For more than a swimming area 25 sq. km. Use the guidelines to evaluate the difference in 3 ways so that they conform to the properties and risks of flooding each area receive water contains 1.) maximum flood volume measurement by means of graphs of one unit (Unit hydrograph Method) in the runoff by rain storms, together with data, graphics, nue.Nganuai-wireless port dimensions (Dimensionless Unit Hydrograph) for the area, which is not very big and is at risk of flooding from rainstorms occurred that fall within an area 2). analysis of water quantity, frequency distribution, both the maximum total watershed (Regional Flood Frequency Analysis)The application of a sculptor's relationship with water quantity area receive water in all watershed overview. Which of the project is suitable for a large water area and be at risk of flooding from runoff of water from the area and the range 3.) at the intersection of large rivers, which are located nearby water gauge station of Port Royal irrigation Department will consider data distribution analysis, measuring the actual year various iterations represent the quantity of water that is expected to occur in the scope of this area. Details on how the necessary data and analysis can explain enough in brief. As follows:
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