XAJ.param.range {VIC5}

XAJ parameters

Description

The lumped XAJ model has 13 parameters, including:

• If full.UH = FALSE:

The parameter params must be a numeric vector looks like: c(KC, IM, WUM, WLM, WDM, C, B, SM, EX, KI, KG, CI, CG, N, NK)

• If full.UH = TRUE:

when use the instantaneous unit hydrograph of Nash, or looks like: c(KC, IM, WUM, WLM, WDM, C, B, SM, EX, KI, KG, CI, CG, UH_1, UH_2, ..., UH_n) UH_1, UH_2, ..., UH_n means the series of the unit hydrograph.

Usage

XAJ.param.range

Format

An object of class data.frame with 15 rows and 4 columns.

Details

Parameters:

1. KC : Ratio of potential evap to pan evap

2. IM : Fraction of impermeable area

3. WUM : Soil moisture capacity of upper layer

4. WLM : Soil moisture capacity of lower layer

5. WDM : Soil moisture capacity of deep layer

6. C : Coefficient of deep evap

7. B : Exponent of the soil moisture storage capacity curve

8. SM : Areal mean free water capacity of the surface soil layer

9. EX : Exponent of the free water capacity curve

10. KI : outflow coefficients of the free water storage to interflow

11. KG : outflow coefficients of the free water storage to groundwater

12. CI : recession constant of the lower interflow storage

13. CG : recession constant of groundwater storage.

14. N: (optional) number of reservoirs in the instantaneous unit hydrograph
    

15. NK: (optional) common storage coefficient in the instantaneous unit hydrograph
    

If full.UH = TRUE: 14~end: is the full unit hydrograph defined by user.