ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 42 Issue 2 > 2016,42(2):221-229. DOI:10.7519/j.issn.1000-0526.2016.02.010 Prev Next
Preliminary Study on Disastrous Law of Drought and Flood in Hubei Province
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Abstract:
Using the daily precipitation and disaster census data of 76 meteorological stations in Hubei from 1960 to 2005, this paper studied the spatiotemporal distribution and disastrous laws of drought and flood. The results show that the frequent occurrence area of drought presents an eastwest zonal distribution, while the annual occurrence frequency and area of flood are significantly less than those of drought. The annual average drought and flood disasters show opposite variation trends after 1996 in which droughts were more experienced but floods became less. Both of the two disasters concentrate in summer. In addition some areas of Hubei suffered from serious drought disaster continously from 1996 to 2001. The cumulative effect of the drought disaster caused the agricultural economic loss to be leapfrog growth, reaching the maxima in 2001. The flood disastercausing intensity is quasi periodic oscillation. The damaged areas of agriculture crops and agricultural economic losses reach maximum values in the 1990s with correlation coefficient being 0.80. So, positive correlation exists between the floodaffected population and direct economic loss. The increasing speed of direct economic losses is accelerated with increasing floodaffected population, while the abilities to prevent flood disaster are also strengthened. The droughtflood abrupt alternation mainly occurs in the northwest and southeast of Hubei in summer. During sharpturn disaster processes, as drought strengthens the vulnerability of crops and causes serious economic loss in the early period, the increasing speed of agricultural economic losses is accelerated with the growth of disasteraffected areas, but the agricultural economic loss would be less than the losses separately caused by droughts or floods.
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