Introduction to Hydrology |
From inside the book
Results 1-3 of 68
Page 188
... Direct runoff ordinates for each storm should be reduced so that each event represents 1 in . of direct runoff . 5. The final unit hydrograph of a specific duration for the watershed is obtained by averaging ordinates of selected events ...
... Direct runoff ordinates for each storm should be reduced so that each event represents 1 in . of direct runoff . 5. The final unit hydrograph of a specific duration for the watershed is obtained by averaging ordinates of selected events ...
Page 191
... direct runoff over the watershed is calculated using Σ ( DR Χ Δι ) area = ( 12.1 ) where DR is the average height of the direct runoff ordinate during a chosen time period At ( in this case At 1.5 hr ) . The values of DR determined from ...
... direct runoff over the watershed is calculated using Σ ( DR Χ Δι ) area = ( 12.1 ) where DR is the average height of the direct runoff ordinate during a chosen time period At ( in this case At 1.5 hr ) . The values of DR determined from ...
Page 230
... direct surface runoff cease if the rainfall of 2.75 in./hr had begun at 9 A.M. and had lasted for 8 hr rather than 2 ? ( f ) Determine the peak discharge rate ( cfs ) and the direct runoff ( in . ) for a uniform rainfall of 2.75 in./hr ...
... direct surface runoff cease if the rainfall of 2.75 in./hr had begun at 9 A.M. and had lasted for 8 hr rather than 2 ? ( f ) Determine the peak discharge rate ( cfs ) and the direct runoff ( in . ) for a uniform rainfall of 2.75 in./hr ...
Contents
PRECIPITATION | 15 |
INTERCEPTION AND DEPRESSION | 44 |
INFILTRATION | 55 |
Copyright | |
32 other sections not shown
Common terms and phrases
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 mi² 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