Model results for filter 28AP0134_1
Output date&time dd-mm-yyyy H:M:S : 02-10-2018 10:12:41

X:  226181.29
Y:  488081.34
Surface level (m above datum):      22.40
Screen top (m above datum):      -1.60
Screen bottom (m above datum):      -3.60
Maximum head measurement frequency:   1.00
Mean of observed groundwater head:   8.43
Median of observed groundwater head:       8.46
Modeling time step (days):   1.00

Goodness of fit
Explained variance deterministic (%):      91.60
Explained variance stochastic (%):      99.38
Sum squared residuals (m2):       6.48
Ndata:    340
RMSE=root mean square error of residuals (m): 0.14
Nparameters:        5
Relative Akaike Information Criterium:     645.25
Sum squared innovations (m2):       0.48

Explaining time series
EVAP: 260_De_Bilt_EVAP_19010101_20131015
IR type: incomplete Gamma function, parameters shared with PREC
Average stress intensity (in stress unit): 0.0015
Average partial response (m): -0.0300
PREC: 672_PREC_Hellendoorn_19510101_20160731
IR type: incomplete Gamma function
Average stress intensity (in stress unit): 0.0022
Average partial response (m): 0.1207

Noise model
Noise model type:exp decay

Drainage base
Evaluatiom methode: as difference between measured head and modelled fluctuations
Drainage base level (in m above datum):       6.57

Optimized parameters
A_PIII_PREC: 1.803e+03 stdev:3.602e+01   95% conf.int.: [1.744e+03,1.862e+03]
a_PIII_PREC: 4.424e-03 stdev:4.952e-05   95% conf.int.: [4.345e-03,4.504e-03]
alfa_EXP_NOISE: 1.796e-02 stdev:1.330e-03   95% conf.int.: [1.595e-02,2.028e-02]

Correlation matrix:
              ,   A_PIII_PREC,   a_PIII_PREC,alfa_EXP_NOISE
   A_PIII_PREC,          1.00,         -0.98,          0.07
   a_PIII_PREC,              ,          1.00,         -0.08
alfa_EXP_NOISE,              ,              ,          1.00

Covariance matrix:
              ,   A_PIII_PREC,   a_PIII_PREC,alfa_EXP_NOISE
   A_PIII_PREC,        0.0004,       -0.0002,        0.0001
   a_PIII_PREC,              ,        0.0001,       -0.0001
alfa_EXP_NOISE,              ,              ,        0.0055

Derived parameters from harmonic component
n_PIII_PREC: 2.413e+00 stdev:3.534e-03 95% conf.int.: [2.406e+00,2.421e+00]
f_factor_EVAP: 8.773e-01 stdev:3.403e-03 95% conf.int.: [8.711e-01,8.847e-01]

Groundwater recharge
Mean recharge rate (m/year): 0.333 stdev:0.002 95% conf.int.: [0.329,0.337]
Mean interception+transpiration rate (m/year): 0.481 stdev:0.002 95% conf.int.: [0.477,0.485]
Evaluation period: 28-9-1982 to 29-12-1995

