void initialise_soil_moisture_parameters(control *c, params *p) {
/*
initialise parameters, if these are not known for the site use
values derived from Cosby et al to calculate the amount of plant
available water.
*/
double *fsoil_top = NULL, *fsoil_root = NULL;
if (c->calc_sw_params) {
fsoil_top = get_soil_fracs(p->topsoil_type);
fsoil_root = get_soil_fracs(p->rootsoil_type);
/* top soil */
calc_soil_params(fsoil_top, &p->theta_fc_topsoil, &p->theta_wp_topsoil,
&p->theta_sp_topsoil, &p->b_topsoil,
&p->psi_sat_topsoil);
/* Plant available water in top soil (mm) */
p->wcapac_topsoil = p->topsoil_depth *\
(p->theta_fc_topsoil - p->theta_wp_topsoil);
/* Root zone */
calc_soil_params(fsoil_root, &p->theta_fc_root, &p->theta_wp_root,
&p->theta_sp_root, &p->b_root, &p->psi_sat_root);
/* Plant available water in rooting zone (mm) */
p->wcapac_root = p->rooting_depth * \
(p->theta_fc_root - p->theta_wp_root);
}
/* calculate Landsberg and Waring SW modifier parameters if not
specified by the user based on a site calibration */
if (p->ctheta_topsoil < -900.0 && p->ntheta_topsoil < -900.0 &&
p->ctheta_root < -900.0 && p->ntheta_root < -900.0) {
get_soil_params(p->topsoil_type, &p->ctheta_topsoil, &p->ntheta_topsoil);
get_soil_params(p->rootsoil_type, &p->ctheta_root, &p->ntheta_root);
}
/*
printf("%f\n", p->wcapac_topsoil);
printf("%f\n\n", p->wcapac_root);
printf("%f\n", p->ctheta_topsoil);
printf("%f\n", p->ntheta_topsoil);
printf("%f\n", p->ctheta_root);
printf("%f\n", p->ntheta_root);
printf("%f\n", p->rooting_depth);
exit(1); */
free(fsoil_top);
free(fsoil_root);
return;
}
void initialise_soils_sub_daily(control *c, fluxes *f, params *p, state *s) {
/*
Initialise soil water state & parameters
- We have two options: (i) simple two-layer bucket, or
- multi-layer soil model.
Currently, I'm just using the same soil type for all layers in the
multi-layer model, once it all works we can add something to allow
texture to be changes by layer/depth.
NB. get_soil_fracs, calc_soil_params, get_soil_params live in
water_balance.c
*/
double *fsoil_top = NULL, *fsoil_root = NULL;
int i;
/* site params not known, so derive them based on Cosby et al */
if (c->calc_sw_params) {
fsoil_top = get_soil_fracs(p->topsoil_type);
fsoil_root = get_soil_fracs(p->rootsoil_type);
/* top soil */
calc_soil_params(fsoil_top, &p->theta_fc_topsoil, &p->theta_wp_topsoil,
&p->theta_sp_topsoil, &p->b_topsoil,
&p->psi_sat_topsoil);
/* Plant available water in top soil (mm) */
p->wcapac_topsoil = p->topsoil_depth *\
(p->theta_fc_topsoil - p->theta_wp_topsoil);
/* Root zone */
calc_soil_params(fsoil_root, &p->theta_fc_root, &p->theta_wp_root,
&p->theta_sp_root, &p->b_root, &p->psi_sat_root);
/* Plant available water in rooting zone (mm) */
p->wcapac_root = p->rooting_depth * \
(p->theta_fc_root - p->theta_wp_root);
}
/* calculate Landsberg and Waring SW modifier parameters if not
specified by the user based on a site calibration */
if (p->ctheta_topsoil < -900.0 && p->ntheta_topsoil < -900.0 &&
p->ctheta_root < -900.0 && p->ntheta_root < -900.0) {
get_soil_params(p->topsoil_type, &p->ctheta_topsoil, &p->ntheta_topsoil);
get_soil_params(p->rootsoil_type, &p->ctheta_root, &p->ntheta_root);
}
/* Set up all the hydraulics stuff */
if (c->water_balance == HYDRAULICS) {
calc_saxton_stuff(p, fsoil_root);
for (i = 0; i < p->wetting; i++) {
s->wetting_bot[i] = 0.0;
s->wetting_top[i] = 0.0;
}
/* saturate the top layer */
s->wetting_bot[0] = s->thickness[0];
/* Initalise SW fraction - we should read this from param file */
s->initial_water = 0.0;
for (i = 0; i < p->n_layers; i++) {
s->water_frac[i] = 0.4;
s->initial_water += 1E3 * (s->water_frac[i] * s->thickness[i]);
}
/*
** The loop needs to be outside the func as we need to be able to
** calculate the soil conductance per layer and call this via
** the integration func when we update the soil water balance
*/
for (i = 0; i < p->n_layers; i++) {
f->soil_conduct[i] = calc_soil_conductivity(s->water_frac[i],
p->cond1[i], p->cond2[i],
p->cond3[i]);
}
calc_soil_root_resistance(f, p, s);
calc_soil_water_potential(f, p, s);
/* Calculate the weighted soil-water-potential */
calc_water_uptake_per_layer(f, p, s);
}
if (c->calc_sw_params) {
free(fsoil_top);
free(fsoil_root);
}
return;
}