| Reviews of agricultural drought risk assessment |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2010.06.47 |
| Key Words: agro-drought risk drought severity hazard-bearing bodies’vulnerability |
| Author Name | Affiliation | | XU Xinchuang | Intitute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
School of Resources and Enironment Science，Xianning College, Xianning, Hubei 437100, China | | GE Quansheng | Intitute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China | | ZHENG Jingyun | Intitute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China | | LIU Chengwu | School of Resources and Enironment Science，Xianning College, Xianning, Hubei 437100, China |
|
| Hits: 215 |
| Download times: 179 |
| Abstract: |
| Review and discussion were made on the progress of agricultural drought risk assessment on three as-
pects: drought severity, drought vulnerability and models of risks assessment, with a focus on revealing the front issues and development trends of agro-drought risk assessment. It is concluded that to construct suitable indexes was the key in the assessment of drought sevenity. The recent indexes of agro-drought may be classified into three types: the indexes of moisture variation degree, the indexes of drought developing process ，and the indexes of drought spatial difference. But most of these indexes could not fully reveal the developing process of drought disasters or deeply explore the mechanism of drough, which became bottlenecks in the assessment of drought severity. Agro-drought vulnerability dominated the degree of agro-drought risks. Factors of irmigation, technology , capital, etc, played important roles in affecting agro-drought vul-nerability. Yet, it was a weak link in recent researches to quantify the response of agro-drought vulnerability to human factor such as policy, technology，insurance, etc. There were many assessment models on agricultural drought risks, but most of them couldn ' t be generally applied because of certain limitative factors, such as regional or human factors. Therefore，agricultural drought risk assessment in the future should be focused on the mechanism and process of agro-drought, emphasizing the responses of agro- drought vulnerability to the change of human factors , and improving models of agro-drought risk assessment through regional cooperation. |
|
|
|