Modelling of Sub-Grid Processes
in a meso-scale hydrological
model
by
E.D. Soulis and F. Seglenieks
University of Waterloo
Department of Civil Engineering
Objectives for IP3
• Integrate process studies
• Parameterize sub-grid processes for MESH
• Establish a common framework for the
microscale hydrology
• Develop physically based parameters that
are transferable to ungauged basins
Modelling Strategy
Soil moisture & temperature: wetland
Pine Forest
30
20
10
0
-10
-20
-30
1
Wetland
40
Temperature Soil Layer 1
0
-20
-40
1994
1995
1996
1997
Ice Content Soil Layer 1
1
0.8
0.8
0.6
0.6
0.4
0.4
0.2
0.2
1994
1995
1996
1997
1996
1997
1996
1997
1996
1997
1996
1997
1996
1997
Ice Content Soil Layer 1
0
0
10
Temperature Soil Layer 1
20
1994
1995
1996
1997
20
1994
1995
Temperature Soil Layer 2
Temperature Soil Layer 2
10
0
0
-10
-10
-20
-20
1994
0.4
1995
1996
1997
Ice Content Soil Layer 2
1994
0.8
0.3
0.6
0.2
0.4
0.1
0.2
1995
Ice Content Soil Layer 2
0
0
1994
1995
1996
1997
0
1994
Temperature Soil Layer 3
Temperature Soil Layer 3
-1
1995
1
-2
0
-3
-4
-1
-5
1994
1995
1996
1994
1997
1995
0.8
0.4
Ice Content Soil Layer 3
Ice Content Soil Layer 3
0.3
0.6
0.2
0.4
0.1
0.2
0
1994
1995
1996
1997
1994
1995
What we need from other IP3
researchers
• Validation of internal variables
• Ideas for new processes to model
• Parameterizations
• Ability to use calibration of other objective
functions in addition to streamflow
Scotty Creek Preliminary Results
• Scotty Creek hydrograph
12
8
Measured
6
Modelled
4
2
Day of year
230
203
176
149
122
95
68
41
14
353
326
299
272
0
245
Flow (cms)
10
Scotty Creek Preliminary Results
30
20
10
0
-10
-20
-30
0.8
Temperature Soil Layer 1
Soil Temperature Layer 1
1994
1995
Ice Content Soil Layer 1
Soil Moisture (liquid – Blue, solid –
Black) Layer 1
0.6
0.4
0.2
0
20
1994
1995
Temperature Soil Layer 2
10
Soil Temperature Layer 2
0
-10
-20
1994
0.8
1995
Ice Content Soil Layer 2
0.6
0.4
0.2
0
1994
1995
Soil Moisture (liquid – Blue, solid –
Black) Layer 1
1
Temperature Soil Layer 3
Soil Temperature Layer 3
0
-1
1994
1995
1
Ice Content Soil Layer 3
0.8
0.6
0.4
0.2
1994
1995
Soil Moisture (liquid – Blue, solid –
Black) Layer 1
Temperature
Scotty Creek Preliminary Results
20.00
15.00
10.00
5.00
0.00
5.00
10.00
15.00
20.00
25.00
30.00
Soil Temperature
Measured Layer 2
Model Layer 2
1
25 49 73 97 121 145 169 193 217 241 265 289 313 337 361
Soil Moisture
Day
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1-Sep
Soil Moisture
30-Nov
28-Feb
Day
29-May
27-Aug
Scotty Creek Preliminary Results
Surface water temperature – Scotty Creek
June 25, 2005 – August 1, 2005
25
20
15
10
Measured (Quinton and Hayashi)
WATFLOW
5
1721
1635
1549
1463
1377
1291
1205
1119
1033
947
861
775
689
603
517
431
345
259
173
87
1
0
Wolf Creek Preliminary Results
Snow water equivalent (mm)
Snow water equivalent in the Wolf
Creek Basin
250
200
150
100
50
0
96
97
98
Date
Measured snow water equivalent
Simulated snow water equivalent
99
Next Steps
• Move down the slope from meso scale to
process scale
• Set up MESH in research basins
• Reduce set of optimization parameters
using remote sensing
Wolf Creek Preliminary Results
Water content fraction in the upper
soil layer in the Wolf Creek research
basin
Soil temperature in the upper soil
layer in the Wolf Creek research basin
20
Soil temperature (°C)
Water content fraction
1
0.8
0.6
0.4
0.2
0
1998
1999
Date
2000
2001
10
0
-10
-20
1997
1998
1999
Date
2000
2001
What we can provide to other
IP3 researchers
• Consistency checks of data sets
• CHRM evaluation