VIC Lake/Wetland Parameter File
Lake/Wetland parameters needed for the different VIC model set-ups are listed below.
NOTE: all depths are measured from the water/air surface to the lake bottom, at the lake's deepest point (approximately the geographic center of the lake). E.g., min_depth refers to the minimum allowable depth at the center of the lake.
Lake/Wetland Parameter File Format
|
Variable Name |
Units |
Description |
|---|---|---|
|
N/A |
Grid cell number |
|
|
lake_idx |
N/A |
Index of the veg tile containing the lake/wetland, with respect to the list of veg tiles given in the veg param file for the current grid cell. Numbering starts at 0 for the grid cell's first veg tile, up to (Nveg-1) for the grid cell's final veg tile. |
|
numnod |
N/A |
Number of lake layers (or "nodes") |
|
min_depth |
m |
Minimum allowable lake depth |
|
wfrac |
N/A |
Width of lake outlet, as a fraction of the lake perimeter |
|
depth_in |
m |
Initial lake depth |
|
rpercent |
fraction |
Fraction of grid cell runoff that enters lake (instead of going directly to channel network) |
If LAKE_PROFILE is FALSE in the global parameter file, then the lake depth-area profile will be computed as a parabola, and the 2nd line of parameters for the grid cell are as follows:
|
Variable Name |
Units | Description |
|---|---|---|
|
basin_depth |
m |
Maximum allowable depth of lake |
|
basin_area |
fraction |
Fraction of the grid cell covered by lake when its depth is at its maximum value |
If LAKE_PROFILE is TRUE in the global parameter file, then the 2nd line of parameters for the grid cell consists of numnod (depth, area) pairs describing the profile of the lake basin, starting from the maximum depth and area and descending to the minimum depth and area:
| Variable Name | Units | Description |
|---|---|---|
|
basin_depth |
m |
Depth of lake |
|
basin_area |
fraction |
Fraction of the grid cell covered by lake when its depth is depth |
Example Lake/Wetland Parameter File:
### In this example, there are 10 lake nodes, the lake/wetland occurs in the ### 1st veg tile, and LAKE_PROFILE is TRUE. 7 0 10 1 0.005 10 0.5 15 0.12 13.5 0.11 12 0.10 10.5 0.09 9 0.08 7.5 0.06 6 0.04 4.5 0.02 3 0.01 1.5 0.0075
VIC Administrator Last modified: Mon Aug 31 13:56:45 PDT 2009