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 |
Fraction of water going to |
||
2 |
Fraction of water going to |
||
3 |
Fraction of water going to |
||
4 |
Fraction of water going to |
||
5 |
Fraction of water going to |
||
6 |
Fraction of water going to |
||
7 |
Fraction of water going to |
||
8 |
Fraction of water going to |
||
9 |
Fraction of water going to |
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