云南森林资源遥感监测及时空变化分析

Remote Sensing Monitoring and Spatial-temporal Change Analysis of Forest Resources in Yunnan Province

以云南省2010年和2018年的Landsat卫星遥感影像为数据,以混合分类为理论基础,提取分析了2010-2018年云南森林覆盖时空演变特征,研究结果表明,2010-2018年研究区森林覆盖面积变化较小,减少了695 km^(2);云南省森林覆盖率达到63%,有7个州、市的森林覆盖率超过70%,高于全省的森林覆盖水平;西双版纳森林覆盖率最高(79%),普洱市森林覆盖面积最大,占全省森林覆盖面积的13.6%;昭通和曲靖森林覆盖率最低,分别为46%和47%;云南各州、市的森林面积变化差异明显,文山森林面积增加了1047 km^(2),63%新增森林原土地利用类型是草地和耕地;大理森林面积减少了1188 km^(2),减少的森林主要演变为裸地和草地;其余州、市的森林面积变化很小。

Based on the Landsat satellite remote sensing images of 2010 and 2018 in this region and the theory of hybrid classification,the forest cover data of Yunnan Province was extracted and analyzed regarding its spatial and temporal evolution characteristics of forest cover in Yunnan Province.The results showed that the change of forest coverage area in the study area is relatively small from 2010 to 2018,with a reduction of 695 km^(2).The forest coverage of Yunnan Province reaches 63%,and the forest coverage rate of 7 prefectures and cities exceeds 70%,higher than the forest coverage level of the whole province.Xishuangbanna has the highest forest coverage rate(79%)and Pu'er has the largest forest coverage area accounting for 13.6%of the total forest coverage area of the province.Zhaotong and Qujing have the lowest forest coverage rates,46%and 47%respectively.The forest area changes significantly among Yunnan prefectures and cities.The forest area of Wenshan has increased by 1047 km^(2),63%of the new forest area was originally grassland and cultivated land.The forest area of Dali has decreased by 1188 km^(2),and the reduced forest area has become bare land and grassland.The forest area of other states and cities has little change.