Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2018, Vol. 34 ›› Issue (7): 124-133.doi: 10.11924/j.issn.1000-6850.casb16120072

Special Issue: 现代农业发展与乡村振兴 农业气象

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Agro-meteorological Drought Disaster: Risk Zoning in Bazhong Based on GIS

  

  • Received:2016-12-15 Revised:2017-09-20 Accepted:2017-09-25 Online:2018-03-07 Published:2018-03-07

Abstract: The paper aims to improve risk management and decision- making level of arid meteorological disaster, and reduce the loss caused by disasters. Based on the meteorological observation data and historical drought disaster data of Bazhong and its surrounding cities and counties during l981-20l5, and according to drought period, the drought disasters were divided into spring drought, summer drought, midsummer drought, autumn and winter drought. Based on GIS, the authors utilized the meteorological, social and natural data, disaster prevention and mitigation data, as well as 1:50000 geographic information data, to map the drought disaster risk zoning map in Bazhong by using the natural disaster risk assessment, risk index method, GIS natural breakpoint method, and weighted comprehensive evaluation method. The results showed that: the risk of agro- meteorological drought in Bazhong had a decreasing trend from the north to the south, and high altitude, small density of river network and low economic development level were the main reasons of higher risk.