NDLI: Water consumption of agriculture and natural ecosystems at the Amu Darya in Lebap Province, Turkmenistan

Content Provider	Springer Nature Link
Author	Thevs, Niels Ovezmuradov, Kurban Zanjani, Leila Vaziri Zerbe, Stefan
Copyright Year	2014
Abstract	The Amu Darya River is the major water source for Turkmenistan contributing 88 % to the total amount of surface water available to the country. Lebap Province harbours oases and natural riparian vegetation along the Amu Darya River. In the oases, cotton, wheat, and corn as well as fruit and vegetables are grown under irrigation. While cotton was strongly promoted during Soviet Union times, the wheat area was enlarged after independency of Turkmenistan, in order to secure food self-sufficiency. In the literature, a very high crop water requirement has been reported for cotton in Turkmenistan. In this paper, the objective is to investigate the consumptive water use, i.e. actual evapotranspiration, of the major crops cotton, wheat, and corn, the household plots, and the natural vegetation within Lebap Province of Turkmenistan. Actual evapotranspiration (ET$_{a}$) was mapped from Landsat satellite images for the vegetation seasons 2009 and 2010. Additionally, reference ET (ET$_{o}$) and crop ET (ET$_{c}$) were calculated. ET$_{a}$ for riparian (Tugai) forests and Tamarix shrubs was 907–1,043 and 239–259 mm, respectively. ET$_{a}$ for the mapped crops cotton, wheat, rice, and gardens was 485–658, 156–350, 685–935, and 416–615 mm, respectively. ET$_{o}$ was 929 and 979 mm in 2009 and 2010, respectively. ET$_{c}$ for cotton and rice was 896 mm in 2009 and 925 mm in 2010 and 1,085 mm in 2009 and 1,198 mm in 2010, respectively. The low ET$_{a}$ values are explained partly by under-estimation through the method applied, partly by low yields of the crops. There is a big gap between the amount of water taken up from the Amu Darya and the water really consumed by the irrigated crops. This low water use efficiency might be due to water losses from channels and high amounts of water needed for soil preparation, i.e. leaching of salts.
Starting Page	731
Ending Page	741
Page Count	11
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	73
Issue Number	2
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-04-26
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Irrigation Cotton Riparian forest Aral Sea Basin Central Asia Remote sensing Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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