Note
Please report issues with the manual on the GitHub page.
4.2.13. SUEWS_WithinGridWaterDist.txt¶
SUEWS_WithinGridWaterDist.txt specifies the movement of water between surfaces within a grid/area. It allows impervious connectivity to be taken into account.
Each row corresponds to a surface type (linked by the Code in column 1 to the SUEWS_SiteSelect.txt columns: WithinGridPavedCode, WithinGridBldgsCode, …, WithinGridWaterCode). Each column contains the fraction of water flowing from the surface type to each of the other surface types or to runoff or the sub-surface soil store.
Note
- The sum of each row (excluding the Code) must equal 1.
- Water CANNOT flow from one surface to that same surface, so the diagonal elements should be zero.
- The row corresponding to the water surface should be zero, as there is currently no flow permitted from the water surface to other surfaces by the model.
- Currently water CANNOT go to both runoff and soil store (i.e. it
must go to one or the other –
runofffor impervious surfaces;soilstorefor pervious surfaces).
In the table below, for example,
- All flow from paved surfaces goes to runoff;
- 90% of flow from buildings goes to runoff, with small amounts going to other surfaces (mostly paved surfaces as buildings are often surrounded by paved areas);
- All flow from vegetated and bare soil areas goes into the sub-surface soil store;
- The row corresponding to water contains zeros (as it is currently not used).
| No. | Column Name | Use | Description |
|---|---|---|---|
| 1 | ToPaved |
MU |
Fraction of water going to Paved |
| 2 | ToBldgs |
MU |
Fraction of water going to Bldgs |
| 3 | ToEveTr |
MU |
Fraction of water going to EveTr |
| 4 | ToDecTr |
MU |
Fraction of water going to DecTr |
| 5 | ToGrass |
MU |
Fraction of water going to Grass |
| 6 | ToBSoil |
MU |
Fraction of water going to BSoil |
| 7 | ToWater |
MU |
Fraction of water going to Water |
| 8 | ToRunoff |
MU |
Fraction of water going to Runoff |
| 9 | ToSoilStore |
MU |
Fraction of water going to SoilStore |
An example SUEWS_WithinGridWaterDist.txt can be found below:
1 2 3 4 5 6 7 8 9 10
Code ToPaved ToBldgs ToEveTr ToDecTr ToGrass ToBSoil ToWater ToRunoff ToSoilStore !
10 0 0 0 0 0 0 0 1 0 ! Paved Example
20 0.06 0 0.01 0.01 0.01 0.01 0 0.9 0 ! Buildings Example
30 0 0 0 0 0 0 0 0 1 ! Evergreen Example
40 0 0 0 0 0 0 0 0 1 ! Decid Example
50 0 0 0 0 0 0 0 0 1 ! Grass Example
60 0 0 0 0 0 0 0 0 1 ! UnmanBare Example
70 0 0 0 0 0 0 0 0 0 ! Water Example
21 0.03 0 0.01 0.01 0.01 0.01 0 0.93 0 ! Buildings Example
551 0 0 0 0 0.02 0 0 0.98 0 ! Paved Swindon
552 0.08 0 0 0 0.02 0 0 0.9 0 ! Bldgs Swindon
553 0 0 0 0 0 0 0 0 1 ! EveTr Swindon
554 0 0 0 0 0 0 0 0 1 ! DecTr Swindon
555 0 0 0 0 0 0 0 0 1 ! Grass Swindon
556 0 0 0 0 0 0 0 0 1 ! Bsoil Swindon
557 0 0 0 0 0 0 0 0 0 ! Water Swindon (not present)
661 0 0 0 0 0.02 0 0 0.98 0 ! Paved London
662 0.1 0 0 0 0 0 0 0.9 0 ! Bldgs London
663 0.1 0 0 0 0 0 0 0 0.9 ! EveTr London (not present)
664 0.1 0 0 0 0 0 0 0 0.9 ! DecTr London
665 0 0 0 0 0 0 0 0 1 ! Grass London
666 0 0 0 0 0 0 0 0 1 ! Bsoil London (not present)
667 0 0 0 0 0 0 0 0 0 ! Water London
-9
-9