Water Demand In Agriculture

1570 Words7 Pages
INTRODUCTION
Water is becoming precious and scarce due to its increasing demand in agriculture and industrial sector. Agriculture being the mainstay of population and exploitation of available water resources to meet the agricultural need requires its scientific management. An important aspect of agricultural planning is to work out requirements of water for crops. The water requirements of crop vary widely from crop to crop and also during the entire crop growth period of individual crop. Thus estimation of crop water requirements considering the crop pattern has been an area which has attracted attention of water resources planners and engineers. The main parameter which is required to be determined for estimating the crop water requirements
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Knowledge of rainfall pattern and potential evapotranspiration (PET) is very useful to estimate the water deficit/ surplus,selection of water harvesting practices and assessing the drought proneness of the area. Expected rainfalls amount at various probability level for different time periods, monthly, weekly etc. play an important role in estimating the water deficit/surplus at different periods.
The estimation of water requirements of crop is essential for crop planning on a farm and also it is the basis on which an irrigation project is designed. The increasing demand and scarcity of water makes it important to use the available water in the most economic way. Management practices for conservation of water have been increasingly emphasizes because of sparse natural precipitation, high evapotranspiration and excessive depletion of limited ground water resources. Higher crop productivity can also be attained by proper soil, water crop management in the area with assured
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The primary objective of an irrigation project is to increase the productivity in the command area and therefore by improving the livelihood of the people. The objective can only be achieved if the canal system is properly designed and maintained to deliver a predetermined quantity of water to every field as predetermined schedule. Normally the delivery of water at outlet head was the responsibility of the water resources department and the department was not successful in its functioning due to inadequate funds for maintenance, some time ignorance about local conditions and insufficient knowledge about social network and local conditions, In view of past experiences the gap between the potential created and potential utilized was expected to be abridged by involving farmers at all the stages of water management and distribution so as to motivate them to use their local knowledge to solve the problems and have ownership feeling of the distribution system to minimize the maintenance
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