| 珠江上游喀斯特地区土地石漠化现状遥感分析 |
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| 引用本文： | 王敬贵,杨德生,余顺超,喻丰华,杨健新.珠江上游喀斯特地区土地石漠化现状遥感分析[J].中国水土保持科学,2007,5(3):1-6. |
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| 作者姓名： | 王敬贵 杨德生 余顺超 喻丰华 杨健新 |
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| 作者单位： | 1. 珠江水利委员会珠江水利科学研究院
2. 水利部珠江水利委员会,510611,广州 |
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| 基金项目： | 引进国际先进农业科学技术计划(948计划) |
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| 摘 要： | 以2002年前后的Landsat7ETM+遥感影像为主要数据源,采用人机交互解译的方法,对珠江上游喀斯特地区土地石漠化强度现状进行遥感解译,解译精度高达87%。对遥感解译分析和研究的结果表明:整个珠江上游的土地石漠化已十分严重,石漠化、半石漠化土地面积3万9900 km2,占总面积的16.4%;石漠化、半石漠化比率大于15%的石漠化县有52个,其中贵州省土地石漠化最严重,石漠化、半石漠化比率高达21.9%,有23个石漠化县(区),广西和云南相对较轻,石漠化、半石漠化比率分别为14.7%和14.4%,分别有21和8个石漠化县。珠江上游19个市(州)中就有12个市(州)的石漠化、半石漠化面积超过1000km2,集中分布于贵州黔南州—广西河池市、贵州黔西南州—云南曲靖市和云南文山州—广西百色市3个石漠化条带上。
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| 关 键 词： | 石漠化 喀斯特 遥感 珠江上游 |
| 收稿时间： | 2006-07-06 |
| 修稿时间： | 2007-04-04 |
Analysis on Karst rocky desertification in upper reaches of Pearl River based on remote sensing |
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| Wang Jinggui,Yang Desheng,Yu Shunchao,Yu Fenghua,Yang Jianxin.Analysis on Karst rocky desertification in upper reaches of Pearl River based on remote sensing[J].Science of Soil and Water Conservation,2007,5(3):1-6. |
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| Authors: | Wang Jinggui Yang Desheng Yu Shunchao Yu Fenghua Yang Jianxin |
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| Institution: | 1.Pearl River Institute of Hydraulic Research;2.Pear River Water Resources Commission: 510611,Guangzhou,China |
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| Abstract: | The status of Karst rocky desertification in upper reaches of Pearl River was analyzed based on Landsat7 ETM+ satellite images of 2002 in this paper,and accuracy of remote sensing classification of rocky desertification intensity was above 87%.Analyses of remote sensing classification of rocky desertification show that the status of Karst rocky desertification intensity in upper reaches of Pearl River is very serious,and the land area of rocky desertification is about 39 900 km2,accounts for 16.4% of total land area,and the number of counties whose rocky desertification ratio bigger than 15% is 52,which accounts for nearly 50% of all counties in the upper reaches.Among three provinces in upper reaches of Pearl River,the intensity status of Karst rocky desertification of Guizhou province is highest,whose rocky desertification ratio is about 21.9% and the number of rocky desertification counties in Guizhou is 23,while the intensity status of Guangxi and Yunnan are lighter than that of Guizhou,whose rocky desertification ratio are 14.7% and 14.4% respectively,and the numbers of rocky desertification counties are 21 and 8 respectively.Among the 19 cities,there are 12 cities whose land area of rocky desertification is bigger than 1 000 km2,and they are located mainly along three belts-one from Qiannan in Guizhou to Hechi in Guangxi,another from Qianxinan in Guizhou to Qujing in Yunnan,the last from Wenshan in Yunnan to Baise in Guangxi. |
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| Keywords: | rocky desertification Karst remote sensing upper reaches of Pearl River |
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