Introduction to Hydrology |
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Page 177
... rain applied uniformly over the watershed in an instant of time ( see Chapter 12 ) . 11.6 TIME OF CONCENTRATION The most common definition of time of concentration originates from consid- eration of overland flow . If a uniform rain is ...
... rain applied uniformly over the watershed in an instant of time ( see Chapter 12 ) . 11.6 TIME OF CONCENTRATION The most common definition of time of concentration originates from consid- eration of overland flow . If a uniform rain is ...
Page 231
... rain began ( t = 4 ) ? ( d ) Use your response to part ( c ) to determine Q ,, as shown in the sketch . Do not scale Q , from the drawing . ( e ) Note that rain continued to fall between t = 3 and t = 3 and t = graph form a plateau ...
... rain began ( t = 4 ) ? ( d ) Use your response to part ( c ) to determine Q ,, as shown in the sketch . Do not scale Q , from the drawing . ( e ) Note that rain continued to fall between t = 3 and t = 3 and t = graph form a plateau ...
Page 351
... rainfall at a rate of 2.75 in./hr for a period of 200 min . If the runoff coefficient is 0.8 , determine the discharge rate ( cfs ) from the basin 130 min after the rain began . 15.6 . In using the rational formula ( Q = CIA ) for peak ...
... rainfall at a rate of 2.75 in./hr for a period of 200 min . If the runoff coefficient is 0.8 , determine the discharge rate ( cfs ) from the basin 130 min after the rain began . 15.6 . In using the rational formula ( Q = CIA ) for peak ...
Contents
PRECIPITATION | 15 |
INTERCEPTION AND DEPRESSION | 44 |
INFILTRATION | 55 |
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analysis annual aquifer average base flow channel Chapter coefficient computed Creek curve number Darcy's law depression storage depth determined developed direct runoff distribution drainage area drainage basin duration equation estimate evaporation evapotranspiration example factors Figure flow rate frequency function gauge graph groundwater hydraulic hydrologic hyetograph impervious increment infiltration capacity inflow input interception interflow isohyetal maximum mean measured method miĀ² normal outflow overland flow parameters peak discharge peak flow period plot precipitation probability radiation rain rainfall intensity ratio recharge record region relation reservoir River routing runoff hydrograph shown in Fig simulation models skew slope snow snowmelt snowpack soil moisture spillway standard deviation stream streamflow subarea surface runoff SWMM synthetic techniques temperature U.S. Army U.S. Department U.S. Geological Survey U.S. Weather Bureau unit hydrograph urban values variables velocity water quality water quality models Water Resources watershed zone