Ayers .
This module is defined in ClassAyers . It handles only unfrozen soil infiltration.
Observations
- none
Variables
- infil (mm/int) - depth of infiltration in time step, Dt – expressed as an average depth of water on an HRU.
- cuminfil (mm) - cumulative infiltration - expressed as an average depth of water on an HRU.
- runoff (mm/int) - amount of daily runoff – expressed as an equivalent depth (m3/m2).
- cumrunoff (mm) - cummulative runoff.
- meltrunoff (mm/int) - amount of interval melt runoff. .
- cummeltrunoff (mm) - cumulative interval melt runoff.
- snowinfil (mm/int) - amount of interval infiltration – expressed as an equivalent depth (m3/m2).
- cumsnowinfil (mm) - cumulative interval infiltration
- melt(mm/int) - interval melt equal to snowmeltD/Freq.
Parameters
- basin_area (km^2) - area of watershed.
- hru_area(km^2) - area of HRUs.
- texture () - 1 through 4 for texture:- 1 - coarse/medium over coarse, 2 - medium over medium, 3 - medium/fine over fine, 4 - soil over shallow bedrock..
- groundcover () - 1 through 6 for groundcover: 1 - bare soil, 2 - row crop, 3 - poor pasture, 4 - small grains, 5 - good pasture, 6 - forested..
Variable Inputs
- net_rain (mm/int) (*) - amount of rain received by the ground surface in time step, Dt. Variable available from module intcp, etc..
- snowmeltD (mm/d) (*)
Notes on Ayers.
textureproperties[texture] [groundcover] in mm/hour.
| bare soil | row crop | poor pasture | small grains | good pasture | forested | |
| 7.6 | 12.7 | 15.2 | 17.8 | 25.4 | 76.2 | coarse over coarse |
| 2.5 | 5.1 | 7.6 | 10.2 | 12.7 | 15.2 | medium over medium |
| 1.3 | 1.8 | 2.5 | 3.8 | 5.1 | 6.4 | medium/fine over fine |
| 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | soil over shallow bedrock |