Remote Sensing for Assessing Water Management and Irrigation Performance in the Arid Environment of the Gezira Scheme, Sudan
Remote Sensing for Assessing Water Management and Irrigation Performance in the Arid Environment of the Gezira Scheme, Sudan作者机构：Agricultural Research Corporation Wad Medani 126 Sudan Graduate School of Agricultural Science Kobe University Kobe 657-8501 Japan
出 版 物：《Journal of Environmental Science and Engineering》 (环境科学与工程（英文版）)
年 卷 期：2011年第5卷第3期
页 面：344-356页
学科分类：082802[工学-农业水土工程] 08[工学] 0828[工学-农业工程] 09[农学] 0815[工学-水利工程] 0903[农学-农业资源与环境]
主 题：Gezira Scheme evapotranspiration remote sensing irrigation performance indicators.
摘 要：The effective and efficient management of agricultural water use is crucial to enhance agricultural production to meet the demand of a rapidly growing population. The performance assessment studies are successfully used to describe the irrigation problems and provide remedial measures. In this study, the performance assessment of the twin main canals of the Gezira Scheme were examined and evaluated using a set of performance indicators. The analysis was made using 3 Landsat and 8 Modis data of 2001-2002, and results showed that the seasonal average values of water productivity, relative water supply, overall consumed ratio, depleted fraction and relative evapotranspiration were respectively 0.47, 0.72, 1.41, 0.75 and 0.57 kg·m^-3 for Gezira main canal, whereas the values for Managil main canal were 0.43, 0.54, 1.68, 0.71 and 0.50 kg·m^-3, respectively. The monthly average values of crop water deficit for Gezira and Managil were respectively 71 and 78 mm-month^-1. Considering the spatial variation in some indicators, the irrigation uniformity is deemed as poor according to Molden and Gates （1990）. The analysis also showed that the gap between water demand and supply during winter season was glaringly high （46%）.
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