Model Details

Summary

The InVEST Urban Flood Risk Mitigation Model calculates the runoff reduction, i.e. the amount of runoff retained per pixel compared to the storm volume. For each watershed, it also calculates the potential economic damage by overlaying information on flood extent potential and built infrastructure.

from InVEST Documentation

Data needs

Before running the InVEST Urban Flood Risk Mitigation Model, check the key model input here.

How to run the model?

Model output

Layout

InVEST Urban Flood Risk Mitigation Model outputs have the following layout:

.
│  flood_risk_service.dbf
│  flood_risk_service.prj
│  flood_risk_service.shp
│  flood_risk_service.shx
│  InVEST-natcap.invest.urban_flood_risk_mitigation-log-2023-01-03--19_16_18.txt
│  precipitation=100.txt
│  Q_mm.tif
│  Runoff_retention.tif
│  Runoff_retention_m3.tif
│
├─intermediate_files
│      Q_m3.tif
│      reprojected_aoi.gpkg
│      structures_reprojected.gpkg
│
└─temp_working_dir_not_for_humans
        aligned_lulc.tif
        aligned_lulc.tif.aux.xml
        aligned_soils_hydrological_group.tif
        aligned_soils_hydrological_group.tif.aux.xml
        cn_raster.tif
        s_max.tif
        taskgraph_data.db

Structure rundown

Folder	File name(s)	Explanation
./	flood_risk_service.*(dbf,prj,shp,shx)	Shapefile with results in the attribute table, e.g., average of runoff retention values per watershed sum of runoff retention volumes per watershed flood volume per watershed potential damage (Unit: USD) to built infrastructure per watershed an indicator of the runoff retention service for the watershed
./	Q_mm.tif	Runoff map (Unit: mm)
./	Runoff_retention.tif	Runoff retention ratio map (no unit, relative to precipitation volume)
./	Runoff_retention_m3.tif	Runoff retention volume map (Unit: m3)
./	*.txt	The txt file lists the parameter values and output messages for that run and will be named according to the service, the date and time

note

Only key outputs are listed in the above table.

As reflected by its name, files in the /intermediate folder are intermediate output.

If you want to learn more on these output, you can refer to this link.

Results visualization

Distribution of runoff (Q) (Figure 1)
Distribution of runoff retention ratio (Figure 2)
Distribution of runoff retention (Figure 3)
Distribution of runoff retention service (Figure 4)
Same as Figure 1, but with land use change
Same as Figure 2, but with land use change
Same as Figure 3, but with land use change
Same as Figure 4, but with land use change