Efficiency of Irrigation Associations in Gediz Basin, Turkey

Year 2017, Volume: 20 Issue: 4, 837 - 842, 20.12.2017

Barış Yılmaz , Kazım Atmaca

https://doi.org/10.2339/politeknik.369025

Cited By: 1

Abstract

This study concerns the determination of the technical
efficiency of irrigation associations (IAs) located in the Gediz Basin in
Turkey. For this purpose, 10 IAs operating in the Gediz Basin were evaluated
with the use of input oriented DEA model which considers two inputs: water
volume supplied (m³) and total irrigated area (m²), and
one output: the total value of agricultural production (TL). The assurance
region approach was used in DEA not only to include the decision makers’
preferences into the analysis, but also to limit the inappropriate input/output
weights that may affect the efficiency scores. The IAs were evaluated during
the period 2009-2011 to conclude the variation of efficiency over the study
years. The results showed that, during the study period there was an increment
in the number of efficient irrigation districts from 3 to 6. However, Gediz,
Mesir and Salihli Right Bank IAs were not able to increase their low efficiency
scores. The possible reasons of inefficiency are investigated, and the target
volume of irrigation water and irrigated area ensuring the same agricultural
production were determined. It is concluded that in inefficient IAs the same
agricultural production revenue can be achieved with approximately 60% less
water and irrigated area.

Keywords

Data Envelopment Analysis (DEA), efficiency, irrigation, weight restrictions

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