Investigation of water need based on changing irrigation patterns and its effect on the water balance of Yazd-Ardakan Plain, Iran

Document Type : Research Paper

Authors

1 Graduated Master of Watershed Engineering, Faculty of Natural Resources and Desert Studies, Yazd University

2 Associate Professor, Faculty of Natural Resources and Desert Studies, Yazd University

3 Assistant Professor, Faculty of Natural Resources and Desert Studies, Yazd University

4 Assistant Professor, Faculty of Agriculture, Payame Noor University

10.29252/aridbiom.2019.1564

Abstract

The estimation of water demand is one of the most important factors in managing water resources and the necessities of any irrigation and drainage plan. Estimation of the potential of the reference plant (ET) should be estimated to meet the water requirement. The level of utilization of surface water and underground resources in each region is directly related to the water needed to irrigate agricultural products in that area. In this study, which was conducted in the watershed of Yazd-Ardakan plain, OPTIWAT software was used to calculate the need for water. Irrigation and horticultural products of Yazd-Ardakan plain are about 54,000 ha. The water required for irrigation of these three products is 917.6 × 106 m3, which accounts for approximately 70 % of the water needed for irrigation of the total crops in the study area. The amount of water need for irrigation of crops and orchards of Yazd-Ardakan plain was achieved with current crop and current yield (45%) equal to 831.7 × 106 m3. The amount of water required for these products for drip irrigation and efficiency of 60, 75 and 90 percent were calculated 594 × 106 m3, 464.7 × 106 m3, and 382 × 106 m3, respectively. Therefore, it can be concluded that by changing the pattern of cultivation and increasing the irrigation rate, the use of the aquifer in the plain can be reduced and added to the amount of underground storage.

Keywords

References

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Journal of Arid Biome
Volume 9, Issue 1
September 2019
Pages 101-111

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