浅析云南省岩溶地区石漠化空间分布特征——以建水县为例

Spatial Distribution Characteristics of Rocky Desertification in Karst Areas of Yunnan Province——Taking Jianshui County

建水境内石漠化分布情况被系统研究,为建水乃至云南省今后石漠化科学管理和植被恢复等综合治理提供有价值的参考,以建水县第三次石漠化监测数据为基础,通过ARCGIS叠加提取法,系统分析不同区域、地类、海拔、坡度、坡位和坡向等尺度下石漠化分布特征及其规律。结果表明,建水县不同土地类型石漠化发生面积大小排序为耕地>乔木林>灌木林>其他林地>其他非林地>竹林;各乡镇石漠化发生情况主要集中在面甸镇、临安镇、青龙镇和盘江乡4个乡镇,占全县的60.71%;建水石漠化发生面积随海拔和坡度的增加呈现先降低后增加最后降低的曲线变化趋势;建水不同坡向和坡位下石漠化发生程度面积大小排序为无坡向>南>西>东>北,中部>上部>平地>下部>谷地>脊部。

The distribution of rocky desertification in Jianshui has been systematically studied,providing valuable reference for the scientific management of rocky desertification and comprehensive management of vegetation restoration in Jianshui and even Yunnan province in the future.Based on the third monitoring data of rocky desertification in Jianshui county,the ARCGIS superposition extraction method is used to systematically analyze the distribution characteristics and laws of rocky desertification at different scales such as region,land type,altitude,slope,slope position,and slope aspect.The results show that the order of the occurrence area of rocky desertification in different land types in Jianshui county is arable land>tree forest>shrub forest>other forest land>other non forest land>bamboo forest;The occurrence of rocky desertification in various townships is mainly concentrated in four townships:Miandian town,Lin’an town Qinglong town and Panjiang township,accounting for 60.71%of the county’s total;The area of rocky desertification in Jianshui shows a curve trend of first decreasing,then increasing,and finally decreasing with the increase of altitude and slope;The order of the occurrence degree and area of rocky desertification under different slope orientations and positions in Jianshui is as follows:no slope orientation>south>west>east>north,middle>upper>flat>lower>valley>ridge.