Spatiotemporal Drought Risk Assessment Considering Resilience and Heterogeneous Vulnerability Factors: Lempa Transboundary River Basin in The Central American Dry Corridor

Drought characterization and risk assessment are of great significance due to drought’s negative impact on human health, economy, ecosystem. This paper investigates drought in the Lempa River basin Central America. We applied Standardized Evapotranspiration Deficit Index (SEDI) for hazard index (DHI) calculation. Although SEDI’s applicability is theoretically proven, it has been rarely applied. generally derived from interactions between vulnerability (DVI) indices but neglects resilience’s inherent impact. Accordingly, we propose incorporating DHI, DVI, resilience (DREI) calculate (DRI). Since system factors not equally vulnerable, i.e., they heterogeneous, our methodology applies Analytic Hierarchy Process (AHP) find weights selected DVI computation. Finally, a geometric mean method DRI Results show rise DHI during 2006–2010 that affected DRI. depict SEDI via its relationship with El Nino-La Nina Salvador’s cereal production. research provides systematic approach useful decision-makers allocate resources more smartly or intervene Risk Reduction (DRR). also those interested socioeconomic drought.