In this article we will discuss about how to compute runoff caused due to rainfall using unit hydrograph. Introduction to Unit Hydrograph: If two identical rainfalls regarding their characteristics take place in a drainage basin having the same conditions prior to the rainfall, the runoff hydrographs from the two storms would be the same. This is the basic concept used [...]
The factors affecting the runoff are as follows: 1. Precipitation 2. Size and Shape of the Catchment Area 3. Geographical Characteristics 4. Meteorological Characteristics 5. Drainage Net 6. Other Factors. Factor # 1. Precipitation: The runoff is clearly a function of precipitation, its intensity, its duration and its coverage. More the intensity, more will be the runoff. The infiltration rate [...]
In this article we will discuss about:- 1. Meaning of Runoff 2. Process of Runoff 3. Sources or Components. Meaning of Runoff: Runoff is that part of precipitation that appears in a drainage channel as surface flow in a perennial or an intermittent from. It is that part of water, which can be used for engineering purposes and hence is [...]