Management of Ramadi City Water Resources Using WEAP Model

Abstract

Iraq has been suffering from decreasing Euphrates discharge due to construction dams by upstream countries, and using surface irrigation system with low irrigated efficiency. The study was used water evaluation and planning (WEAP) to evaluating water requirements of Ramadi city for agricultural, domestic, and industrial. The study was improving water use of the Ramadi irrigation project by saving more water amount under the sprinkler and trickle irrigation system. Also, the study was achieved more economic returns by improving cultivated areas, and estimating crop coefficients by using the Single and Dual approach. The crops water requirements by using the Single approach were low compared with the Dual approach, except for the tomato, eggplant, and Broad bean crop, which increasing by 5%, 4%, and 17% respectively. The WEAP model was shown the gross irrigation depth of wheat ranges from 758 to 821 mm, while the net irrigation depth ranges from 417 to 452 mm for different soil textures. The total water requirements that used for agricultural purposes in current year was 111.5 million 𝑚3 /year, which equals 34.2% of Ramadi irrigation budget. In addition, the water amount were 78.78 and 13.01 million 𝑚3 /year for domestic and industrial purposes, respectively. The study suggested scenarios to improve the cultivated areas, where in the first scenario, production increasing from 39.3 to 144.57 million Kg/year and the economic returns from 16.04 to 65.25 million $/year. In the second scenario, there was increasing in production from 39.3 to 194.34 million Kg/year, and economic returns from 16.04 to 87.77 million $/year with water losing about 48.9 million 𝑚3 /year. The third scenario used sprinkler irrigation with wheat and barley, and using trickle irrigation with other crops. In the third scenario the water saving was about 47%, with increasing production from 39.3 to 335.34 million 𝑚3 /year, and achieving economic returns 151.02 million $/year.