Estimation of wetland-aquifer exchanges (Case Study: Kaniborazan wetland)

Document Type : Research Article


1 Assistant Professor, Department of Water Resources Engineering, Tarbiat Modares University

2 PhD Student, Department of Civil Engineering, University of Tehran

3 MSc., Department of Water Resources Engineering, Tarbiat Modares University


Surface water and groundwater interactions can occur between surface water bodies (such as rivers, lakes, and wetlands) and groundwater resources. Quantifying water exchange between a wetland and an underlying aquifer is an important task for studies in such fields as water budgets and environmental water requirements. In this study, the groundwater component from controlling factors on wetland water level is considered to determine the water requirements of Kaniborazan wetland, located at the southern part of Urmia Lake. The results of the present study indicate that during the assessment period of 1998-2015, Kaniborazan wetland has been always recharged from underlying groundwater resources considering the hydraulic gradient threshold of this wetland. These recharge values have been maximum for 1998, 2002, and 2015 with the annual value of 4.11, 5.09, and 3.78 MCM, respectively. The mean annual value of this wetland depth has been estimated to be less than 16 cm. The impacts of drainage system, channels, and traditional streams have been investigated on this wetland during the assessment period. The obtained results show that these sources have a significant effect on the water supply of the wetland. Based on the available data and information, for example for 2006 and 2015, not taking the impacts of drainage system, channels, and traditional streams on this wetland into account will lead to the wetland water volume reduction of about 15% and 30%, respectively.


Main Subjects

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Volume 4, Issue 3
September 2017
Pages 699-709
  • Receive Date: 30 December 2016
  • Revise Date: 20 April 2017
  • Accept Date: 19 April 2017
  • First Publish Date: 23 September 2017