USING RVA MODEL FOR DEFINING RIVER ECOLOGICAL REGIME FOR DETERMINING ENVIRONMENTAL FLOW

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KHANMOHAMMADY FALLAH S.; SHOKOOHI A.

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Journal: IRAN-WATER RESOURCES RESEARCH Year:2018 | Volume:14 | Issue:2 Page(s): 224-235

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Title

USING RVA MODEL FOR DEFINING RIVER ECOLOGICAL REGIME FOR DETERMINING ENVIRONMENTAL FLOW

Author(s)

KHANMOHAMMADY FALLAH S. | SHOKOOHI A. | Issue Writer Certificate

Keywords

HYDROLOGIC METHODSQ1

HABITAT SIMULATION MODELQ1

ECOLOGICAL REGIMEQ1

RVAQ1

Abstract

In many countries, especially developing countries, due to data shortage and costly environmental studies, simple HYDROLOGIC METHODS, such as the Tenant and Q95 methods, are main methods for determining environmental flow requirements. In this study, it was shown that employing these methods could lead to results which do not comply with ecological conditions of rivers. For illustrating difficulties in providing required data for running physical HABITAT SIMULATION MODELs the River2D as a 2D hydraulic model was used. The ECOLOGICAL REGIME of the studied river resulted from River2D was completely different from the outcomes of the two aforementioned HYDROLOGIC METHODS. The RVA method was investigated based on the assumption that the method is as simple as the other HYDROLOGIC METHODS while it is capable of giving results as precise as HABITAT SIMULATION MODELs. In the case study, the situation of the river based on the suggested EF by the Tenant and Q95 methods was shown and it was illustrated that the monthly ecological flow determined via River2D was captured by the upper and lower limits of the RVA method. Moreover, it was concluded that using monthly median flow instead of mean monthly flow is preferable in the presence of skewness. Finally, it was determined that the discharges prescribed by River2D could not be supplied in all months, while the RVA minimum monthly environmental flows could satisfy all the necessary conditions for conserving biotic and abiotic habitat in the study river.

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APA: Copy

KHANMOHAMMADY FALLAH, S., & SHOKOOHI, A.. (2018). USING RVA MODEL FOR DEFINING RIVER ECOLOGICAL REGIME FOR DETERMINING ENVIRONMENTAL FLOW. IRAN-WATER RESOURCES RESEARCH, 14(2 ), 224-235. SID. https://sid.ir/paper/100345/en

Vancouver: Copy

KHANMOHAMMADY FALLAH S., SHOKOOHI A.. USING RVA MODEL FOR DEFINING RIVER ECOLOGICAL REGIME FOR DETERMINING ENVIRONMENTAL FLOW. IRAN-WATER RESOURCES RESEARCH[Internet]. 2018;14(2 ):224-235. Available from: https://sid.ir/paper/100345/en

IEEE: Copy

S. KHANMOHAMMADY FALLAH, and A. SHOKOOHI, “USING RVA MODEL FOR DEFINING RIVER ECOLOGICAL REGIME FOR DETERMINING ENVIRONMENTAL FLOW,” IRAN-WATER RESOURCES RESEARCH, vol. 14, no. 2 , pp. 224–235, 2018, [Online]. Available: https://sid.ir/paper/100345/en

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