OR/14/007 Appendix 1

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Mackay, J D, Jackson, C R, and Wang, L. 2014. AquiMod User Manual (v1.0). Nottingham, UK, British geological Survey. (OR/14/007).


List of component parameters and recommend range of values to be used.

Soil zone component parameters

FAO
Parameter (units) Description Recommend Range (variable type)
BFI (-) Catchment baseflow index 0–1 (float)
FC (-) Field capacity of the soil 0–1 (float)
WP (-) Wilting point of the soil 0–1 (float)
Zr (mm) p (-) Maximum rooting depth of catchment vegetation Depletion factor of catchment vegetation 100–3000 (float)

Unsaturated zone component parameters

Weibull
Parameter (units) Description Recommend Range (variable type)
n (-) Maximum number of time-steps taken for soil drainage to reach the groundwater >0 (integer)
k (-) Weibull shape parameter 1–7 (float)
λ (-) Weibull scale parameter >0 (float)

Saturated zone component parameters

Q3K3S1
Parameter (units) Description Recommend Range (variable type)
Δx (m) Catchment length >0 (float)
K3 (m d1 Top layer hydraulic conductivity 10-5 – 103 (float)
K2 (m d1) Middle layer hydraulic conductivity 10-5 – 103 (float)
K1 (m d1) Bottom layer hydraulic conductivity 10-5 – 103 (float)
S (%) Aquifer storage coefficient 0–1 (float)
z3 (m asl) Top outlet elevation -∞–∞ (float)
z2 (m asl) Middle outlet elevation -∞–∞ (float)
z1 (m asl) Bottom outlet elevation -∞–∞ (float)
α (-) Forces the hydraulic conductivity to increase with elevation when set to 1 0,1 (bool)