![]() Conveyance loss is also determined by the loss attributed to canal seepage coupled with the estimate of evaporation. Conveyance loss can be calculated in terms of the return flow from one user and the value before the withdrawal of the next user. The conveyance losses are generally higher in course- textured soil, channels having a relatively higher elevation than the surrounding land, channels that are relatively long and also channels with poor maintenance. ![]() A linear model was developed for estimating conveyance efficiency and two component factors on the basis of statistical analysis of daily water releases from the source of supply and delivery to the farmers in an irrigation district of Mexico.Ĭonveyance losses are defined as the losses due to seepage of water during the course of the canal. Enrique and John (2012) conducted a case study to estimate the conveyance efficiency within irrigation systems. The non spatial data was linked to spatial features with unique feature IDs. This involved digitization and database generation of canals, rainfall, The study was a GIS based schedule and calculation of irrigation requirements of Sone Command area. (2011) carried out a study on Patna canal system and its distribution. Conveyance losses and field application losses plays a major role in distributing the optimum amount of Irrigation Water to the fields. Losses in irrigation system lead to overall in-efficiency in terms of water productivity. This paper is a part of research work and highlights the advantages of GIS in mapping the canal network in using GIS network model, delineating the command area in to block/sub-Blocks and calculating the canal conveyance losses canal-wise and up to sub-block level with a special emphasis on canal water management. The clay soils are predominant and found 49% in the study area whereas sandy and loamy soils occupied 29% and 22% respectively. Using GIS software, the soil data base was created for the command area. Utilizing GIS network model, the total length of the canal system was identified as 155.846 km. Integrating and analyzing the multiple themes using GIS helps to assess the water requirements and optimum amount of water distribution through canals. ![]() ![]() GIS based system aids in analyzing the spatial information of a canal to enable better planning by engineers and farmers followed by effective management and supply of water resources. Calculation of these losses with respect to soil characteristics and topography is an added advantage in utilizing the optimum amount of water distribution to fields. These losses accounts more in the case of unlined canals when compared to lined canals. It is important for the irrigation engineers to initially understand and estimate the canal conveyance losses in irrigating the crops. GIS Based Approach for Calculation of Canal Conveyance LossesġResearch Scholar, Civil Engineering Department, JNTUH, Hyderabad, IndiaĢAssistant Professor, Centre for Water Resources, JNTUH, Hyderabad, India ![]()
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