Next Article in Journal
Microplastics in a Stormwater Pond
Previous Article in Journal
Hydrologic Impacts of Land Use Changes in the Sabor River Basin: A Historical View and Future Perspectives
Previous Article in Special Issue
Revisiting SWAT as a Saturation-Excess Runoff Model
Open AccessArticle

Assessment of Suitable Land for Surface Irrigation in Ungauged Catchments: Blue Nile Basin, Ethiopia

1
Faculty of Civil and Water Resources Engineering, Bahir Dar Institute of Technology, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia
2
Blue Nile Water Institute, Bahir Dar University, P.O. Box 79, Bahir Dar, Ethiopia
3
Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853, USA
*
Author to whom correspondence should be addressed.
Water 2019, 11(7), 1465; https://doi.org/10.3390/w11071465
Received: 15 April 2019 / Revised: 18 June 2019 / Accepted: 8 July 2019 / Published: 15 July 2019

Planning and decision making for new irrigation development projects requires the systematic assessment of irrigable land together with available water resources. The data required are usually not available in developing countries, and therefore a method was developed for quantifying surface water resources and potentially irrigable land in ungauged watersheds in the Upper Blue Nile Basin using Soil and Water Assessment Tool (SWAT) model and Multi-Criterion Decision Evaluation (MCDE). The method was tested using the Lah river basin in the Jabitenan district and then applied in the whole area, including ungauged areas. In MCDE, soil type, slope, land use, and river proximity were considered. Onion, Cabbage and Tomato were grown on the identified irrigable areas. The predicted monthly stream discharge agreed well with observed values, with Nash and Sutcliffe efficiencies of 0.87 during calibration and 0.68 for validation. The SWAT model calibrated parameters from the gauged catchment were used to simulate the discharge of the ungauged catchments. The potential irrigable land was determined in Jabitenan woreda and included the Rivers like Birr, Tikurwuha, Gunagun, Leza Lah, Geray, Arara, Debolah, Guysa, and Silala, with an area of 460 km2. By evaluating gross irrigation demand of irrigable land with available flow in rivers (both observed and simulated), the actual surface irrigation potential was 47 km2. The main limitation for surface irrigation in all districts was the available water and not the land suitable for irrigation. Therefore, the study suggests that in order to irrigate a greater portion of the irrigable land, water should be stored during the monsoon rain phase for use in the last part of the dry phase. View Full-Text
Keywords: SWAT; Multi Criterion Decision Evaluation; Irrigation potential; Blue Nile Basin SWAT; Multi Criterion Decision Evaluation; Irrigation potential; Blue Nile Basin
Show Figures

Graphical abstract

MDPI and ACS Style

Nigussie, G.; Moges, M.A.; Moges, M.M.; Steenhuis, T.S. Assessment of Suitable Land for Surface Irrigation in Ungauged Catchments: Blue Nile Basin, Ethiopia. Water 2019, 11, 1465.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop