Frequency of occurrence of flow regime components: a hydrology-based approach for environmental flow assessments and water allocation for the environment

Sergio A. Salinas-Rodríguez, Rafael Sánchez-Navarro, J. Eugenio Barrios-Ordóñez

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
11 Downloads (Pure)

Abstract

Hydrological methodologies are the most efficient approaches for environmental flow (eflow) assessments. This paper presents a hydrological methodology for determining eflows in rivers with scarce development to promote proactive environmental water allocations that limit flow alteration and unsustainable water use. The analysis includes the natural intra-annual and inter-annual ranges of flow variability. Eflows are determined based on four hydrological low-flow conditions and a flood regime. The main contribution is that the flow regime components are adjusted to a four-tiered environmental objective class system based on a novel “frequency-of-occurrence” approach. The method is applied in three rivers in western Mexico with highly variable flow regimes. The eflows are largely (96%) within the central range of previous implementations, and the outcomes reveal an overall good and acceptable level of the method’s performance (for 83% of the cases R 2 ≥ 0.84, slope = 1 ± ≤ 0.2), consistent with supporting indices of flow variability.

Original languageEnglish
Pages (from-to)193-213
Number of pages21
JournalHydrological Sciences Journal
Volume66 (2021)
Issue number2
DOIs
Publication statusPublished - 2020

Keywords

  • environmental flows
  • environmental water allocation
  • flow regime
  • frequency of occurrence
  • hydrology-based method
  • variability

Fingerprint

Dive into the research topics of 'Frequency of occurrence of flow regime components: a hydrology-based approach for environmental flow assessments and water allocation for the environment'. Together they form a unique fingerprint.

Cite this