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基于DEM的辽宁省兴城市耕地地形条件评价
吴松泽, 闫卓冉, 马剑, 徐铭崇, 范语思, 王建国
吉林大学 地球科学学院, 吉林 长春 130000
摘要:
[目的]评价辽宁省兴城市耕地地形条件,为指导兴城市的农作物耕作,耕地质量评价,水土流失及泥石流灾害防治,耕地生态环境保护等提供依据。[方法]利用遥感和地理信息空间分析技术,以数字高程模型为基础,选取坡度、坡向、地表起伏度、平面曲率、地形粗糙度为评价因子,对研究区的耕地地形条件进行多因子综合加权评价。[结果]兴城市耕地地形条件为:Ⅰ和Ⅱ级的良好耕地占总耕地面积的85.57%,地形条件为Ⅲ和Ⅳ级的一般耕地比例为14.17%,只有0.26%的耕地地形条件为Ⅴ级,需要适当调整。[结论]兴城市耕地地形条件整体较为良好,极少数耕地地形条件差,不宜开垦耕地,需退耕。
关键词:  DEM  兴城市  耕地  地形因子  地形条件评价
DOI:10.13961/j.cnki.stbctb.2018.05.031
分类号:P931
基金项目:吉林大学创新创业训练项目“基于DEM的兴城地区耕地地形条件的评价研究”(2017A61238)
Assessment on Terrain Conditions of Cultivated Land Based on DEM in Xingcheng City, Liaoning Province
WU Songze, YAN Zhuoran, MA Jian, XU Mingchong, FAN Yusi, WANG Jianguo
School of Earth Sciences, Jilin University, Changchun, Jilin 130000, China
Abstract:
[Objective] Taking Xingcheng City, Liaoning Province as the research area, this study evaluates and analyzes the topographic conditions of arable land in order to provide the basis for guiding crop cultivation, arable land quality evaluation, soil erosion and debris flow disaster prevention, and ecological environmental protection of the arable land.[Methods] Based on the digital elevation model (DEM), the slope, aspect, surface undulation, plane curvature and terrain roughness were selected as the evaluation factors, to evaluate the cultivated land topographic conditions by the multi-factor weighted comprehensive evaluation.[Results] The terrain condition of the arable land of Xingcheng City was as follows:85.57% of the total arable land was good arable land of grade Ⅰ and Ⅱ, 14.17% was general arable land of grade Ⅲ and Ⅳ, and only 0.26% was grade Ⅴ.[Conclusion] The topographic conditions of arable land in Xingcheng City are relatively good as a whole. However, few arable land is in poor topographic conditions, which is not suitable to reclaim and needs to be returned to farmland.
Key words:  DEM  Xingcheng City  arable land  terrain factor  evaluation of terrain conditions