Assessment of Surge Irrigation Flow Performance in Short Furrow Under Gypsiferous Soil Conditions.

M. Shihab, Ramzi; S. Ali Awjagh, Moatasem

	Assessment of Surge Irrigation Flow Performance in Short Furrow Under Gypsiferous Soil Conditions.
Journal of Tikrit University For Agriculture Sciences
Article 1, Volume 16, Issue 4, 2016, Pages 117-129
Authors
Ramzi M. Shihab; Moatasem S. Ali Awjagh
Abstract
A field experiment was conducted from 1/2/2014 to 1/6/2015 to assess the performance of surge flow irrigation compared with continuous flow in short furrow irrigation system under gypsiferous soils conditions. The experiment was established at research station of soil and water Resources Department, College of Agriculture, Tikrit University field of study was divided into 18 furrows length of 60 m. The furrow with was 0.70 m and width and 0.20 m in depth and slope was 1.0 % the end. The treatments were 1: two discharges used 0.74 and 1.1 l/ sec. 2: continuous flow irrigation and 3 : surge flow irrigation with tow cycle times, 16 and 24 min. 1/4 cycle ratio was tested for the cycle time of 16 min and 1/6 for the cycle time of 24 min. The advance and recession time was monitored at 6 points along the furrows. Also, the soil moisture content was measured at three location. In each location three depths were measured, 0.0 – 0.1, 0.1 – 0.2, and 0.2 – 0.3 m at shoulder and bollom of each furrow. The water application efficiency, distribution uniformity of water deep percolation ratio and water saving were measured. The results can summarized as follows. Time of water advance to the end of the furrow was higher for continuous compared with surge flow. For continuous flow 15.5 min for 0.74 L/ sec discharge compared with 13.2 and 12.9 min for surge flow 1/4 and 1/6 cycle ratio, respectively. Whereas , for 1.1 L/sec , the advance time was 11.0 min compared with 9.3 and 9.5 min. Surge flow irrigation caused higher water saving. The amounts from 13.3 – 15.8 % depending on discharge, cycle time, cycle ratio and furrow length. Surge flow irrigation caused a significant increasing in application efficiency. It was 81 – 88 % for surge compared with 75 – 77 % for continuous for all treatments. Surge flow irrigation caused an increasing in DU. Generally it was ranged from 78 - 88 % for surge flow compared with 78 – 80 % for continuous. Also, surge flow reduce DPR. It was 14 – 19 % and 23 – 24 % for surge and continuous flow, respectively.
Keywords
Surge Irrigation; gypsiferous soil; Performance Evaluation

Statistics Article View: 138 PDF Download: 80