Journal of Natural Environment

Improvement of Habitat Simulation Method Using River2D Hydrodynamic Model to Determine Ecological Regime of River

Document Type : Research Paper

Authors

1 Department of Water Engineering, Gorgan University of Agricultural Sciences and Natural Resources

2 Gorgan university

3 water resources

Abstract

Water resources management in the basin area is increasingly associated with the allocation of environmental flows as a tool for improving the quality of ecosystem habitats in river conservation and restortion projects. In order to facilitate the estimation of the environmental flow of the Gharasoo River in Golestan province, based on the research framework after the hydrological analysis and field studies and observations, the Habitat Suitability model of the C.Capoeta gracilis species was developed and in the next step, of the flow was performed hydrodynamic modeling of the hydraulic parameters, and Finally habitat simulation and modeling with the integration of ecological and hydrodynamic studies of the flow and extracted the ecological flow regime. Based on the results of this study, C.Capoeta gracilis species in various stages of life has shown a response to changes in hydraulic parameters (depth and velocity) and flow rate, and to conservation of the ecosystem of the Gharasoo river using River2D model and variables of Habitat physics and Habitat Suitability Index of based Weighted Usable Area, Minimum and Maximum Environmental Flows are proposed to be 0.47 m3/s for the month of September and 3.03 m3/s for month of May. Results of this study showed the use of a two-dimensional hydrodynamic model for modeling the habitat desirability of the target species can recommended a tool for improving the performance of modeling in habitat simulation and implementation of the ecological river regime in river engineering projects conservation and restoration.

Keywords

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Journal of Natural Environment
Volume 72, Issue 2
June 2019
Pages 263-277