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Workshop 2013

The scientific objective of the 2nd Integrated Hydrologic Model Intercomparison Workshop is the juxtaposition of results from simulated benchmark problems, and scientific understanding of the impact of model implementation and structure on simulation results and, thus, predictions.

The workshop will be held at the University of Bonn on June 27-28, 2013.

Venue: Stucksaal, Poppelsdorfer Schloß, 53115 Bonn, Germany

Registration: The registration is open to any interested party dealing with integrated modeling and is free of charge.

Contact: Stefan Kollet

Preliminary Program (pdf)

Day 1, June 27th

09:00 - 09:30 Welcome
09:30 - 10:15 Presentation of previous results (Maxwell et al., 2013, WRR, in review)
10:15 - 11:00 Presentation of results by the different groups (each 10 minutes) Discussion

11:00 - 11:15 Coffee break
11:15 - 12:30 Presentation of results by the different groups (each 10 minutes)
12:30 - 14:00 Lunch break
14:00 - 15:30 Presentation of results by the different groups (each 10 minutes) Discussion

15:30 - 16:00 Coffee break
16:00 - 18:00 Compilation of results and discussion

Day 2, June 28th

08:30 - 10:00 Wrapping up discussion of results and determining focus of publication
10:00 - 10:15 Coffee break
10:15 - 12:30 Discussion of modeling intercomparison in real-world catchments Strategy development of model intercomparison of the terrestrial integrated hydrologic and ernergy cycles

12:30 - 13:30 Lunch break
13:30 - Field trip to Wüstebach catchment

Organizers:

  • Stefan Kollet, Forschungszentrum Jülich
  • Reed Maxwell, CSM
  • Mario Putti, U Padova
  • Claudio Paniconi, U Quebec
  • Olaf Kolditz, UFZ
  • Bernd Diekkrüger, U Bonn

Background (pdf)

3D tilted V-catchment

Model geometry

Lateral extensions in x and y:       110 x 100m

Vertical extension in z:                 5m below land surface

 

Lateral resolution, Δx = Δy:          10m

Vertical resolution, Δz:                  0.5m

 

Boundary conditions

Overland flow:                            critical depth

Subsurface lateral & bottom:        no flow

Subsurface top:                          overland flow

 

Initial conditions

Water table 2m below land surface, hydrostatic conditions vertically

 

Hydraulic parameters overland flow

Friction slope in x-direction:         Sf,x = 0.05 (-) over hillslopes; Sf,x = 0.0 (-) in channel

Friction slope in y-direction:         Sf,x = 0.02 everywhere

 

Manning's roughness hillslopes:    nhs = 1.74 x 10-7 (hours/m1/3)

Manning's roughness channel:      nc = 1.74 x 10-6 (hours/m1/3)

 

Hydraulic parameters subsurface

Saturated hydraulic conductivity:  Ksat = 10.0 (m/hour)

van Genuchten rel. permeability:  n = 2.0 (-) and α = 6.0 (m-1)

Res. & sat. vol. water content:     θres = 0.08 (-) and θsat = 0.4 (-)

Porosity:                                    φ = 0.4 (-)

Specific storage:                        Ss = 1.0 x 10-5 (m-1)

 

Simulation period, time stepping and scenarios

Simulation period:                     120 hours

Time step size:                          Δt = variable

1st scenario:                             no rainfall; return flow only based on initial conditions

2nd scenario:                             Rain duration: 20 hours

   Rain rate: qr = 0.1 (m/hour)

   Recession duration: 100 hours

 

 

Super-Slab Case (2D cross-section)

Model geometry

Lateral extension in x:                100m

Vertical extension in z:                5m below land surface

 

Lateral resolution, Δx:                 1m

Vertical resolution, Δz:                 0.05

 

1st slab, lateral extension in x:     8 - 50m

1st slab, lateral extension in z:     5.8 - 6.2m

 

2nd slab, lateral extension in x:     40 - 60m

2nd slab, lateral extension in z:     1.3m below the land surface

 

Boundary conditions

Overland flow:                            critical depth

Subsurface lateral & bottom:        no flow

Subsurface top:                          overland flow

 

Initial conditions

Water table 5m below land surface, hydrostatic conditions vertically

 

Hydraulic parameters overland flow

Friction slope in x-direction:         Sf,x = 0.1

Friction slope in y-direction:         Sf,x = 0.0

 

Manning's roughness:                  nc = 1.0 x 10-6 (hours/m1/3)

 

Hydraulic parameters subsurface

 

Ksat

(m/hour)   

Porosity, φ

(-)

Specific storage, Ss

(m-1)

Domain             10.00.11.0 x 10-5
1st slab0.0250.11.0 x 10-5
2nd slab0.0010.11.0 x 10-5

 

van Genuchten parameters 

 

n     

(-)

α

(m-1)

θres

(-)

θsat

(-)

Domain 2.06.00.020.1
1st slab3.01.00.030.1
2nd slab3.01.00.030.1

 

Simulation period

Simulation period:                  12 hours

Time step size:                      Δt = 0.5 hours

Rain duration:                       2 hours

Rain rate:                             qr = 0.1 (m/hour)

Recession duration:               10 hours

 

 

Borden site

Model geometry

ca. 80x20 m, ditch with 2 m depth, aquifer bottom at 0 m

DEM, 0.5 m resolution: dem0.5m

DEM, 1 m resolution: dem1m

Vertical resolution increasing with depth

 

Boundary conditions

Overland flow:                            critical depth everywhere

Subsurface lateral & bottom:        no flow

Subsurface top:                          overland flow

 

Initial conditions

Water table 20 cm below ditch outlet (z = 2.78 m), hydrostatic conditions

 

Hydraulic parameters overland flow

Manning's roughness:                   n = 0.03 s/m1/3

 

Hydraulic parameters subsurface flow

Saturated hydraulic conductivity:  K = 10-5 m/s

van Genuchten:                          n = 6 and α = 1.9 (1/m)

Res. & sat. vol. water content:     θres = 0.067 (-) and θsat = 0.37 (-)

Porosity:                                    φ = 0.37 (-)

Specific storage:                        Ss = 3.2 x 10-4 (1/m)

 

Simulation period, time stepping and scenarios

Simulation period:                     100 min

Time step size:                          Δt = variable

Rain duration:                           50 min

Rain rate:                                 qr = 5.5556 10-6 m/s

Recession duration:                   50 min


 


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