In this article we will discuss about:- 1. Introduction to Unit Hydrograph 2. Assumptions in the Theory of Unit Hydrograph 3. Construction 4. To Develop Storm Hydrograph 5. Use 6. Limitations. Introduction to Unit Hydrograph: The basis of unit hydrograph is that if two identical rainfalls occur on a drainage basin having identical conditions prior to the rains, the hydrograph [...]
In this article we will discuss about:- 1. Units of Hydrograph 2. Area of Hydrograph 3. Complex Storm 4. Isolated Storm. A hydrograph may be defined as a graphical representation of time versus discharge. Fig 2.10. Units of Hydrograph: The unit for time on the x-axis may be: 1. Hours. 2. Days. 3. Months. This unit is selected depending upon [...]
At time, the time of excess precipitation in case of a unit hydrograph, keeping the unit precipitation the same, is required to be changed depending upon the storm period t. This time of excess precipitation may be increased or decreased. Suppose the unit hydrograph of 1 h-1 cm precipitation is available as follows: A 2 h-1 cm unit hydrograph is [...]