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Frequency of occurrence of flow regime components: a hydrology-based approach for environmental flow assessments and water allocation for the environment
Hydrological Sciences Journal ( IF 2.8 ) Pub Date : 2020-12-16 , DOI: 10.1080/02626667.2020.1849705
Sergio A. Salinas-Rodríguez 1, 2 , Rafael Sánchez-Navarro 3 , J. Eugenio Barrios-Ordóñez 4
Affiliation  

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.



中文翻译:

流态成分出现的频率:基于水文学的方法进行环境流量评估和环境水分配

摘要

水文方法学是评估环境流量的最有效方法。本文提出了一种水文方法学,用于确定发展稀少的河流中的水流,以促进积极的环境用水分配,从而限制流量变化和不可持续的用水。该分析包括流量变化的自然年度内和年度间范围。流量是根据四个水文低流量条件和洪水状况确定的。主要贡献在于,基于新颖的“发生频率”方法,将流态成分调整为四层环境目标类别系统。该方法被应用在墨西哥西部的三条河流中,这些河流的流量变化很大。流出量大部分(96%)在先前实施方案的中心范围内,[R 2  ≥0.84,斜率= 1±≤0.2)中,用支撑流变性指数一致。

更新日期:2021-02-16
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