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 1 岩溶槽谷区不同土地利用及坡度中石漠化的分布
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Tab. 1 1 Distribution of rocky desertification in different types of land use and slope in karst trough area
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| 坡度 | 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(%) | | 0~8° | 耕地(4591.7) | 334.1(7.3%) | 82.5(1.8%) | 17.0(2.1%) | 758.3 | 9.4 | | 林地(9602.7) | 151.6(1.6%) | 156.5(1.8%) | 4.9(0.6%) | 547.7 | 0.3 | | 草地(4666.3) | 167.9(2.2%) | 101.1(1.2%) | 7.2(0.9%) | 583.1 | 5.9 | | 未利用地(2235.3) | 265.4(2.2%) | 175.1(2.0%) | 39.8(1.3%) | 789.4 | 17.6 | | 小计 | 21096.1 | 919.1(7.7%) | 515.2(6.0%) | 100.7(12.4%) | 2678.5 | 7.0 | | 8°~15o | 耕地(7752.5) | 580.5(7.5%) | 327.1(4.2%) | 38.4(0.5%) | 1653.5 | 12.2 | | 林地(18670.2) | 212.6(1.1%) | 181.3(1%) | 16.6(0.1%) | 717.1 | 1.9 | | 草地(7914.9) | 539.6(4.7%) | 342.3(4.0%) | 72.0(8.9%) | 1663.5 | 10.5 | | 未利用地(2618.5) | 411.3(3.5%) | 219.4(2.5%) | 26.2(3.2%) | 1148.3 | 21.8 | | 小计 | 36956.2 | 1744.0(14.7%) | 1070.2(12.4%) | 153.3(18.9) | 5182.4 | 7.0 | | 15°~25o | 耕地(10786.7) | 981.2(9.1%) | 667.3(6.2%) | 31.0(0.3%) | 2938.9 | 15.6 | | 林地(17952.9) | 411.5(3.5%) | 556.8(6.5%) | 19.1(2.3%) | 1726.4 | 4.1 | | 草地(10976.8) | 496.5(4.2%) | 294.7(3.4%) | 15.4(1.9%) | 1411.5 | 7.2 | | 未利用地(4778.9) | 564.5(4.7%) | 581.0(6.7%) | 59.7(7.3%) | 2104.1 | 24.7 | | 小计 | 44495.3 | 2453.8(20.6%) | 2099.8(24.4%) | 125.1(15.4%) | 8180.9 | 9.2 | | 坡度 | 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(%) | | > 25° | 耕地(1525.0) | 679.7(6.1%) | 430.0(5.2%) | 30.5(0.2%) | 1994.3 | 15.5 | | 林地(17185.3) | 307.0(1.8%) | 209.4(1.2%) | 10.2(0.1%) | 921.4 | 3.1 | | 草地(6154.0) | 424.6(3.6%) | 299.8(3.5%) | 20.9(2.6%) | 1303.2 | 10.0 | | 未利用地(3707.3) | 249.9(2.1%) | 306.3(3.6%) | 54.2(6.7%) | 1062.9 | 17.9 | | 小计 | 28571.6 | 1661.2(14.0%) | 1245.5(9.5%) | 115.8(14.2%) | 5281.9 | 8.9 |
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