【摘要】 本文依据最新遥感影像和多种统计资料,分别计算了陕西省96个市县植被覆盖与土地退化指数。采用全样本统计和典型剖面分析的方法,对陕西县域植被覆盖和土地退化的关系进行了分析,结果显示:(1)植被覆盖与土地退化有着极为密切的关系,随着植被覆盖指数的降低,土地退化呈明显的加重趋势,植被覆盖≤20%为其临界值;(2)在湿润指数≤1.2的关中平原和汉江谷底,由于农业开发和城镇建设,植被覆盖与土地退化关系不甚明显。更多还原

【Abstract】 According as the latest RS image and multi-statistic,the index of vegetation cover and land retirement were counted about 96 towns of Shaanxi province.Taken the methods of all stylebook’s Statistic and representative section plane’s analysis,the relationship between vegetation cover and land retirement is analyzed,and drawn the conclusions as below:①There is a closed relation between vegetation cover and land retirement.With the fall of vegetation cover’s index,the tendency of land retirement is aggravate,the critical value is vegetation cover’s rate≤20%;②The wetness index of Guanzhong plain and Han-river bed is≤1.2,the relationship between vegetation cover and land retirement is not obvious because of agro-development and construction of towns.更多还原