Spatiotemporal drought risk assessment considering resilience and heterogeneous vulnerability factors: Lempa transboundary river basin in the central american dry corridor

Ali Khoshnazar, Gerald A. Corzo Perez, Vitali Diaz

Research output: Contribution to journalArticleScientificpeer-review

8 Downloads (Pure)

Abstract

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

Original languageEnglish
Article number386
Pages (from-to)1-26
Number of pages26
JournalJournal of Marine Science and Engineering
Volume9
Issue number4
DOIs
Publication statusPublished - 2021

Keywords

  • Central America
  • Drought characterization
  • Drought hazard
  • Drought resilience
  • Drought risk assessment
  • Drought vulner-ability
  • Lempa River basin
  • SEDI
  • Spatiotemporal drought analysis
  • WEAP

Fingerprint Dive into the research topics of 'Spatiotemporal drought risk assessment considering resilience and heterogeneous vulnerability factors: Lempa transboundary river basin in the central american dry corridor'. Together they form a unique fingerprint.

Cite this