Sand mining from the river and risks related to velocity changes and longitudinal profiles in flood times Case study: Baranduzchay river watershed, West Azerbaijan province

Document Type : پژوهشی

Authors

1 Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran

2 . Associate Professor Department of Pasture and Watershed Management, Faculty of Natural Resources, Urmia University, Urmia, Iran

Abstract

Watershed management, regardless of the role of local and state operators, will derail water and soil conservation policies and have many negative impacts and consequences in the long term. One of the water supply sources of Lake Urmia is the Baranduzchay River basin. Due to the increasing consumption behavior of the population, sand mining and exploitation of this river is increasing day by day. Due to the need and importance of flood management and flood control to prevent social and economic problems, this research was carried out with the aim of studying the effects of non-standard sand mining on the hydraulic discharge of the river. The study area is located in the Baranduzchay River in West Azerbaijan Province, Urmia County. In this research, a section of the river from the geographic coordinates 490675 UTM and 4121955 UTM (upstream) to the geographic coordinates 490995 UTM and 4125550 UTM (downstream) is examined. In this research, topographic information is used before harvesting the riverbed and riverbank materials and the triangular irregular network (TIN) is extracted to verify the elevation features using the HEC-GeoRAS plugin, which is a bridge between the hydraulic model of HEC- RAS and ArcGIS: The effects of excessive sand mining on the hydraulic and hydrological properties of the river were studied. According to the research objective, the effects of extracting 1 to 2 meters of hydraulic runoff were simulated. This research showed that when the depth of the river bed increases by one to two meters, the cross section

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References

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History

  • Receive Date: 13 October 2024
  • Revise Date: 01 January 2025
  • Accept Date: 04 January 2025

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