This function calculates an index score for groundwater storage based on precipitation surplus, infiltration at saturation, sealing risk, drainage and subsoil compaction
ind_gw_recharge(
B_LU_BRP,
D_PSP,
D_WRI_K,
I_P_SE = NULL,
I_P_CO = NULL,
B_DRAIN,
B_GWL_CLASS,
D_SE = NULL,
B_SC_WENR = NULL,
D_P_CO = NULL
)(numeric) The crop code from the BRP
(numeric) The precipitation surplus per crop calculated by calc_psp
(numeric) The value for top soil permeability (cm/d) as calculated by calc_permeability
(numeric) The indicator value for soil sealing (deprecated)
(numeric) The indicator value for occurrence of subsoil compaction (deprecated)
(boolean) Are drains installed to drain the field (options: yes or no)
(character) The groundwater table class
(numeric) The value of soil sealing calculated by calc_sealing_risk
(character) The risk for subsoil compaction as derived from risk assessment study of Van den Akker (2006)
(numeric) Compaction value based on visual soil assessment (see Details)
The evaluated score for the soil function to improve groundwater recharge. A numeric value between 0 and 1.
Soil compaction risk can be assessed either with the soilcompaction risk map (B_SC_WENR) or visual soil assessment (VSA) (D_P_CO). D_P_CO itself is calculated from the VSA scoring of earthworms, compaction, rooting depth, and puddling: D_P_CO = (3 x A_EW_BCS + 3 x A_SC_BCS + 3 x A_RD_BCS - 2 x A_P_BCS - A_RT_BCS)/18 where the .*_BCS variables have the values 0, 1, or 2. When both B_SC_WENR and D_P_CO are provided, D_P_CO is used as it is considered more accurate determination of compaction.
ind_gw_recharge(B_LU_BRP = 265, D_PSP = 200, D_WRI_K = 10, B_DRAIN = FALSE,
B_GWL_CLASS = 'V', D_SE = 2, B_SC_WENR = 'Groot')
#> [1] 0.1956209
ind_gw_recharge(B_LU_BRP = 233, D_PSP = 400, D_WRI_K = 10, B_DRAIN = TRUE,
B_GWL_CLASS = 'II', D_SE = 5, D_P_CO = 0.2)
#> [1] 0.636955