基于GIS的关中地区农业生产自然灾害风险综合评价研究
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周寅康, 金晓斌, 王千, 杜心栋
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Comprehensive Assessment of Natural Disaster Risk for Agricultural Production in Guanzhong Region Based on GIS
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Yin-kang ZHOU, Xiao-bin JIN, Qian WANG, Xin-dong DU
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| 表3 洪涝灾害危险度评价指标 |
| Table 3 Assessment indices of flood hazard degree |
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| 影响因素 | 等级 | 分值 | 范围 | | 历史洪灾频率 | 1 | 1.0 | 0.5% ~2.5% | | 2 | 1.2 | 2.6%~5.0% | | 3 | 1.5 | 5.1% ~7.5% | | 4 | 1.7 | 7.6% ~10.0% | | 5 | 2.0 | > 10.0% | | 高程标准差 | 1 | 1.0 | > 70.0 m | | 2 | 1.2 | 50.1 ~70.0 m | | 3 | 1.5 | 30.1 ~50.0 m | | 4 | 1.7 | 10.0 ~30.0 m | | 5 | 2.0 | < 10.0 m | | 日降暴雨 | 1 | 1.0 | < 100 mm | | 2 | 1.2 | 101~120 mm | | 3 | 1.5 | 121~140 mm | | 4 | 1.7 | 141~160 mm | | 5 | 2.0 | > 160 mm | | 距河流距离 | 1 | 1.0 | < 500 m | | 2 | 1.5 | 500 ~2000 m | | 3 | 2.0 | > 2000 m |
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