ater Productivity Evaluation of Drip and Furrow Irrigation System (In the case of Hormat-Golina irrigation scheme)
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Date
2019-10
Authors
Journal Title
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Publisher
Addis Ababa University
Abstract
he development of irrigation scheme in Ethiopia contributes to the production of
agricultural products which enhances food security & economic growth of the country.
Hormat-Golina irrigation scheme plays a significant role in household income. Even
though both drip and furrow irrigation systems are practicing, lack of information on
balance applied irrigation water and crop water demand; and also there is no evaluation of
water productivity of drip and furrow irrigation systems at the scheme. Thus the main
objective of this study is to evaluate the water productivity of drip and furrow irrigation
systems at the scheme. The model CROPWAT 8.0 was used to estimate crop water
demand; although water productivity was evaluated as crop and economic terms for both
irrigation systems with two irrigation seasons. At the season Dec, 2017 to May, 2018 the
crop water productivity of drip was estimated as, 1.53, 1.02, 1.06 and 2.24 kg/m
for
chickpea, garlic, onion, and watermelon respectively; and 0.52, 0.66 and 1.52 kg/m
3
for
chickpea, onion, and watermelon respectively with furrow irrigation method. And also, at
the season Dec, 2018 to May, 2019 the crop water productivity of drip irrigation system
for the crops chickpea, garlic, and watermelon were determined as 1.18, 1.03 and 2.29
kg/m
3
3
respectively; and in the case of furrow irrigation system it was estimated as 0.47,
0.57, 0.64 and 1.43 kg/m
chickpea, garlic, onion, and watermelon respectively. In general,
the estimated CWP of garlic and onion from the research was lower than previous studies.
Similarly, in season Dec, 2017 to May, 2018 economic water productivity of drip irrigation
system was estimated as 0.34, 1.29, 0.41 and 1.20 $/m
3
for chickpea, garlic, onion, and
watermelon respectively; and also 0.14, 0.25 and 0.85 $/m
3
for chickpea, onion, and
watermelon respectively from furrow irrigation system. In addition, at the season Dec,
2018 to May, 2019 economic water productivity were determined as 0.4, 1.41 and 1.74
$/m
3
3
for chickpea, garlic, and watermelon respectively from drip irrigation method, and
with furrow irrigation system were determined as 0.15, 0.77, 0.31 and 1.06 $/m
for
chickpea, garlic, onion, and watermelon respectively. The EWP of this research was
similar with the previous researches. Based on thus results drip irrigation system is the
advisable method for the scheme, and further studies require to improve water
productivity.
Description
Keywords
Applied irrigation water, crop water demand, water productivity, Drip, Furrow irrigation systems