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Determination of water conveyance loss in the menemen open canal irrigation network
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Determination of water conveyance loss in the menemen open canal irrigation network
Phương Thi (Thy)
92
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The aim of this research was to determine water conveyance loss in the open canal irrigation network that serves the irrigation areas on the right and left banks of the Menemen Plain, in the lower part of the Gediz Basin. | Turk J Agric For 31 (2007) 11-22 © TÜB‹TAK Determination of Water Conveyance Loss in the Menemen Open Canal Irrigation Network Erhan AKKUZU*, Halil Baki ÜNAL, Bekir S›tk› KARATAfi University of Ege, Faculty of Agriculture, Department of Agricultural Structures and Irrigation, ‹zmir – TURKEY Received: 15.11.2006 Abstract: The aim of this research was to determine water conveyance loss in the open canal irrigation network that serves the irrigation areas on the right and left banks of the Menemen Plain, in the lower part of the Gediz Basin. The research was carried out in the main, secondary, and tertiary canals. Water conveyance loss in the canals was measured by the inflow-outflow method, while water velocity was determined using a current-meter. Statistical relationships between canal types, canal shapes, and seepage loss were also investigated. The water conveyance loss at the main canal level was between 0.5% and 1.3% (0.0071-0.0126 l s-1 m-2) per 1 km in the left bank main canal, and between 0.6% and 8.6% (0.0024-0.0361 l s-1 m-2) per 1 km in the right bank main canal. The average loss was 3.0% (0.0141 l s-1 m-2). At the secondary canal level the average water conveyance loss for the -1 -2 trapezoidal canals on the left bank was 2.0% (0.0615 l s m ) per 100 m and for the concrete flumes on the right bank it was 4.0% per 100 m. Average conveyance loss at the tertiary level on the left bank was 7.0% (0.0598 l s-1 m-2) per 100 m for the trapezoidal canals and 5.1% per 100 m for the concrete flumes. For the concrete flumes on the right bank the figure was 6.5% per 100 m. Based on the statistical analysis, there was no significant difference for seepage loss between secondary and tertiary – – a a canal types (X secondary = 18.600 ± 4.404 and X tertiary = 9.173 ± 3.199), but there were statistically significant (P < 0.05) differences – – a b in seepage loss between the canal shapes (trapezoidal and concrete flume) (X trapezoidal = 21.892 ± 3.664 and X concrete .
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