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- W2277774566 abstract "The issue of water losses through irrigation systems has a major impact on surface water supplies and management. Although a number of national and international organizations have attempted to assess the degree of losses from the watercourses, the impact of lining on the same command on the water losses had not been addressed. A study was carried out to assess the differences in water losses through the lined and unlined watercourses in the ricewheat area of Indus Basin of Pakistan. The selected watercourses were located in the command of Ghourdour Distributary. Therefore, it was considered that all of these watercourses would be subjected to same hydro-geologic characteristics of soil for lined or unlined options. It was observed that for the lined watercourses, the irrigation water losses ranged from 35 to 52% and for the unlined these were from 64 to 68%. Comparing the average water loss of 43.5 % Papers presented before CSBE/SCGAB meetings are considered the property of the Society. In general, the Society reserves the right of first publication of such papers, in complete form; however, CSBE/SCGAB has no objections to publication, in condensed form, with credit to the Society and the author, in other publications prior to use in Society publications. Permission to publish a paper in full may be requested from the CSBE/SCGAB Secretary, PO Box 23101, RPO McGillivray, Winnipeg MB R3T 5S3 or contact bioeng@shaw.ca. The Society is not responsible for statements or opinions advanced in papers or discussions at its meetings. from lined to the average water loss of 66% from unlined watercourses, it can be concluded that the lining reduced water loss by 22.5%. It should be emphasized that the studied watercourses were quite old with poor maintenance conditions. Lining was deteriorated badly with frequent cracks in the walls. The excess leakage of water through these watercourses was probably due to cracks, eroded mortar and structural failure of the lined walls. Moreover, the lined watercourses were raised, which accelerated the leakage phenomena. In addition, the capacity of watercourse was reduced due to silting, resulting in overtopping of flows at many locations. Consequently, the lined watercourse could not effectively save the water losses and resulted in higher water loss than the normal." @default.
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- W2277774566 date "2008-08-01" @default.
- W2277774566 modified "2023-09-27" @default.
- W2277774566 title "Lining impact on water losses in watercourses - a case study in Indus basin, Pakistan" @default.
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