湿热岩溶山区植被覆盖度与地形因子的相关性研究--以广西红水河流域为例  

Correlation between Vegetation Coverage and Terrain Factors in DampHot Karst Mountainous Areas of Hongshui River Basin

作　　者：李史干 周慧杰[1] 朱杰[1] 吴燕婷[1] 周强[1] 刘云东[1] 姜宁[1] LI Shi-gan;ZHOU Hui-jie;ZHU Jie;WU Yan-ting;ZHOU Qiang;LIU Yun-dong;JIANG Ning(Key Laboratory of Environment Change and Resources Use in Beibu Gulf, Ministry of Education, Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, School of Geography and Planning, Guangxi Teachers Education University, Nanning 530001, PRC)

机构地区：[1]北部湾环境演变与资源利用教育部重点实验室,广西地表过程与智能模拟重点实验室,广西师范学院地理与规划学院,广西南宁530001

出　　处：《湖南农业科学》2018年第1期55-59,共5页Hunan Agricultural Sciences

基　　金：国家自然科学基金(41361023);北部湾环境演变与资源利用教育部重点实验室开放基金(BBG1110)

摘　　要：以广西红水河流域为例,综合运用GIS和RS技术,采集2005、2010和2015年的MODIS Aqua 16 d NDVI合成数据,监测湿热岩溶山区植被覆盖度动态变化。利用GDEMDEM 30 M分辨率数字高程数据,获得广西红水河流域高程、坡度以及地形起伏度等地形因子数据,综合分析植被覆盖度与地形因子的相关性,以期为湿热岩溶山区植被恢复和生态建设提供依据。结果表明:高植被覆盖度在高程为500~750 m的区域达到最大值;当坡度大于6°,高植被覆盖度快速增加,变化趋势显著,而在2010年后趋势变缓慢;当地形起伏度小于0.25时,各等级植被覆盖度占比差异不大,但当地形起伏度大于0.25,高植被覆盖度成为主体,其他各级植被覆盖度所占面积比例逐渐减小。Based on the data of MODIS Aqua16d NDVI from2005to2015and combined with GIS and RS technology,this study monitored the dynamic change of vegetation coverage in Hongshui River Basin’s damp hot karst mountainous areas of Guangxi,and obtained the data on the elevation,slope,relief amplitude and other terrain factors of the basin based on the GDEMDEM30M resolution digital elevation data,to analyze the relationship between vegetation coverage and terrain factors so as to provide scientific basis for the re-vegetation and ecological construction of the areas.The results showed that the vegetation coverage was up to its maximum in the elevation range from500-750m;the vegetation coverage increased and changed sharply in the case of the slop>6°,while the trend was slower after2010;and the ratio of each grade vegetation coverage changed gently at the relief amplitude<0.25,and the high vegetation coverage became significant at the relief amplitude>0.25.

关 键 词：植被覆盖度 地形因子 相关性 广西红水河流域 

分 类 号：S17[农业科学—农业基础科学]