榆林地区土地生态敏感性时空动态分析
发布时间：2019-03-16 22:02
【摘要】：土地是国民经济及社会发展的重要物质基础，土地生态环境状况的优劣能直接或间接地对社会经济可持续发展产生影响。评价土地生态敏感性即是依据一定的判断标准对土地生态系统各要素的敏感性进行度量，回答系统所处的状况、对外界活动的适应程度等问题。榆林地区作为我国能源化工基地，人类活动影响强烈，，加之生态环境脆弱，生态环境问题突出。本文依据榆林地区土地生态系统目前存在的问题，充分考虑土地生态敏感性的影响因素，选取了水土流失、土地沙漠化、人为因素等3个土地生态敏感性因子，并确定其权重。通过资料收集、遥感影像解译、专家评定等方法，得出了榆林地区2000年、2005年及2010年3期土地利用图，土壤质地图和地形起伏度图。利用ArcGIS软件对不同敏感因子划分5个等级，针对榆林地区527块样地计算土地生态敏感性指数，得到3期敏感性指数图。结果表明榆林地区土地生态敏感性指数值较高的地区主要分布在定边县及靖边县一带，毛乌素沙漠南缘风沙草滩区敏感性指数值居中，东南部黄土高原丘陵沟壑区敏感性指数略低。
[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.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：F301.2;P208
本文编号：2442000
[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.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：F301.2;P208
【引证文献】
相关期刊论文 前2条
1 党国锋;纪树志;;基于GIS的秦巴山区土地生态敏感性评价──以陇南山区为例[J];中国农学通报;2017年07期
2 夏敏;张智超;文博;邹伟;;苏南地区土地利用的生态敏感性分区[J];水土保持通报;2016年04期
相关硕士学位论文 前1条
1 汪晗;榆林地区景观生态风险时空分析[D];长安大学;2015年
本文编号：2442000
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