4/6/2024 0 Comments Storm sewer designWhere A 1,A 2…….An are the catchment areas with runoff co-efficient C 1,C 2………Cn respectively and Value C is not constant but changes (increases) with increase in duration of rainfall as the infiltration decreases.įor composite area, average value of C isĬ = (C 1A 1 + C 2A 2+ …………………. The value of C for various soils is given in tables. Planimeter is mostly used for the determination of areaĬ = runoff co-efficient representing the combine effect of percolation and evaporation. area of drainage for which the sewerage system is to be designed. Q = total amount of storm sewage (peak discharge)Ī = catchment area i.e. Rational method for stormwater runoff is very handy method for the calculation of storm water in urban areas. Hydrograph method for stormwater runoff is used for longer water sheds generally greater than 3km 2.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |