| 滇东南喀斯特区域石漠化时空格局演变研究——以广南县为例 |
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| 引用本文： | 王茜,赵筱青,普军伟,李思楠,苗培培.滇东南喀斯特区域石漠化时空格局演变研究——以广南县为例[J].中国岩溶,2021,40(4):707-717. |
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| 作者姓名： | 王茜 赵筱青 普军伟 李思楠 苗培培 |
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| 作者单位： | 云南大学地球科学学院 |
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| 基金项目： | 云南省科技厅-云南大学“双一流”建设联合基金项目（2018FY001(-017)）；云南大学研究生创新人才培养项目（C176230200）；2020年云南省教育厅科学研究基金项目：研究生类（2020Y0030） |
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| 摘 要： | 石漠化给区域发展带来了一系列生态环境和社会经济问题，国家自实施生态治理工程以来，区域石漠化得到一定改善。为探讨生态治理工程实施后石漠化格局变化，研究以滇东南典型喀斯特区域广南县为例，以2000年、2010年和2018年3期遥感影像为数据源，通过人机交互式解译获得石漠化空间分布数据，运用时间变化度、转移矩阵和叠加分析等方法，分析广南县石漠化时空格局演变特征。结果表明:（1）时间变化上，广南县石漠化类型仍以重度石漠化为主，但是石漠化面积总体在不断减少。灌木林地和未利用地石漠化面积最大，其中灌木林地以潜在石漠化为主，未利用地以重度石漠化为主，是石漠化重点治理的用地类型。2000-2010年石漠化转移方向是向无石漠化和相邻等级石漠化转移，2010-2018年主要向低等级石漠化转移；（2）空间分布上，广南县喀斯特区域石漠化南多北少，呈现南重北轻的分布格局，沿篆角乡—黑支果乡—南屏镇南部—八宝镇西南部一线、珠琳镇和五珠乡相邻区域、珠街镇和曙光乡的相邻区域是石漠化集中分布区；（3）19年间，广南县喀斯特南部区域的石漠化大面积改善，而中部及北部区域的石漠化不断恶化。整体而言，退耕还林等生态治理工程的实施，能有效改善喀斯特区域的石漠化状况，使广南县石漠化总面积减少了288.98km2。
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| 关 键 词： | 喀斯特区域 石漠化 时空格局演变 生态环境治理工程 广南县 |
Study on temporal and spatial pattern evolution of karst rocky desertification region of southeast Yunnan:A case study of Guangnan county |
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| WANG Qian,ZHAO Xiaoqing,PU Junwei,LI Sinan,MIAO Peipei.Study on temporal and spatial pattern evolution of karst rocky desertification region of southeast Yunnan:A case study of Guangnan county[J].Carsologica Sinica,2021,40(4):707-717. |
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| Authors: | WANG Qian ZHAO Xiaoqing PU Junwei LI Sinan MIAO Peipei |
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| Institution: | School of Earth Science，Yunnan University， Yunnan University |
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| Abstract: | Karst rocky desertification has brought a series of ecological environment and socioeconomic problems to regional development. Since the implementation of ecological control projects， regional karst rocky desertification has been improved to a certain extent. In order to explore the changes of karst rocky desertification pattern after the implementation of ecological control project，Guangnan county，a typical karst area in southeastern of Yunnan，was taken as an example in this study. Based on three remote sensing images of 2000，2010 and 2018 as the data source，the spatial distribution data of karst rocky desertification was obtained through human-computer interactive interpretation，and the methods of time variation，transfer matrix，and superposition analysis were used to analyze the spaial-temporal pattern evolution characteristics of karst rocky desertification in Guangnan County. Characteristics of the evolution of the spatial and temporal pattern of desertification. The results show that，（1）Temporally，the type of karst rocky desertification in Guangnan county is still dominated by severe karst rocky desertification，but the area of karst rocky desertification is generally decreasing. Shrub land and unutilized land have the largest karst rocky desertification area.Shrub land is dominated by potential karst rocky desertification，while unutilized land is dominated by severe karst rocky desertification，both of them are the key land use types for the implementation of karst rocky desertification control projects. From 2000 to 2010，the transfer direction of karst rocky desertification is to non-karst rocky desertification and adjacent grade rocky desertification，while，from 2010 to 2018，the transfer direction of karst rocky desertification is to low grade rocky desertification；（2）Spatially ，the karst rocky desertification area in Guangnan county is more in the north and less in the south，showing a distribution pattern of karst desertification of heavy in the south and light in the north.The karst rocky desertification is concentrated along the Zhuanjiao township-Heizhiguo township-south of Nanping town-the southwestern part of Babao town，the adjacent area of Zhulin town and Wuzhu township，Zhujie town and Shuguang township；（3）During the past 19 years，the karst rocky desertification in the southern area of Guangnan county has been improved greatly，while the karst rocky desertification in the central and northern regions continued to deteriorate. On the whole，the implementation of ecological control projects such as Grain for Green project can effectively improve the karst rocky desertification situation in the karst area and reduce the total area of karst rocky desertification in Guangnan county by 288.98 km2. |
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