Data set of soil relative humidity index (2011-2015)

Water scarcity，food crises and ecological deterioration caused by drought disasters are a direct threat to food security and socio-economic development. Improvement of drought disaster risk assessment and emergency management is now urgently required. This article describes major scientific and technological progress in the field of drought disaster risk assessment. Drought is a worldwide natural disaster that has long affected agricultural production as well as social and economic activities. Frequent droughts have been observed in the Belt and Road area, in which much of the agricultural land is concentrated in fragile ecological environment. Soil relative humidity index is one of the indicators to characterize soil drought and can directly reflect the status of crops' available water.

干旱灾害引发的水资源短缺、粮食危机与生态退化，正对粮食安全及社会经济发展构成直接威胁。当前亟需提升干旱灾害风险评估与应急管理能力。本文综述了干旱灾害风险评估领域的主要科技进展。干旱作为全球性自然灾害，长期影响农业生产与社会经济活动。研究观测到“一带一路”区域干旱灾害频发，该区域内大量农业用地集中于生态脆弱地带。土壤相对湿度指数是表征土壤干旱状况的指标之一，可直接反映作物可利用水分状态。