Blended Drought Index: Integrated Drought Hazard Assessment in the Cuvelai-Basin
Blended Drought Index: Integrated Drought Hazard Assessment in the Cuvelai-Basin
复制标题
混合干旱指数：库韦莱盆地综合干旱危害评估
作者：
R. Luetkemeier;Lina Stein;L. Drees;S. Liehr
干旱是撒哈拉以南非洲社会面临的主要威胁之一，因为大多数人口高度依赖雨养自给农业和传统供水系统。需要查明可能受干旱影响的热点地区，以减少风险，并使日益增长的人口适应不断变化的环境。本文介绍了混合干旱指数（BDI），一个综合工具，估计干旱的影响，作为一种气候引起的灾害在半干旱的安哥拉和纳米比亚Cuvelai盆地。它包含了损害人口确保粮食和水安全能力的气象和农业干旱特征。BDI使用一个copula函数将描述降水、蒸散、土壤湿度和植被状况的通用标准化干旱指标联合收割机结合起来。对卫星遥感产品进行了处理，以分析干旱频率、严重程度和持续时间。作为初步成果，建立了一个综合干旱灾害图，在空间上描绘干旱热点。在时间上，BDI与小米/高粱产量（r = 0.51）和当地用水量（r =-0.45）相关性良好，优于传统指标。鉴于干旱对社会的多方面影响，BDI是一个简单和可转移的工具，以综合方式确定受干旱严重威胁的地区。
Drought is one of the major threats to societies in Sub-Saharan Africa, as the majority of the population highly depends on rain-fed subsistence agriculture and traditional water supply systems. Hot-spot areas of potential drought impact need to be identified to reduce risk and adapt a growing population to a changing environment. This paper presents the Blended Drought Index (BDI), an integrated tool for estimating the impact of drought as a climate-induced hazard in the semi-arid Cuvelai-Basin of Angola and Namibia. It incorporates meteorological and agricultural drought characteristics that impair the population’s ability to ensure food and water security. The BDI uses a copula function to combine common standardized drought indicators that describe precipitation, evapotranspiration, soil moisture and vegetation conditions. Satellite remote sensing products were processed to analyze drought frequency, severity and duration. As the primary result, an integrated drought hazard map was built to spatially depict drought hot-spots. Temporally, the BDI correlates well with millet/sorghum yield (r = 0.51) and local water consumption (r = −0.45) and outperforms conventional indicators. In the light of a drought’s multifaceted impact on society, the BDI is a simple and transferable tool to identify areas highly threatened by drought in an integrated manner.
带有站点的气候危害红外降水 - 一种新的环境记录，用于监测极端。
影响因子：
9.8
作者：
Funk C;Peterson P;Landsfeld M;Pedreros D;Verdin J;Shukla S;Husak G;Rowland J;Harrison L;Hoell A;Michaelsen J
通讯作者：
Michaelsen J
影响因子：
2.6
作者：
Wilhite, D. A.;Glantz, M. H.
通讯作者：
Glantz, M. H.