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Profile photo of Hossein Hashemi

Hossein Hashemi

Researcher

Profile photo of Hossein Hashemi

Coupled modeling approach to assess climate change impacts on groundwater recharge and adaptation in arid areas : Coupled modeling approach to assess climate change impacts on groundwater recharge

Author

  • Hossein Hashemi
  • Cintia Bertacchi Uvo
  • Ronny Berndtsson

Summary, in English

The effect of future climate scenarios on surface and groundwater resources was simulated using a model- ing approach for an artificial recharge area in arid southern Iran. Future climate data for the periods of 2010–2030 and 2030–2050 were acquired from the Canadian Global Coupled Model (CGCM 3.1) for scenarios A1B, A2, and B1. These scenarios were adapted to the studied region us- ing the delta-change method. A conceptual rainfall–runoff model (Qbox) was used to simulate runoff in a flash flood prone catchment. The model was calibrated and validated for the period 2002–2011 using daily discharge data. The projected climate variables were used to simulate future runoff. The rainfall–runoff model was then coupled to a calibrated groundwater flow and recharge model (MODFLOW) to simulate future recharge and groundwater hydraulic heads. As a result of the rainfall–runoff modeling, under the B1 scenario the number of floods is projected to slightly increase in the area. This in turn calls for proper management, as this is the only source of fresh water supply in the studied region. The results of the groundwater recharge modeling showed no significant difference between present and future recharge for all scenarios. Owing to that, four abstraction and recharge scenarios were assumed to simulate the groundwater level and recharge amount in the studied aquifer. The results showed that the abstraction scenarios have the most substantial effect on the groundwater level and the continuation of current pumping rate would lead to a groundwater decline by 18 m up to 2050.

Department/s

  • Centre for Advanced Middle Eastern Studies (CMES)
  • Division of Water Resources Engineering
  • MECW: The Middle East in the Contemporary World

Publishing year

2015-10-16

Language

English

Pages

4165-4181

Publication/Series

Hydrology and Earth System Sciences

Volume

19

Issue

10

Document type

Journal article

Publisher

European Geophysical Society

Topic

  • Oceanography, Hydrology, Water Resources
  • Climate Research

Keywords

  • Climate change
  • groundwater recharge model
  • Arid area
  • adaptation

Status

Published

ISBN/ISSN/Other

  • ISSN: 1607-7938