Arid Land Geography ›› 2024, Vol. 47 ›› Issue (1): 28-37.doi: 10.12118/j.issn.1000-6060.2023.283
• Climatology and Hydrology • Previous Articles Next Articles
ZHANG Jing1(),BAO Guangyu1(
),LIU Wei1,YANG Chunhua1,YAN Zhenning1,DAI Qingcuo1,FU Yongchao2
Received:
2023-06-15
Revised:
2023-08-15
Online:
2024-01-25
Published:
2024-01-26
ZHANG Jing, BAO Guangyu, LIU Wei, YANG Chunhua, YAN Zhenning, DAI Qingcuo, FU Yongchao. Characteristics and model of rainstorm and flood disaster risk index along Qinghai Highway[J].Arid Land Geography, 2024, 47(1): 28-37.
Tab. 1
Index factors, weights and data types of rainstorm flood disaster risk in Qinghai Province"
目标层因子 | 权重 | 因素层因子 | 权重 | 数据类型 | |
---|---|---|---|---|---|
致灾因子 | 0.42 | 年均小雨日数/d | 0.10 | 气象数据 | |
年均中雨日数/d | 0.30 | 气象数据 | |||
年累积强降雨日数/d | 0.60 | 气象数据 | |||
孕灾环境 | 0.25 | 地形起伏度/% | 0.26 | 环境数据 | |
河网密度/km·km-2 | 0.42 | 环境数据 | |||
植被覆盖度/% | 0.32 | 环境数据 | |||
承灾体 | 0.21 | 人口密度/人·km-2 | 0.11 | 人口密度数据 | |
地均耕地面积/m2 | 0.35 | 耕地密度数据 | |||
地均大牲畜数量/头 | 0.30 | 地均大牲畜数量 | |||
地均可利用草场面积/hm2 | 0.24 | 可利用草场面积 | |||
防灾减灾能力 | 0.12 | 人均GDP/104元·人-1 | 1.00 | 人均GDP |
Tab. 2
Classification criteria of rainstorm flood hazard risk models along highways in Qinghai Province"
等级 | 强降水 | 评估风险 | 影响建议 |
---|---|---|---|
1级 | MDRI≤0.58 | 最低风险 | 暴雨洪涝灾害风险很小,对交通无影响。 |
2级 | 0.58<MDRI≤0.61 | 次低风险 | 暴雨洪涝灾害风险较小,对交通影响不大。 |
3级 | 0.61<MDRI≤0.63 | 中等风险 | 暴雨洪涝灾害风险较大,对交通影响较大。 |
4级 | 0.63<MDRI≤0.65 | 次高风险 | 暴雨洪涝灾害风险很大,对交通运行影响很大。 |
5级 | MDRI>0.65 | 最高风险 | 暴雨洪涝灾害风险极大,对交通运行影响极大。 |
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