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Investigation of crop evapotranspiration and irrigation water requirement in the lower Amu Darya River Basin,Central Asia 总被引：1，自引：0，他引：1
Durdiev KHAYDAR CHEN Xi HUANG Yue Makhmudov ILKHOM LIU Tie Ochege FRIDAY Abdullaev FARKHOD Gafforov KHUSEN Omarakunova GULKAIYR 《干旱区科学》2021,13(1):23-39
High water consumption and inefficient irrigation management in the agriculture sector of the middle and lower reaches of the Amu Darya River Basin(ADRB)have significantly influenced the gradual shrinking of the Aral Sea and its ecosystem.In this study,we investigated the crop water consumption in the growing seasons and the irrigation water requirement for different crop types in the lower ADRB during 2004–2017.We applied the FAO Penman–Monteith method to estimate reference evapotranspiration(ET0)based on daily climatic data collected from four meteorological stations.Crop evapotranspiration(ETc)of specific crop types was calculated by the crop coefficient.Then,we analyzed the net irrigation requirement(NIR)based on the effective precipitation with crop water requirements.The results indicated that the lowest monthly ET0 values in the lower ADRB were found in December(18.2 mm)and January(16.0 mm),and the highest monthly ET0 values were found in June and July,with similar values of 211.6 mm.The annual ETc reached to 887.2,1002.1,and 492.0 mm for cotton,rice,and wheat,respectively.The average regional NIR ranged from 514.9 to 715.0 mm in the 10 Irrigation System Management Organizations(UISs)in the study area,while the total required irrigation volume for the whole region ranged from 4.2×109 to 11.6×109 m3 during 2004–2017.The percentages of NIR in SIW(surface irrigation water)ranged from 46.4%to 65.2%during the study period,with the exceptions of the drought years of 2008 and 2011,in which there was a significantly less runoff in the Amu Darya River.This study provides an overview for local water authorities to achieve optimal regional water allocation in the study area. 相似文献
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Kai Wegerich 《Irrigation and Drainage Systems》2007,21(3-4):185-195
Even though ‘equity’ appears to be the major objective on all water management levels, the concept as such and its implication
for water management are hardly explored within the professional water debate. Utilizing different arguments from the public
sector, management and psychology debates, it is argued that the concept of equity is often undefined and usually ambiguous.
The paper goes on to explore aspects of ‘equity’ of water allocation between the different riparian states in the Amu Darya
basin and between the different upstream and downstream provinces in Uzbekistan and districts within the Khorezm Province
of Uzbekistan. 相似文献
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M. Ibrakhimov A. Khamzina I. Forkutsa G. Paluasheva J. P. A. Lamers B. Tischbein P. L. G. Vlek C. Martius 《Irrigation and Drainage Systems》2007,21(3-4):219-236
Groundwater (GW) management is an essential element in irrigated agriculture. This paper analyzes the temporal dynamics of
GW table and salinity in Khorezm, a region of Uzbekistan which is situated on the lower Amu Darya River in the Aral Sea Basin
and suffering from severe soil salinization. We furthermore identify the critical areas for potential soil salinization by
examining GW table and salinity measured during 1990–2000 in 1,972 wells, covering the entire region. Additionally, case studies
were performed to assess the contribution of the GW to the soil salinization on a field scale. Over the entire area, GW was
only moderately saline averaging 1.75 ± 0.99 g l−1 However, GW levels were generally very shallow averaging 148 ± 57 cm below the ground surface and thus likely to prompt secondary
soil salinization. Three case studies where GW table, soil and GW salinity were closely monitored at the field scale, suggested
that the elevated GW levels forced soil salinization by annually adding 3.5–14 t ha−1 of salts depending on the position and salinity of the GW table. Maps interpolated from the regional dataset revealed that
GW was significantly shallower and more saline in the western and southern parts of Khorezm despite the presence of a drainage
network which is rather uniformly distributed throughout the region. The results of the current study will assist the development
of an improved drainage management in Khorezm. 相似文献
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利用阿姆山省级自然保护区2019年森林资源监测数据,从土地利用类型、林地结构、土地权属、森林起源、优势树种组成、龄组等方面分析了保护区森林资源现状特点,结果表明:保护区土地利用率高,类型较为丰富,林地面积占国土面积的92.36％;保护区森林资源极其丰富,有林地占国土面积的86.13％,天然起源的森林占森林面积的97.3... 相似文献
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