Acta Geographica Sinica ›› 2021, Vol. 76 ›› Issue (1): 73-86.doi: 10.11821/dlxb202101006
• Land Surface Pattern • Previous Articles Next Articles
SHI Nana(), HAN Yu, WANG Qi, HAN Ruiying, GAO Xiaoqi, ZHAO Zhiping, LIU Gaohui, XIAO Nengwen(
)
Received:
2019-12-15
Revised:
2020-10-27
Online:
2021-01-25
Published:
2021-03-25
Contact:
XIAO Nengwen
E-mail:shinn123@163.com;xiaonw@163.com
Supported by:
SHI Nana, HAN Yu, WANG Qi, HAN Ruiying, GAO Xiaoqi, ZHAO Zhiping, LIU Gaohui, XIAO Nengwen. Risk assessment of sandstorm diffusion and landscape pattern optimization in southern Xinjiang[J].Acta Geographica Sinica, 2021, 76(1): 73-86.
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Tab. 1
The evaluation standard of sandstorm diffusion factors
分级 | 风场强度(kg/m) | 干燥度 | 湿润指数 | 植被覆盖度(%) | 土壤侵蚀 |
---|---|---|---|---|---|
1 | < 50 | < 20 | 450 | > 70 | 微度 |
2 | 50~100 | 20~40 | 30~40 | 50~70 | 轻度 |
3 | 100~500 | 40~60 | 20~30 | 20~50 | 中度 |
4 | 500~1000 | 60~80 | 10~20 | 5~20 | 强度 |
5 | > 1000 | > 80 | < 10 | < 5 | 极强度 |
分级 | 土壤类型 | 土地利用 | 人口(万人) | GDP(亿元) | 农田面积 |
1 | 湖泊水库等 | 林地、建设用地 | < 8 | < 20 | 有 |
2 | 草甸土、灌淤土 | 中高覆盖度草地 | 8~15 | 20~30 | 无 |
3 | 石质土、棕漠土 | 低覆盖草地、耕地、滩地 | 15~25 | 30~60 | |
4 | 新积土、粗骨土 | 沼泽地、盐碱地 | 25~35 | 60~100 | |
5 | 风沙土 | 沙地、裸土地 | > 35 | > 100 |
Tab. 2
Load matrix of principal components
维度 | 指标 | 主成分 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||
致灾因子 | 风场强度 | -0.235 | 0.018 | -0.155 | -0.267 | -0.090 | 0.603 | -0.034 | 0.350 | 0.588 | -0.089 |
干燥度 | -0.652 | -0.199 | 0.468 | 0.090 | 0.488 | 0.165 | -0.023 | 0.027 | -0.200 | 0.021 | |
湿润指数 | -0.059 | 0.069 | 0.102 | -0.026 | 0.082 | -0.313 | -0.667 | -0.084 | 0.411 | 0.505 | |
孕灾环境 | 植被覆盖度 | 0.027 | 0.561 | -0.266 | 0.618 | 0.264 | 0.193 | -0.141 | 0.293 | -0.128 | 0.056 |
土壤侵蚀 | 0.258 | -0.182 | 0.296 | 0.542 | 0.120 | 0.084 | 0.180 | -0.345 | 0.549 | -0.210 | |
土壤类型 | 0.493 | -0.036 | 0.223 | -0.197 | 0.160 | 0.535 | -0.473 | -0.187 | -0.290 | -0.107 | |
土地利用 | 0.104 | -0.069 | 0.017 | 0.054 | -0.078 | 0.358 | 0.395 | -0.139 | -0.076 | 0.816 | |
承灾体 | 人口 | -0.043 | 0.768 | 0.467 | -0.284 | -0.067 | -0.025 | 0.219 | -0.210 | 0.099 | -0.049 |
GDP | 0.438 | -0.068 | 0.224 | -0.208 | 0.480 | -0.226 | 0.231 | 0.594 | 0.120 | 0.093 | |
耕地面积 | -0.031 | 0.081 | -0.518 | -0.280 | 0.630 | -0.020 | 0.141 | -0.462 | 0.118 | -0.026 |
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