Optimum Utilization of Irrigation Water
If a crop is sown and produced under absolutely identical conditions, using different amounts of water depths, the yield is found to vary. The yield increases with water, reaches a certain maximum value and then falls down, as shown in figure. The quantity of water at which the yield is maximum, is called the optimum water depth.
Therefore, optimum utilization of irrigation generally means, getting maximum yield with any amount of water. The supplies of water to the various crops should be adjusted in such a fashion, a to get optimum benefit ratio, not only for the efficient use
1. Structural damage. Is there a danger of significant damage being caused to dams, cmbankments, canal banks or other components of the irrigation /drainage/flood control works, through the action of plants and animals (including rodents and termites) favoured by the Project?
2. Animal imbalance. Does the Project cause zoological imbalances (insects, rodents, birds and other wild animals) through habitat modification, additional food supply and shelter, extermination of predators, reduced competition or increased diseases?
The recommended approach for use of the environmental checklist (table) is to prepare a detailed description for each of the checklist items on the basis of collected information required for the purpose. Based on these descriptions, the extent of the environmental effect is assessed and a cross (x) is entered in one of the columns A to E. The total number of crosses in each column of table gives an indication of the number of responses in each category. However, these numbers should not be given strict quantitative significance in assessing the overall balance of positive and negative changes from the project since certain changes will be far more important than other .