Optimization of equitable irrigation water delivery for a large-scale rice irrigation scheme

This study assessed farmers’ soil and irrigation water management practices, perceptions, and major constraints at Koga, a large-scale irrigation scheme in Ethiopia. Key informant interviews, structured and semi-structured questionnaires, focus group discussions, and field visits were used for data collection. Soil samples were collected for the assessment of soil properties and a comparison with the respondents’ perception of soil-related constraints. A total of 385 respondents were involved in the questionnaire. All of the respondents had a good perception of soil acidity and its management strategies. Respondents’ perception was in line with the mean soil pH, soil texture, infiltration rate, exchangeable acidity, and soil organic carbon obtained from lab analysis and field tests. Soil acidity, unwise use of water, water scarcity, and lack of market linkages hampered the performance of the Koga irrigation scheme. Yet, respondents had a low awareness of irrigation water management. Farmers never used irrigation scheduling, but apply the same amount of water regardless of the crop type. As a result, low yield and water use efficiency were reported. To reduce soil acidity, an adequate lime supply for farmers with hands-on training on how to apply it would be desirable. Farmers should be aware of how to design effective irrigation scheduling and adopt water-saving management strategies.

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Determinants of household contributions to collective irrigation management: The case of the Doho Rice Scheme in Uganda

Environment and Development Economics ◽

10.1017/s1355770x11000167 ◽

2011 ◽

Vol 16 (5) ◽

pp. 527-551 ◽

Cited By ~ 14

Author(s):

YUKO NAKANO ◽

KEIJIRO OTSUKA

Keyword(s):

Irrigation Water ◽

Large Scale ◽

Irrigation Management ◽

Irrigation Canal ◽

Irrigation Scheme ◽

Household Level ◽

Plot Size ◽

Level Data ◽

Irrigation Channels ◽

The Government

ABSTRACTIn order to explore the conditions for successful communal irrigation management, this study investigates the determinants of household contributions to the cleaning of irrigation channels and the availability of water. By using household-level data collected in a large-scale gravity irrigation scheme in Uganda, whose management was transferred from the government to the community, we find that household contributions to the cleaning of irrigation channels are determined by the scarcity of irrigation water, the opportunity cost of labor and the private benefit associated with plot size. We also find that the availability of irrigation water increases in the tertiary irrigation canal where the coefficient of variation of plot size is large, which may indicate that farmers of larger plots are particularly active in water management. These findings suggest that farmers are responsive to private benefits and, hence, the support of the government for communities to implement punishment may be effective for successful irrigation management.

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Evaluating and enhancing irrigation water management in the upper Blue Nile basin, Ethiopia: The case of Koga large scale irrigation scheme

Agricultural Water Management ◽

10.1016/j.agwat.2015.10.025 ◽

2016 ◽

Vol 170 ◽

pp. 26-35 ◽

Cited By ~ 11

Author(s):

Sisay B. Asres

Keyword(s):

Water Management ◽

Irrigation Water ◽

Large Scale ◽

Nile Basin ◽

Irrigation Scheme ◽

Blue Nile ◽

Irrigation Water Management ◽

Blue Nile Basin ◽

Upper Blue Nile Basin

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GIS user-interface based irrigation delivery performance assessment: a case study for Tanjung Karang rice irrigation scheme in Malaysia

Irrigation and Drainage Systems ◽

10.1007/s10795-011-9115-0 ◽

2011 ◽

Vol 25 (2) ◽

pp. 97-120 ◽

Cited By ~ 3

Author(s):

M. K. Rowshon ◽

M. S. M. Amin ◽

A. R. M Shariff

Keyword(s):

User Interface ◽

Performance Assessment ◽

Irrigation Scheme ◽

Delivery Performance ◽

Rice Irrigation

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Projecting Basin-Scale Distributed Irrigation and Domestic Water Demands and Values: A Generic Method for Large-Scale Modeling

Water Economics and Policy ◽

10.1142/s2382624x16500235 ◽

2016 ◽

Vol 02 (04) ◽

pp. 1650023 ◽

Cited By ~ 1

Author(s):

Noémie Neverre ◽

Patrice Dumas

Keyword(s):

Irrigation Water ◽

Large Scale ◽

Potential Evapotranspiration ◽

Demand Curve ◽

Economic Valuation ◽

Economic Value ◽

Expansion Method ◽

Domestic Water ◽

Water Demands ◽

Basin Scale

This paper presents a methodology to project irrigation and domestic water demands on a regional to global scale, in terms of both quantity and economic value. Projections are distributed at the water basin scale. Irrigation water demand is projected under climate change. It is simply computed as the difference between crop potential evapotranspiration for the different stages of the growing season and available precipitation. Irrigation water economic value is based on a yield comparison approach between rainfed and irrigated crops using average yields. For the domestic sector, we project the combined effects of demographic growth, economic development and water cost evolution on future demands. The method consists in building three-part inverse demand functions in which volume limits of the blocks evolve with the level of GDP per capita. The value of water along the demand curve is determined from price-elasticity, price and demand data from the literature, using the point-expansion method, and from water cost data. This generic methodology can be easily applied to large-scale regions, in particular developing regions where reliable data are scarce. As an illustration, it is applied to Algeria, at the 2050 horizon, for demands associated to reservoirs. Our results show that domestic demand is projected to become a major water consumption sector. The methodology is meant to be integrated into large-scale hydroeconomic models, to determine inter-sectorial and inter-temporal water allocation based on economic valuation.

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