Attribute Tables
Land Cover (Land Use) Layer
Note
The order may vary slightly depending on which layers are downloaded within the area of interest
| OBJECT_ID | FID | FID_ZBG | Shape_Length | Shape_Area | source | LandUse_code | ... |
|---|---|---|---|---|---|---|---|
| 474174 | 11390 | 9118867599130624 | 25.91594895 | 41.976849999744445 | ZABAGED_POLOHOPIS:Budova_jednotlivá_nebo_blok_budov__plocha_ | 44100 | ... |
| NULL | NULL | NULL | NULL | NULL | LPIS_layer | 20000 | ... |
| NULL | 9914363 | 474712196 | 738.75743744 | NULL | ZABAGED_POLOHOPIS:Silnice__dálnice | 44100 | ... |
- OBJECT_ID – provider identifier
- FID – provider identifier
- FID_ZBG – unique object identifier in ZABAGED®
- Shape_Length – perimeter of the original feature provided by the WFS service
- Shape_Area – Area of the feature provided by the WFS service. After retrieving the layer, this does not reflect the real value and is recalculated during the direct runoff volume computation process.
- source – Name of the layer provided by the WFS service (ZABAGED); for LPIS DPB data, only LPIS_layer is shown
- LandUse_code – Code defining the Land Cover (in some locations Land Use) type. Assigned based on configuration files (1, 2). It is also used in the CN values table for assigning the CN values.
- ... – Additional attribute fields are inherited from downloaded ZABAGED and LPIS layers
Hydrologic Soil Groups layer (Soil Layer HSG)
| ID | HSG | fid | layer | path |
|---|---|---|---|---|
| 1 | 0 | NULL | output | MultiPolygon?crs=EPSG:5514field=ID:integer(0,0)... |
| NULL | 3 | 1 | output | MultiPolygon?crs=EPSG:5514field=ID:integer(0,0)... |
| NULL | 2 | 2 | output | MultiPolygon?crs=EPSG:5514field=ID:integer(0,0)... |
- ID - value 1 is assigned to NoData areas in the source HSG raster layer provided by the WPS service
- HSG - numeric code for Hydrologic Soil Group (0 = areas without HSG, 1=A, 2=B, 3=C, 4=D).
- fid - Identifier assigned by the WPS service.
- layer - the string output assigned when polygon is succesfully created from the original raster layer. Features with different value in this field may have invalid geometry.
- path - layer metadata
Combined layer with Land Cover and HSG data (Intersected LandUse and HSG)
Note
This layer contains attribute fields inherited from both parent layers. Key attributes again are HSG and LandUse_code. Only the below listed fields differ. During the next step (CN assignment), all extra fields are deleted.
| fid | fid_2 | layer | path | layer_2 | path_2 |
|---|---|---|---|---|---|
| 32406 | NULL | clipped | MultiPolygon?crs=EPSG:5514field=ID:integer(0,0)... | output | MultiPolygon?crs=EPSG:5514field=ID:integer(0,0)... |
| NULL | 1 | clipped | MultiPolygon?crs=EPSG:5514field=ID:integer(0,0)... | output | MultiPolygon?crs=EPSG:5514field=ID:integer(0,0)... |
- fid – provider identifier from ZABAGED/LPIS
- fid_2 – feature identifier assigned by the WPS service providing the Soil Hydrologic Groups layer
- layer – the string clipped assigned once the input layer is successfuly clipped and appended to the layers with higher priority
- path – metadata of Land Cover (Land Use) layer
- layer_2 – the string output assigned when polygon is succesfully created from the original HSG raster layer. Features with different value in this field may have invalid geometry.
- path_2 – metadata of Hydrologic Soil Groups layer
Curve Number (CN) Layer
| FID | Shape_Length | Shape_Area | source | LandUse_code | OBJECTID | HSG | CN2 | CN3 |
|---|---|---|---|---|---|---|---|---|
| 32406 | 2701.37014425 | 341856.95321526 | ZABAGED_POLOHOPIS:Vodní_plocha | 77200 | NULL | 0 | 99 | 99.56274595540009 |
| NULL | 110.92570167 | 521.32182349 | ZABAGED_POLOHOPIS:Lesní_půda_se_stromy_kategorizovaná__plocha_ | 33300 | 2040918 | 2 | 50 | 69.6969696969697 |
- FID – provider identifier from ZABAGED/LPIS
- Shape_Length – perimeter of the original feature provided by the WFS service
- Shape_Area – area of the feature provided by the WFS service. After retrieving the layer, this does not reflect the real value and is recalculated during the direct runoff volume computation process.
- source – Name of the layer provided by the WFS service (ZABAGED); for LPIS DPB data, only LPIS_layer is shown
- LandUse_code – Code defining the Land Cover (in some locations Land Use) type. Assigned based on configuration files (1, 2). It is also used in the CN values table for assigning the CN values.
- HSG – numeric code for Hydrologic Soil Group (0 = areas without HSG, 1=A, 2=B, 3=C, 4=D).
- CN2 – CN value assigned from the table. It represents average antecedent moisture conditions
-
CN3 – CN value calculated from CN2 using the formula below. It represents wet antecedent moisture conditions:
CN3 = CN2 / (0.4036 + 0.005964 x CN2)
Runoff Volume Layer
Note
All types of direct runoff depth and volume layers inherit all the attribute fields from the parent CN layer.
Design 6-hour rainfall depths from rain.fsv.cvut.cz
Note
The example shows results only for 2- and 5-year return periods (N2, N5).
For more/different return periods, the attribute field names remain the same; only the part refering to the return period (N2, N5, N10, ...) will differ.
| V_N2_m3 | CN2_N2_runoff_height_mm | CN2_N2_runoff_volume_m3 | CN3_N2_runoff_height_mm | CN3_N2_runoff_volume_m3 | V_N10_m3 | CN2_N10_runoff_height_mm | CN2_N10_runoff_volume_m3 | CN3_N10_runoff_height_mm | CN3_N10_runoff_volume_m3 |
|---|---|---|---|---|---|---|---|---|---|
| 2537.829236336099 | 24.743203117150543 | 2411.544190664504 | 26.305069501921043 | 2563.768209072887 | 4279.45426857832 | 42.4599316851946 | 4138.267834873376 | 44.08827672231118 | 4296.971055150222 |
- V_N2_m3 – direct runoff volume [m3] from particular feature (polygon) for a 2-year return period, weighted by the occurence probabilities of hyetograph types and the abnormaly wet initial conditions)
- CN2_N2_runoff_height_mm – direct runoff depth [mm] from the 6-hour design rainfall within the area of interest derived by the WPS service for the 2-year return period with use of CN2
- CN2_N2_runoff_volume_m3 – direct runoff volume [m3] from particular feature (polygon) calculated from the feature’s area and the runoff depth CN2_N2_runoff_height_mm (in the average moisture conditions represented with CN2)
- CN3_N2_runoff_height_mm – direct runoff depth [mm] from the 6-hour design rainfall within the area of interest derived by the WPS service for the 2-year return period with use of CN3
- CN3_N2_runoff_volume_m3 – direct runoff volume [m3] from particular feature (polygon) calculated from the feature’s area and the runoff depth CN3_N2_runoff_height_mm (in the wet initial conditions represented with CN3)
- V_N10_m3 – direct runoff volume [m3] from particular feature (polygon) for a 10-year return period, weighted by the occurence probabilities of hyetograph types and the abnormaly wet initial conditions)
- CN2_N10_runoff_height_mm – direct runoff depth [mm] from the 6-hour design rainfall within the area of interest derived by the WPS service for the 10-year return period with use of CN2
- CN2_N10_runoff_volume_m3 – direct runoff volume [m3] from particular feature (polygon) calculated from the feature’s area and the runoff depth CN2_N10_runoff_height_mm (in the average moisture conditions represented with CN2)
- CN3_N10_runoff_height_mm – direct runoff depth [mm] from the 6-hour design rainfall within the area of interest derived by the WPS service for the 10-year return period with use of CN3
- CN3_N10_runoff_volume_m3 – direct runoff volume [m3] from particular feature (polygon) calculated from the feature’s area and the runoff depth CN3_N10_runoff_height_mm (in the wet initial conditions represented with CN3)
Calculation using a single user-defined runoff depth
| CN2_runoff_height_mm | CN2_runoff_volume_m3 | CN3_runoff_height_mm | CN3_runoff_volume_m3 |
|---|---|---|---|
| 13.45340226457616 | 42.854151425353045 | 37.43211159302552 | 119.23536863251337 |
- CN2_runoff_height_mm – direct runoff depth [mm] calculated from the user-defined rainfall depth with use of CN2
- CN2_runoff_volume_m3 – direct runoff volume [m3] from particular feature (polygon) calculated from the feature’s area and the runoff depth CN2_runoff_height_mm (for average moisture conditions represented with CN2)
- CN3_runoff_height_mm – direct runoff depth [mm] calculated from the user-defined rainfall depth with use of CN3
- CN3_runoff_volume_m3 – direct runoff volume [m3] from particular feature (polygon) calculated from the feature’s area and the runoff depth CN3_runoff_height_mm (for wet initial conditions represented with CN3)
Calculation using multiple user-defined runoff depths
Note
The example shows an output table for two input rainfall depths. With more inputs, only the name parts refering to the position of a rainfall depth in the sequence will differ:
CN2_1_runoff_height_mm, CN2_2_runoff_height_mm, CN2_3_runoff_height_mm, …
Resulting attribute table contains the same fields as in the previous case, but for multiple rainfall depths as input.
| CN2_1_runoff_height_mm | CN2_1_runoff_volume_m3 | CN3_1_runoff_height_mm | CN3_1_runoff_volume_m3 | CN2_2_runoff_height_mm | CN2_2_runoff_volume_m3 | CN3_2_runoff_height_mm | CN3_2_runoff_volume_m3 |
|---|---|---|---|---|---|---|---|
| 13.45340226457616 | 42.854151425353045 | 37.43211159302552 | 119.23536863251337 | 77.00143626535197 | 7504.782845589686 | 78.67677931229387 | 7668.066627931615 |