International Journal of Agricultural Policy and Research
Vol.4 (11), pp. 249-255, November 2016
Available online at https://www.journalissues.org/IJAPR/
Article 16/ID/JPR073/07/ pages
Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License.
Original Research Article
Estimation of groundwater contribution to crop water usein Kulavat irrigation command area in Khorezm, Uzbekistan
Kenjabaev Shavkat and Sultanov Murod
1Scientific Information Center Interstate Coordination Water Commission (SIC ICWC), Tashkent, Uzbekistan.
2Khorezm Rural Advisory Support Service (KRASS), Urgench, Uzbekistan
*Corresponding Author E-mail: kenjabaev(at)yahoo.com
Due to arid climate of Uzbekistan, water scarcity threatens the sustainable development of irrigated agriculture. In future, accounting all non-conventional water resources to mitigate water scarcity and to increase in-situ crop water use become main topic for most researches. In this context, groundwater evaporation (Egw) can be considered as one of the sources to meet crop-water use where the water table is shallow and groundwater salinity is low.In this study, soil texture, groundwater table depth and salinity maps are developed in geographical information system based on analyzing long-term archive data. These data then employed to estimate and map Egw through a semi-empirical approach. The results suggest that surface irrigation may be reduced considering Egw contribution ranging from 205-240 mm (e.g. light soils) to 305-360 mm (e.g. medium to heavy soils). The approach can be recommended to adjust the soil water balance in the root zone and optimize irrigation schedule.
Key words: Groundwater evaporation, groundwater table, Khorezm, soil texture