基于GIS与地理探测器的岩溶槽谷石漠化空间分布及驱动因素分析
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王正雄,蒋勇军,张远嘱,段世辉,刘九缠,曾泽,曾思博
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Spatial distribution and driving factors of karst rocky desertification based on GIS and geodetectors
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WANG Zhengxiong,JIANG Yongjun,ZHANG Yuanzhu,DUAN Shihui,LIU Jiuchan,ZENG Ze,ZENG Sibo
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表1 0 岩溶槽谷区不同土地利用及岩性中石漠化的分布
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Tab. 1 0 Distribution of rocky desertification in different types of land use and lithology in karst trough area
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| 岩性 | 土地利用
(km2) | 轻度石漠化
(km2) | 中度石漠化
(km2) | 重度石漠化
(km2) | 总计
(km2) | 石漠化
发生率(%) | | 连续性灰岩 | 耕地(12024.1) | 1216.3(16.4%) | 1629.2(13.5%) | 196.9(1.6%) | 3042.4 | 31.6 | | 林地(10288.7) | 23.1(0.2%) | 5.9(0.1%) | 0.1(0%) | 29 | 0.3 | | 草地(12232.1) | 1977.8(9.9%) | 960.5(7.9%) | 39.0(0.3%) | 2977.2 | 18.1 | | 未利用地(5450.4) | 1121.3(20.6%) | 258.9(4.8%) | 16.6(0.3%) | 1396.8 | 25.6 | | 小计 | 39995.2 | 4338.4(36.5%) | 2854.4(33.1%) | 252.6(31.1%) | 7445.4 | 15.7 | 连续性
白云岩 | 耕地(4133.9) | 1548.3(37.5%) | 960.5(23.2%) | 98.5(2.4%) | 2607.3 | 17.0 | | 林地(8940.1) | 75.5(0.6%) | 5.8(0.1%) | 1.7(0.2%) | 83 | 0.3 | | 草地(4205.3) | 441.8(10.5%) | 213.0(5.1%) | 29.0(3.6%) | 683.7 | 4.4 | | 未利用地(1873.9) | 870.1(7.3%) | 750.4(8.7%) | 59.4(7.3%) | 1679.9 | 24.2 | | 小计 | 19153.2 | 2935.8(15.3%) | 1929.7(10.1%) | 188.5(1.0%) | 5054 | 10.7 | | 灰岩与白云岩互层 | 耕地(5086.9) | 1396.7(11.7%) | 1015.9(11.8) | 120.3(14.8%) | 2533 | 18.1 | | 林地(11001.1) | 0.8(0%) | 5.1(0.1%) | 1.9(0.2%) | 7.8 | 0.0 | | 草地(5174.9) | 524.2(4.4%) | 203.8(2.4%) | 13.4(1.6%) | 741.4 | 5.8 | | 未利用地(2305.9) | 757.7(6.4%) | 338.5(3.4%) | 84.7(10.4%) | 1181 | 20.7 | | 小计 | 23568.7 | 2679.4(22.5%) | 1563.3(18.1%) | 220.4(27.1%) | 4463.1 | 9.3 | | 碳酸盐岩夹碎屑岩 | 耕地(10662.8) | 1054.9(9.9%) | 923.3(8.7%) | 82.9(0.8%) | 2061.2 | 19.3 | | 林地(23059.5) | 18.1(0.2%) | 12.1(0.1%) | 0.0(0%) | 30.2 | 0.1 | | 草地(10847.2) | 397.9(3.3%) | 419.5(4.9%) | 28.4(3.5%) | 845.8 | 6.1 | | 未利用地(4833.3) | 470.3(9.7%) | 913.5(18.9%) | 40.2(0.8%) | 1424 | 22.9 | | 小计 | 49402.8 | 1941.2(3.9%) | 2268.4(4.6%) | 151.6(0.3%) | 4361.2 | 8.8 |
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