Estiation of water balance components in paddy fields under non-flooded irrigation regimes by using excel solver
0.500
150
Precipitation
Calculated soil moisture 200
Observed soil moisture
0.450
Crop development
Mid-season Late season
0.600
50
0.550
100
0.500
0.450
0.400 Initial season Crop development
40
(b)
250
0
60
20
90
Estimated irrigation water
Estimated runoff
120
10
150
0
0
20
40
60
80
Day after transplanting
100
Irrigation (mm)
30
30
150
Precipitation
Calculated soil moisture
Observed soil moisture
Precipitation (mm)
100
0
(a)
200
Mid-season Late season
250
0
30
30
60
20
90
Estimated irrigation water
Estimated runoff
120
10
150
0
0
20
40
60
80
Day after transplanting
100
Runoff (mm)
0.550
Precipitation (mm)
50
Runoff (mm)
Soil moisture (cm3 cm)3 )
0.600
0.400 Initial season
40
(b)
Irrigation (mm)
0.650
(a)
Soil moisture (cm3 cm)3 )
0
0.650
150
Precipitation
Calculated soil moisture 200
Observed soil moisture
0.450
Crop development
Mid-season Late season
0.600
50
0.550
100
0.500
0.450
0.400 Initial season Crop development
40
(b)
250
0
60
20
90
Estimated irrigation water
Estimated runoff
120
10
150
0
0
20
40
60
80
Day after transplanting
100
Irrigation (mm)
30
30
150
Precipitation
Calculated soil moisture
Observed soil moisture
Precipitation (mm)
100
0
(a)
200
Mid-season Late season
250
0
30
30
60
20
90
Estimated irrigation water
Estimated runoff
120
10
150
0
0
20
40
60
80
Day after transplanting
100
Runoff (mm)
0.550
Precipitation (mm)
50
Runoff (mm)
Soil moisture (cm3 cm)3 )
0.600
0.400 Initial season
40
(b)
Irrigation (mm)
0.650
(a)
Soil moisture (cm3 cm)3 )
0
0.650