Control the Effect of Groundwater Rising Using GIS and Multi-Criteria Decision Making Techniques in Zubair, Southern of Iraq

• Main Author: Al-Abadi, Alaa
• Format: Article
• Language: English
• Published: Union of Iraqi Geologists (UIG) 2021-04-01
• Series: Iraqi Geological Journal
• Online Access: http://igj-iraq.org/igj/index.php/igj/article/view/308

A hybrid model of two multi-criteria decision making techniques specifically, the analytical hierarchy process method and the technique for order preference by similarity to an ideal solution method was proposed to select the best site for constructing an underground dam to control the groundwater table rising or water-logging in the center of Al-Zubair city, southern Iraq. Six influencing factors were selected and prepared depending on the nature of the problem to be resolved the siting of the underground dam, and data availability. These are elevation, slope, curvature, aquifer transmissivity and specific yield, and distance to the water-logging body. Applying the hybrid system proved that approximately 50% of the study area is suitable for constructing the underground dam. Due to the expected high cost of constructing an underground dam in the study area as well as the technical challenges in implementing the project, the proposed design is digging a trench with limited width (meter or half a meter) and shallow depth (not more than 5 m) and fill the hole with an impermeable material (clay for example). It is preferred to drill wells in the headwater of the dam for pumping excess water and used it for another usage.