Recoding tables 2001

Recoding tables for water and sediment flow modeling





































Rainfall events











5y ret.period,60min. 0.00001764 =63.5mm/h
1hr-rainfall 2-yr return period 25-yr return period 100-yr return period




31.3.2002 0.00000664 23.9mm/h
Raleigh 43.2mm/h 68.58mm/h 88.9mm/h




31.3.2002(Reedy Creek in Raleigh) 0.00001200 43.2mm/h






















soil texture sandy loam,gravel-sandy loam
Ks=21.8mm/h








R factor 270























Before construction, rainfall 43.2mm/h











Category # LC Description Manning n C factor rainfall [m/s] est.infiltration inf. rates rainfall excess rainfall excess Kt Dc tau_cr




[m/s] [mm] [m/s] [m/s] [mm/h]



1 wooded 0.19 0.003 0.000012 54.0 0.00001500 -0.00000300 -10.8 0.0001 0.000271 2.03
2 paved road 0.01 0.000 0.000012 0.0 0.00000000 0.00001200 43.2 0.0000 0.000000 7.00
3 young forest 0.19 0.002 0.000012 54.0 0.00001500 -0.00000300 -10.8 0.0001 0.000271 2.03
4 impermeable surface 0.01 0.000 0.000012 0.0 0.00000000 0.00001200 43.2 0.0000 0.000000 7.00
9 grass 0.1 0.040 0.000012 36.0 0.00001000 0.00000200 7.2 0.0005 0.000463 2.03
11 bare soil 0.03 0.900 0.000012 21.6 0.00000600 0.00000600 21.6 0.0008 0.000607 2.03
12 water 0.99 0.000 0.000012 0.0 0.00000000 0.00001200 43.2 0.0000 0.000000 2.03
13 dirt road 0.03 0.6 0.000012 3.0 0.00000083 0.00001117 40.2 0.0008 0.000300 2.40













Construction, removed land cover only, rainfall 43.2mm/h











Category # LC Description Manning n C factor rainfall [m/s] est.infiltration inf. rates rainfall excess rainfall excess Kt Dc tau_cr




[m/s] [mm] [m/s] [m/s] [mm/h]



1 wooded 0.19 0.003 0.000012 54.0 0.00001500 -0.00000300 -10.8 0.0001 0.000271 2.0
2 paved road 0.01 0.000 0.000012 0.0 0.00000000 0.00001200 43.2 0.0000 0.000000 7.0
3 young forest 0.19 0.002 0.000012 54.0 0.00001500 -0.00000300 -10.8 0.0001 0.000271 2.0
4 impermeable surface 0.01 0.000 0.000012 0.0 0.00000000 0.00001200 43.2 0.0000 0.000000 7.0
6 grass-rough (BARE SOIL) 0.03 1.000 0.000012 10.8 0.00000300 0.00000900 32.4 0.0008 0.000300 2.4 increase in bulk density
7 grass-teebox (BARE SOIL) 0.03 1.000 0.000012 10.8 0.00000300 0.00000900 32.4 0.0008 0.000300 2.4
8 grass-fairway (BARE SOIL) 0.03 1.000 0.000012 10.8 0.00000300 0.00000900 32.4 0.0008 0.000300 2.4
9 grass 0.1 0.040 0.000012 36.0 0.00001000 0.00000200 7.2 0.0005 0.000463 2.0
10 sandtrap (BARE SOIL) 0.03 1.000 0.000012 10.8 0.00000300 0.00000900 32.4 0.0008 0.000300 2.4
11 bare soil 0.03 0.900 0.000012 21.6 0.00000600 0.00000600 21.6 0.0008 0.000607 2.0
12 water 0.99 0.000 0.000012 0.0 0.00000000 0.00001200 43.2 0.0000 0.000000 2.0
13 dirt road 0.03 0.6 0.000012 3.0 0.00000083 0.00001117 40.2 0.0008 0.000300 2.4