Next Article in Journal
Optimal Strategy to Tackle a 2D Numerical Analysis of Non-Uniform Flow over Artificial Dune Regions: A Comparison with Bibliography Experimental Results
Next Article in Special Issue
Assessing Hydrological Vulnerability to Future Droughts in a Mediterranean Watershed: Combined Indices-Based and Distributed Modeling Approaches
Previous Article in Journal
The Improvement Effects of Different Treatment Methods of Soil Wastewater Washing on Environmental Pollution
Previous Article in Special Issue
Do Land Use Changes Balance out Sediment Yields under Climate Change Predictions on the Sub-Basin Scale? The Carpathian Basin as an Example
Open AccessArticle

Evaluation of Irrigation Water Resources Availability and Climate Change Impacts—A Case Study of Mwea Irrigation Scheme, Kenya

1
Department of Agriculture and Environment Engineering, United Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo 183-8538, Japan
2
Institute of Agriculture, Tokyo University of Agriculture and Technology, Tokyo 183-8538, Japan
3
Research Center for Climate Change, Nong Lam University, HoChiMinh 700000, Vietnam
*
Author to whom correspondence should be addressed.
Water 2020, 12(9), 2330; https://doi.org/10.3390/w12092330
Received: 10 May 2020 / Revised: 12 August 2020 / Accepted: 14 August 2020 / Published: 19 August 2020
Rice is an important cereal crop in Kenya, where it is mainly grown in the Mwea Irrigation Scheme, MIS. The serious challenges of MIS include low water use efficiency and limited available water resources. The objective of this study is to analyze the current and future irrigation water resource availability for the improvement of future water management. A Soil Water Assessment Tool (SWAT), a public domain software supported by the United States Department of Agriculture’s Agricultural Research Service in Bushland, TX, USA, was used to estimate the current and future water resources availability from the MIS’s main irrigation water supply sources (River Thiba and River Nyamindi). CropWat, a computer program developed by the Land and Water Division of the Food and Agriculture Organization (FAO), Rome, Italy, was used to estimate irrigation water requirements from 2013–2016 and into the future (2020–2060 and 2061–2099). Future climatic data for total available flow and irrigation requirement estimations were downloaded from three General Circulation Models (GCMs). The data was bias corrected and down-scaled (with observed data) using a Climate Change Toolkit, a toolkit for climate change analysis developed by the Water Weather and Energy Ecosystem, Zurich, Switzerland. The results indicated that the highest irrigation water deficits were experienced in July and August based on the existing cropping pattern. Under a proposed future pattern, estimates show that MIS will experience water deficits mainly from June to October and from January to February. This study recommends that MIS management should put into strong consideration the simulated future estimates in irrigation water availability for the improvement of water management. View Full-Text
Keywords: water resources availability; SWAT; climate change water resources availability; SWAT; climate change
Show Figures

Graphical abstract

MDPI and ACS Style

Akoko, G.; Kato, T.; Tu, L.H. Evaluation of Irrigation Water Resources Availability and Climate Change Impacts—A Case Study of Mwea Irrigation Scheme, Kenya. Water 2020, 12, 2330. https://doi.org/10.3390/w12092330

AMA Style

Akoko G, Kato T, Tu LH. Evaluation of Irrigation Water Resources Availability and Climate Change Impacts—A Case Study of Mwea Irrigation Scheme, Kenya. Water. 2020; 12(9):2330. https://doi.org/10.3390/w12092330

Chicago/Turabian Style

Akoko, George; Kato, Tasuku; Tu, Le H. 2020. "Evaluation of Irrigation Water Resources Availability and Climate Change Impacts—A Case Study of Mwea Irrigation Scheme, Kenya" Water 12, no. 9: 2330. https://doi.org/10.3390/w12092330

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop