University of Khartoum

IRRIGATION WATER MANAGEMENT IN WAD SALMAN SCHEME - BLUE NILE, SINNAR STATE, SUDAN

IRRIGATION WATER MANAGEMENT IN WAD SALMAN SCHEME - BLUE NILE, SINNAR STATE, SUDAN

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Title: IRRIGATION WATER MANAGEMENT IN WAD SALMAN SCHEME - BLUE NILE, SINNAR STATE, SUDAN
Author: Atif Elhag Aydrous, Elhag
Abstract: This study was conducted in Wad Salman scheme near Elssuki town, Sinnar State, during 2006/2007 and 2007/2008 seasons. The objective of the study was the evaluation of the performance of the irrigation system of the scheme. The study dealt with measurement of irrigation water in the main canal, minor canals and field canals (Abu XXs and Abu VIs). Irrigation management criteria used were adequacy, equity of water distribution of the system to the different minors and field canals, dependability of the system and water use efficiency. The water discharge in the minor canals was measured using the measuring gates installed in the minors, while the discharge in the field canals was measured by a vane flowmeter. The water requirements for the cotton and sorghum crops grown in the scheme were estimated using Penman modified equation (1977) and the water use efficiencies were also determined. The results showed that minor canals received different amounts of water, which was also the case for the field canals and fields (lack of equity). So, the system did not distribute water equally between minor canals, field canals or fields. The water received at each field was more than the estimated crop water requirement. Cotton crop received 30% xv more water than its requirements, while sorghum crop received 46% more water than its requirements. The system was found to be dependable in the sense that it supplied water whenever needed. System adequacy was lower than required because adequacy depends to a large extent on the irrigation network control and measuring structures and management practices. Water use efficiency was 0.43 kg/m3 for cotton and 0.41 kg/m3 for sorghum. These figures are low taking into account the fact that rainfall was high in both seasons and a limited number of irrigations were applied. It is recommended that the canals, control and measuring structures of the net work of the system should be maintained. If the system is well managed, the result will be fewer working hours or extra area can be irrigated.
Description: 120page
URI: http://khartoumspace.uofk.edu/handle/123456789/12625
Date: 2015-06-15


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