Your search found 7 records
1 Wegerich, K. 2004. Organizational problems of water distribution in Khorezm, Uzbekistan. Water International, 29(2):130-137.
Water distribution ; Equity ; Water control ; Organizations ; Irrigation water ; Common property ; Hydrology / Uzbekistan / Khorezm
(Location: IWMI-HQ Call no: PER Record No: H035575)
2 Worbes, M.; Botman, E.; Khamzina, A.; Tupitsa, A.; Martius, C.; Lamers, J. P. A. 2006. Scope and constraints for tree planting in the irrigated landscapes of the Aral Sea Basin: case studies in Khorezm Region, Uzbekistan. Bonn, Germany: Center for Development Research. 49p. (ZEF Discussion Papers on Development Policy 112)
Lakes ; Agroforestry ; Trees ; Windbreak trees ; Forests ; Legal aspects ; Irrigated land ; Farmers attitudes ; Legal aspects / Central Asia / Uzbekistan / Aral Sea Basin / Khorezm
(Location: IWMI HQ Call no: e-copy only Record No: H041351)
http://www.zef.de/fileadmin/webfiles/downloads/zef_dp/zefdp_112.pdf
https://vlibrary.iwmi.org/pdf/H041351.pdf
https://vlibrary.iwmi.org/pdf/H041351.pdf
3 Tischbein, B.; Manschadi, A. M.; Conrad, C.; Hornidge, A.-K.; Bhaduri, A.; Ul Hassan, M.; Lamers, J. P. A.; Awan, Usman Khalid; Vlek, P. L. G. 2013. Adapting to water scarcity: constraints and opportunities for improving irrigation management in Khorezm, Uzbekistan. Water Science and Technology: Water Supply, 13(2):337-348. [doi: https://doi.org/10.2166/ws.2013.028]
Water management ; Water scarcity ; Surface water ; Groundwater resources ; Irrigation management ; Irrigation scheduling ; River basins ; Rice ; Salinity control ; Soil water ; Soil moisture ; Vegetation ; Institutions / Uzbekistan / Khorezm
(Location: IWMI HQ Call no: e-copy only Record No: H045861)
(0.36 MB)
Like many irrigation schemes in Central Asia, the one in Khorezm faces a two-fold challenge: on the one side, the severe problems inherited from the past need to be remedied and on the other side, the rising supply–demand gap driven by sharpening competition for water and climate change must be dealt with. Located in the lower part of the Amu Darya basin, Khorezm irrigation and drainage scheme is particularly vulnerable to supply–demand gaps. Promising solutions towards adaptation comprise modified strategies of land and water use towards higher efficiency and flexibility in combination with measures to lessen the constraints of the system itself, which was initially designed for the management of a few, large and uniform production units and not for many diverse and small units. Solutions consist of flexible, modeling-based approaches, re-arranging institutional settings and establishing economic incentive systems. Flexible modeling allows an integrated use of surface and groundwater resources avoiding or minimizing the impact of water stress on yield. Institutional settings strengthen the position of water users via improved participation and transparency of processes in Water Consumers Associations (WCAs). Economic measures support sustainable resource use strategies and improve the functioning of WCAs. The findings could be extrapolated to other regions of Central Asia with similar conditions and challenges.
4 Ibrakhimov, M.; Awan, U. K.; Sultanov, M.; Akramkhanov, A.; Djumaboev, Kakhramon; Conrad, C.; Lamers, J. 2019. Combining remote sensing and modeling approaches to assess soil salinity in irrigated areas of the Aral Sea Basin. Central Asian Journal of Water Research, 5(2):100-116. [doi: https://doi.org/10.29258/CAJWR/2019-R1.v5-2/64-81eng]
Soil salinization ; Irrigated land ; Remote sensing ; Modelling ; Forecasting ; Techniques ; Soil profiles ; Groundwater ; Irrigated farming ; Cotton ; Case studies / Uzbekistan / Aral Sea Basin / Khorezm
(Location: IWMI HQ Call no: e-copy only Record No: H049745)
(1.14 MB) (1.14 MB)
Accurate assessment of the soil salinization is an important step for mitigation of agricultural land degradation. Remote sensing (RS) is widely used for salinity assessment, but knowledge on prediction precision is lacking. A RS-based salinity assessment in Khorezm allows for modest reliable prediction with weak (R2=0.15–0.29) relationship of the salinity maps produced with RS and interpolation of electromagnetic EM38 during growth periods and more reliable (R2=0.35–0.56) beyond irrigation periods. Modeling with HYDRUS-1D at slightly, moderately and highly saline sites at various depths showed that irrigation forces salts to move to deeper layers: salts reappear in the upper profile during dry periods. Beyond irrigation events, salts gradually accumulated in the upper soil layers without fluctuations. Coupling RS techniques with numerical modeling provided better insight into salinity dynamics than any of these approaches alone. This should be of interest to farmers and policy makers since the combination of methods will allow for better planning and management.
5 Hamidov, A.; Khamidov, M.; Ishchanov, J. 2020. Impact of climate change on groundwater management in the northwestern part of Uzbekistan. Agronomy, 10(8):1173. (Special issue: The Adaptation of Agriculture to Climatic Change) [doi: https://doi.org/10.3390/agronomy10081173]
Groundwater management ; Climate change ; Water table ; Mineralization ; Salinity ; Air temperature ; Sustainability ; Forecasting ; Irrigated farming ; Irrigated land ; Case studies ; Models / Central Asia / Uzbekistan / Khorezm / Amu Darya River
(Location: IWMI HQ Call no: e-copy only Record No: H049959)
(1.76 MB) (1.76 MB)
Global climate change can have a significant impact on the development and sustainability of agricultural production. Climate scenarios indicate that an expected increase in air temperature in semiarid Uzbekistan can lead to an increase in evapotranspiration from agricultural fields, an increase in irrigation water requirements, and a deterioration in the ameliorative status of irrigated lands. The long-term mismanagement of irrigation practices and poor conditions of drainage infrastructure have led to an increase in the water table and its salinization level in the northwestern part of Uzbekistan. This article presents the results of an analysis of the amelioration of irrigated lands in the Khorezm region of Uzbekistan as well as the modeling of the dynamics of water table depths and salinity levels using the Mann–Kendall trend test and linear regression model. The study estimated the water table depths and salinity dynamics under the impact of climate change during 2020–2050 and 2050–2100. The results show that the water table depths in the region would generally decrease (from 1.72 m in 2050 to 1.77 m by 2100 based on the Mann–Kendall trend test; from 1.75 m in 2050 to 1.79 m by 2100 according to the linear regression model), but its salinity level would increase (from 1.72 g·L-1 in 2050 to 1.85 g·L-1 by 2100 based on the Mann–Kendall trend test; from 1.97 g·L-1 in 2050 to 2.1 g·L-1 by 2100 according to the linear regression model). The results of the study provide insights into the groundwater response to climate change and assist authorities in better planning management strategies for the region.
6 Wang, M.; Chen, X.; Sidike, A.; Cao, L.; DeMaeyer, P.; Kurban, A. 2021. Optimal allocation of surface water resources at the provincial level in the Uzbekistan Region of the Amudarya River Basin. Water, 13(11):1446. [doi: https://doi.org/10.3390/w13111446]
Surface water ; Water resources ; Water allocation ; River basins ; Water demand ; Water supply ; Water distribution ; Water use ; Livestock ; Irrigation ; Ecology ; Canals ; Economic aspects ; Models ; Optimization / Central Asia / Uzbekistan / Amudarya River Basin / Aral Sea / Kashkadarya River / Zarafshan River / Bukhara / Samarkand / Navoiy / Khorezm / Karakalpakstan / Karshi Canal
(Location: IWMI HQ Call no: e-copy only Record No: H050536)
(2.31 MB) (2.31 MB)
Water users in the Amudarya River Basin in Uzbekistan are suffering severe water use competition and uneven water allocation, which seriously threatens ecosystems, as shown, for example, in the well-known Aral Sea catastrophe. This study explores the optimized water allocation schemes in the study area at the provincial level under different incoming flow levels, based on the current water distribution quotas among riparian nations, which are usually ignored in related research. The optimization model of the inexact two-stage stochastic programming method is used, which is characterized by probability distributions and interval values. Results show that (1) water allocation is redistributed among five different sectors. Livestock, industrial, and municipality have the highest water allocation priority, and water competition mainly exists in the other two sectors of irrigation and ecology; (2) water allocation is redistributed among six different provinces, and allocated water only in Bukhara and Khorezm can satisfy the upper bound of water demand; (3) the ecological sector can receive a guaranteed water allocation of 8.237–12.354 km3; (4) under high incoming flow level, compared with the actual water distribution, the total allocated water of four sectors (except for ecology) is reduced by 3.706 km3 and total economic benefits are increased by USD 3.885B.
7 Djumaboev, Kakhramon; Amirova, I.; Primov, A.; Ishchanov, J. 2024. Farmers on the front line: perceptions, practices and discrepancies from the Aral Sea's Karakalpakstan and Khorezm regions. Irrigation and Drainage, 73(3):1102-1118. [doi: https://doi.org/10.1002/ird.2922]
Environmental factors ; Farmers ; Salinity ; Water shortages ; Water scarcity ; Groundwater / Central Asia / Aral Sea Basin / Uzbekistan / Karakalpakstan / Khorezm
(Location: IWMI HQ Call no: e-copy only Record No: H052571)
(1.56 MB)
Undesirable changes in surface water and groundwater resources and land quality for biophysical and institutional reasons will further endanger the livelihoods of people in Central Asia. The farmers' understanding of these problems and the adaptation and solution strategies they opt for are the critical variables in devising relevant policies. Our findings captured significant disparities between farmer-perceived water shortages and officially documented water availability, as well as soil salinity discrepancies. Farmers' coping strategies, including crop alterations and water-saving measures, often lead to tradeoffs, such as reduced crop yields. The study highlights the need to consider farmer perceptions and practices along with official data when designing policies. Effective policymaking must consider this dynamic interplay and the multifaceted challenges faced by farmers in these vulnerable Aral Sea regions.
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