Journal of Geo-information Science >
Distribution Characteristics of Historical Mountain Flood in China
Received date: 2017-07-10
Request revised date: 2017-08-28
Online published: 2017-12-25
Copyright
Mountain flood is difficult to predict and distributes differently. It is one of the major natural disasters in China. Analysis on the distribution characteristics of mountain flood is helpful to disaster prevention. This paper takes historical mountain flood disaster points as based-data and analyzes the relation between disaster points and altitude, rainfall (H6-50), altitude standard deviation in different geomorphologic zones. Results shows that among the 6 geomorphologic zones, the historical mountain flood disasters mainly distribute in zone II and zone V, nearly 60% of the whole disasters. Also, density of mountain flood disaster reaches its high point with rainfall (H6-50) ranging from 240 to 280 mm, altitude standard smaller than 30 m. With the increase of rainfall (H6-50), the mountain flood density tends to increase first and then decline, taking 280 mm as a turning point. What’s more, the mountain flood density reaches its climax with altitude standard smaller than 30 m. In zone I, mountain flood disaster density reaches its high point with rainfall (H6-50) ranging from 240 to 300 mm, altitude from 60 to 120 m, altitude standard smaller than 30 m. For zone II, mountain flood disaster density reaches its high point when rainfall (H6-50) ranging from 150 to 270 mm, altitude from 10 to 50 m, altitude standard smaller than 30 m. Mountain flood disaster in zone V mainly distribute in the area where rainfall (H6-50) higher than 120 mm, altitude under 600 m, altitude standard smaller than 50 m. It is clear that taking the geomorphologic zoning as an analysis unit is much better than administrative boundary.
LIU Qiangyi , CHENG Weiming , SUN Dongya , WANG Nan , FANG Yue . Distribution Characteristics of Historical Mountain Flood in China[J]. Journal of Geo-information Science, 2017 , 19(12) : 1557 -1566 . DOI: 10.3724/SP.J.1047.2017.01557
Fig. 1 Distribution of mountain flood disaster |
Fig. 2 Distribution of rainfall (H6-50) and altitude standard图2 全国雨量(H6-50)及高程标准差分布图 |
Fig. 3 Mountain flood disaster distribution based on (H6-50) and altitude standard图3 山洪灾害密度雨量(H6-50)及高程标准差分布图 |
Fig. 4 Mountain flood disaster distribution in geomorphologic zoningⅠ图4 东部平原低山丘陵大区(Ⅰ)山洪灾害分布情况 |
Fig. 5 Mountain flood disaster distribution in geomorphologic zoningⅡ图5 东南低山丘陵平原大区(Ⅱ)山洪灾害分布情况 |
Fig. 6 Mountain flood disaster distribution in geomorphologic zoning Ⅲ图6 华北-内蒙东中山高原大区(Ⅲ)山洪灾害分布情况 |
Fig. 7 Mountain flood disaster distribution in geomorphologic zoning Ⅴ图7 西南中低山高原盆地大区(Ⅴ)山洪灾害分布情况 |
The authors have declared that no competing interests exist.
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