Three-layer risk assessment-based drought disaster risk coping method

Abstract

The invention discloses a three-layer risk assessment drought disaster risk coping method. The method includes the following steps that: regulatable feature and regulation approach analysis is performed on drought disaster risk factors from the four aspects of dangerousness, exposure degree, vulnerability and disaster prevention and mitigation capability involved in a drought formation process; a drought disaster one-layer risk assessment system is established; a drought disaster two-layer risk assessment system is established; a drought disaster three-layer risk assessment system is established; and drought risk coping strategies are put forward. Based on historical evolution rules and future evolution trends of drought disasters, the drought disaster risk coping method is established according to drought disaster risk region division and risk prediction results from aspects such as urban population size, regional water resource carrying capacity, industrial structure adjustment, water conservancy project group optimized layout, disaster prevention and mitigation capacity construction, soil and water resource regulation and risk prevention and control management. With the method adopted, regional drought risks can be lowered level by level.

Description

technical field [0001] The invention relates to the field of drought disaster risk response, in particular to a drought disaster risk response method based on three-layer risk assessment. Background technique [0002] Under the influence of climate change and human activities, droughts around the world generally present a trend of frequent, frequent, continuous and concurrent. Since 1900, global drought disasters have killed more than 11 million people and affected more than 2 billion people. In the past 50 years, my country's meteorological disaster losses accounted for 61% of all natural disaster losses, while drought disaster losses accounted for 55% of meteorological disaster losses. Droughts not only occur in the northern regions where water resources are relatively scarce, but also frequently occur in the southern regions where water resources are relatively abundant. In recent years, large-scale and long-term drought events have occurred in the southwest and the mid...

AI Technical Summary

Problems solved by technology

However, with the intensification of climate change and the impact of human activities, the water cycle process presents an obvious “natural-artificial” dual driving characteristic. The construction of water conservancy projects and irrigation facilities has changed the temporal and spatial distribution characteristics of drought disasters in a certain area. It is difficult to reflect the multiple and complex characteristics of drought disasters

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