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Multiple drought episodes over the Volta basin in recent reports may lead to food insecurity and loss of revenue. However, drought studies over the Volta basin are rather generalised and largely undocumented. In this study, scientists examined the utility of standardized indicators (standardized precipitation index (SPI), standardized runoff index (SRI), standardized soil moisture index (SSI), and multivariate standardized drought index (MSDI)) and Gravity Recovery and Climate Experiment (GRACE) derived terrestrial water storage to assess hydrological drought characteristics over the basin. [Source: Science of the Total Environment]
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