Using SWAT Model to Estimate the Water Balance of Wadi Al-Mohammadi Basin, Western Iraq: Setup of SWAT Model, SWAT Model Run, Watershed Delineation, Climate Data, Quantification of Hydrological Components, and Water Balance of the Wadi Al-Mohammadi Basin.

Mahmood H. D. Al-Kubaisi; Qusai Y. S. Al-Kubaisi

doi:10.24996/ijs.2023.64.3.21

Authors

Mahmood H. D. Al-Kubaisi Department of Applied Geology, College of Science, University of Anbar, Ramadi, Iraq https://orcid.org/0000-0003-1339-5729
Qusai Y. S. Al-Kubaisi Department of Geology, College of Science, University of Baghdad, Baghdad, Iraq

DOI:

https://doi.org/10.24996/ijs.2023.64.3.21

Keywords:

SWAT, Water Balance, Wadi Al-Mohammadi, Hydrological Components, Western Desert

Abstract

Water balance as a technique is considered one of the means that is relied upon in solving significant hydrological problems. The soil and water assessment tool (SWAT) model was used in this study to assess the water balance in the Wadi Al-Mohammadi basin located at the eastern edge of the Western Desert. Digital elevation model, soil data, Land use - Land cover, and climate data represent the most important requirements for the SWAT model's input as a database. The Wadi Al-Mohammadi basin delineation results show the overall drainage area was 2286.8 km² with seven sub-basins. The trend line of climate data indicates a clear increase in the total rainfall, relative humidity, temperature, and solar radiation from 1990-2020, while the wind speed decreased during the observed period. The average monthly hydrological components (precipitation, actual evapotranspiration, surface runoff, lateral flow, and deep aquifer recharge) representing the basin's water balance are 68.8 mm, 67 mm, 2.03 mm, 0.02 mm, and 0 mm, respectively.