The Risk Assessment of Cultivated Land Damaged by Flooding Disasters in China

Abstract:

Flooding disasters not only threat the people's life and property, also affect the safety of environment resources ecosystem, which could make the destructive damage to the cultivated land resources both at quantity and quality. The cultivated land, once damaged, need to invest huge human, material and financial resources to restore its agricultural productivity. Based on analyst the formative factors of cultivated land damaged by flooding disasters, this paper selecting the restrictive factors such as, rainfall, relief amplitude, flooding disasters frequency and water system (including rivers and lakes),combing with the comprehensive evaluation method and putting forward the corresponding countermeasures. The risk of cultivated land damaged by flooding disasters in China is divided into severe risk, moderate risk and light risk level three class and nine subclasses totally. The result shows that: severe risk class covers an area of 194400 km², accounting for 15.13% of the cultivated land; Moderate risk class covers an area of 407400 km², accounting for 31.71% of the cultivated land area; Mild risk class covers an area of 682900 km², accounting for 53.16% of the cultivated land area. Making a risk grading evaluation to the cultivated land damaged by flooding disasters provides the basic theory basis for flooding disaster prevention, disaster relief, land consolidation planning and the establishment of basic farmland construction standards.

• Periodical: Advanced Materials Research (Volumes 1092-1093)
• Pages: 1264-1274
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1092-1093.1264
• Online since: March 2015
• Authors: Jun Liu, Wei Wang, Dong Ai*, Rong Qun Zhang, Wen Jie Hou
• Keywords: Cultivated Land Damaged by Flooding Disasters, Degree of Membership, Flooding Disasters, Hazard Degree Assessment, Limiting Factor

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