Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (4): 163-171.DOI: 10.7522/j.issn.1000-694X.2022.00011
Yingying Wu1,3(), Zhenting Wang1,2
Received:
2021-10-09
Revised:
2022-01-19
Online:
2022-07-20
Published:
2022-08-29
CLC Number:
Yingying Wu, Zhenting Wang. Desertification sensitivity assessment in the middle and lower reaches of the Shule River Basin[J]. Journal of Desert Research, 2022, 42(4): 163-171.
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URL: http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2022.00011
指标 | 类别 | 描述 | 权重 | 参考文献 |
---|---|---|---|---|
土壤 含砂量/% | 1 | 含砂量低:<30 | 1.0 | [ |
2 | 含砂量较低:40—50 | 1.2 | ||
3 | 含砂量较高:50—60 | 1.6 | ||
4 | 含砂量高:>60 | 2.0 | ||
坡度 /(°) | 1 | 非常平缓:<6 | 1.0 | [ |
2 | 较平缓:6—18 | 1.2 | ||
3 | 较陡峭:18—35 | 1.5 | ||
4 | 非常陡峭:>35 | 2.0 | ||
有机质 含量/% | 1 | 有机质含量较高:>3 | 1.0 | [ |
2 | 有机质含量较好:2—3 | 1.3 | ||
3 | 有机质含量较低:1—2 | 1.6 | ||
4 | 有机质含量极低:<1 | 2.0 |
Table 1 Classes and assigned weights for soil indices
指标 | 类别 | 描述 | 权重 | 参考文献 |
---|---|---|---|---|
土壤 含砂量/% | 1 | 含砂量低:<30 | 1.0 | [ |
2 | 含砂量较低:40—50 | 1.2 | ||
3 | 含砂量较高:50—60 | 1.6 | ||
4 | 含砂量高:>60 | 2.0 | ||
坡度 /(°) | 1 | 非常平缓:<6 | 1.0 | [ |
2 | 较平缓:6—18 | 1.2 | ||
3 | 较陡峭:18—35 | 1.5 | ||
4 | 非常陡峭:>35 | 2.0 | ||
有机质 含量/% | 1 | 有机质含量较高:>3 | 1.0 | [ |
2 | 有机质含量较好:2—3 | 1.3 | ||
3 | 有机质含量较低:1—2 | 1.6 | ||
4 | 有机质含量极低:<1 | 2.0 |
类别 | 植被盖度/% | 权重 |
---|---|---|
1 | 高:>20 | 1.0 |
2 | 中:10—20 | 1.5 |
3 | 低:<10 | 2.0 |
Table 2 Classes and assigned weights for vegetation index[22,28]
类别 | 植被盖度/% | 权重 |
---|---|---|
1 | 高:>20 | 1.0 |
2 | 中:10—20 | 1.5 |
3 | 低:<10 | 2.0 |
指标 | 类别 | 描述 | 权重 | 参考文献 |
---|---|---|---|---|
降水量/mm | 1 | 较多:>100 | 1.0 | [ |
2 | 中:50—100 | 1.5 | ||
3 | 少:<50 | 2.0 | ||
地表温度/℃ | 1 | 低:<10 | 1.0 | — |
2 | 中:10—15 | 1.3 | ||
3 | 高:15—20 | 1.6 | ||
4 | 极高:>20 | 2.0 | ||
蒸散发量/mm | 1 | 低:<300 | 1.0 | [ |
2 | 中:300—500 | 1.5 | ||
3 | 高:>500 | 2.0 |
Table 3 Classes and assigned weights for climate indices
指标 | 类别 | 描述 | 权重 | 参考文献 |
---|---|---|---|---|
降水量/mm | 1 | 较多:>100 | 1.0 | [ |
2 | 中:50—100 | 1.5 | ||
3 | 少:<50 | 2.0 | ||
地表温度/℃ | 1 | 低:<10 | 1.0 | — |
2 | 中:10—15 | 1.3 | ||
3 | 高:15—20 | 1.6 | ||
4 | 极高:>20 | 2.0 | ||
蒸散发量/mm | 1 | 低:<300 | 1.0 | [ |
2 | 中:300—500 | 1.5 | ||
3 | 高:>500 | 2.0 |
土地利用类别 | 土地利用描述 | 权重 | 参考文献 |
---|---|---|---|
1 | 居民地、水域、沼泽地、林地、裸岩 | 1.0 | [ |
2 | 耕地、滩地、工矿用地、戈壁 | 1.2 | |
3 | 草地、盐碱地、裸土 | 1.6 | |
4 | 沙地 | 2.0 |
Table 4 Classes and assigned weights for management index
土地利用类别 | 土地利用描述 | 权重 | 参考文献 |
---|---|---|---|
1 | 居民地、水域、沼泽地、林地、裸岩 | 1.0 | [ |
2 | 耕地、滩地、工矿用地、戈壁 | 1.2 | |
3 | 草地、盐碱地、裸土 | 1.6 | |
4 | 沙地 | 2.0 |
敏感性等级 | 土地荒漠化敏感性指数DSI |
---|---|
极低 | <1.391 |
较低 | 1.391—1.515 |
较高 | 1.515—1.656 |
极高 | >1.656 |
Table 5 Classes and ranges of desertification sensitivity index
敏感性等级 | 土地荒漠化敏感性指数DSI |
---|---|
极低 | <1.391 |
较低 | 1.391—1.515 |
较高 | 1.515—1.656 |
极高 | >1.656 |
指标 | 土壤质量指数SQI | 气候质量指数CQI | 植被质量指数VQI | 管理质量指数MQI |
---|---|---|---|---|
变异系数 | 0.062 | 0.087 | 0.080 | 0.237 |
权重 | 0.133 | 0.187 | 0.172 | 0.508 |
Table 6 The variation coefficient and weights of each index
指标 | 土壤质量指数SQI | 气候质量指数CQI | 植被质量指数VQI | 管理质量指数MQI |
---|---|---|---|---|
变异系数 | 0.062 | 0.087 | 0.080 | 0.237 |
权重 | 0.133 | 0.187 | 0.172 | 0.508 |
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