WebCalculate the cost to drive between destinations in South Africa based on toll gates, distance and your car's fuel economy. WebGreenfield Runoff Rate The first steps are to identify the model parameters that are appropriate for an area of 0.5km² (50ha). The approach will differ slightly depending on …
Calculation of greenfield run-off rates – Knowledge Base
WebGreenfield runoff is usually calculated as the peak rate of runoff for a specific return period due to rainfall falling on a given area of vegetated land. There are methods which predict … Webequivalent runoff from a Greenfield site for a 1 in 100 year return period (whenever a 1 in 100 year rainfall event occurs). Greenfield runoff rates are generally 3-4 times greater … bowreach ltd
Greenfield Runoff Rate Calculation - CivilWeb Spreadsheets
WebSince the Rain Intensity data is constantly being updated by the National Oceanic and Atmospheric Administration (NOAA), this calculator also app allows the manual entry of the Rainfall Intensity, thereby allowing you to calculate per … WebJun 17, 1986 · drainage area, A, and the runoff coefficient, C, can typically be obtained without much trouble. Determination of the design rainfall intensity, i, usually requires the most effort. Example #1: Calculate the peak stormwater runoff rate from a watershed of 15 acres, with a runoff coefficient of 0.35, from a storm of intensity 2.4 in/hr. WebMar 24, 2024 · 5 litres (l) second (s) / hectare (Ha) This means that if your site is 1,000m2 (or 0.1ha) then the runoff rate for your site is 5 x 0.1 = 0.5 l/s. The greenfield runoff rate is the rate expected on an undeveloped site and is the base that needs to be maintained after site development. gun laws 50 states