scholarly journals Agricultural drought risk assessment in upper progo watershed using multi-temporal landsat 8 imagery

2021 ◽  
Vol 683 (1) ◽  
pp. 012097
Author(s):  
W Widiyatmoko ◽  
Sudibyakto ◽  
E Nurjani
Keyword(s):  
Risk Assessment ◽  
Agricultural Drought ◽  
Drought Risk ◽  
Landsat 8 ◽  
Multi Temporal ◽  
Agricultural Drought Risk

scholarly journals Regional Agricultural Drought Risk Assessment Method Based on Risk Transforming Process

2021 ◽  
Author(s):  
Yanqi WEI ◽  
Yi CUI ◽  
Juliang JIN ◽  
Hiroshi ISHIDAIRA ◽  
Haichao LI ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Risk Management ◽  
Yield Loss ◽  
Agricultural Drought ◽  
Drought Risk ◽  
Risk Area ◽  
Potential Yield ◽  
Agricultural Drought Risk ◽  
Risk Curves ◽  
Drought Risk Management

Abstract Drought risk management can effectively reduce drought losses and improve drought resistance capability, of which drought risk assessment is the core issue. This study evaluated the agricultural drought risk in Huaibei Plain of Anhui Province in China by the approach of constructing drought loss risk curves and risk distribution maps. The results showed that: 1) The drought events that occurred in northern regions (Huaibei and Suzhou) were with the characteristics of high-frequency and low-intensity, while in southern regions (Huainan and Bengbu), the occurring characteristics were low-frequency, high-intensity, and long-duration. 2) Without irrigation, Fuyang was the high-risk region with more than 80% potential yield loss rate, while Huainan was the relatively low-risk area with a potential yield loss of 50%. 3) Irrigation had a significant effect on reducing drought risk loss, while the efficiency was influenced by the spatio-temporal distribution of precipitation. The irrigation scheme in study area still remains to be optimized based on the characteristics of precipitation and crop growth. This study established and practiced a quantitative framework for regional drought risk assessment by creating drought risk curves and risk maps, which have significant value in improving the regional agricultural drought risk management level.

scholarly journals Risk Assessment of Maize Drought in China Based on Physical Vulnerability

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Fang Chen ◽  
Huicong Jia ◽  
Donghua Pan
Keyword(s):  
Risk Assessment ◽  
Yield Loss ◽  
Maize Yield ◽  
Scientific Basis ◽  
Agricultural Drought ◽  
Risk Level ◽  
Drought Risk ◽  
National Scale ◽  
Agricultural Drought Risk ◽  
Disaster System

Applying disaster system theory and with reference to the mechanisms that underlie agricultural drought risk, in this study, crop yield loss levels were determined on the basis of hazards and environmental and hazard-affected entities (crops). Thus, by applying agricultural drought risk assessment methodologies, the spatiotemporal distribution of maize drought risk was assessed at the national scale. The results of this analysis revealed that the overall maize drought risk decreases gradually along a northwest-to-southeast transect within maize planting areas, a function of the climatic change from arid to humid, and that the highest yield loss levels are located at values between 0.35 and 0.45. This translates to drought risks of once in every 10 and 20 years within 47.17% and 43.31% of the total maize-producing areas of China, respectively. Irrespective of the risk level, however, the highest maize yield loss rates are seen in northwestern China. The outcomes of this study provide the scientific basis for the future prevention and mitigation of agricultural droughts as well as the rationalization of related insurance.

A Novel Method for Agricultural Drought Risk Assessment

2019 ◽  
Vol 33 (6) ◽  
pp. 2033-2047 ◽  
Author(s):  
Wei Pei ◽  
Qiang Fu ◽  
Dong Liu ◽  
Tianxiao Li ◽  
Kun Cheng ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Agricultural Drought ◽  
Drought Risk ◽  
Novel Method ◽  
Agricultural Drought Risk
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