fragile and the ecological environmental problems are prominent. According to the existing problems of land ecosystem in Yulin area and considering the influencing factors of land ecological sensitivity, this paper selects three land ecological sensitivity factors, such as soil and water loss, land desertification and man-made factors, and determines the weight of soil and water loss, land desertification and man-made factors. Through the methods of data collection, remote sensing image interpretation and expert evaluation, the land use map, soil quality map and topographic fluctuation map of Yulin area in 2000, 2005 and 2010 were obtained. Using ArcGIS software to divide 5 grades of different sensitive factors, the ecological sensitivity index of land was calculated according to 527 sample plots in Yulin area, and the three-stage sensitivity index map was obtained. The results showed that the areas with higher land ecological sensitivity index were mainly distributed in Dingbian County and Jingbian County, and the sensitivity index value was centered in the sandy beach area on the south edge of Maowusu Desert. The sensitivity index in the hilly and gully region of the southeastern Loess Plateau was slightly lower.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：F301.2;P208

【引證文獻】

相關(guān)期刊論文 前2條

1 黨國鋒;紀樹志;;基于GIS的秦巴山區(qū)土地生態(tài)敏感性評價──以隴南山區(qū)為例[J];中國農(nóng)學通報;2017年07期

2 夏敏;張智超;文博;鄒偉;;蘇南地區(qū)土地利用的生態(tài)敏感性分區(qū)[J];水土保持通報;2016年04期

相關(guān)碩士學位論文 前1條

1 汪晗;榆林地區(qū)景觀生態(tài)風險時空分析[D];長安大學;2015年

本文編號：2442000