InVEST Results: Sediment Delivery Ratio
The InVEST Sediment Delivery Ratio (SDR) model quantifies and maps overland sediment generation and delivery to the stream. It works at the spatial resolution of the input digital elevation model (DEM). For each pixel, the model computes the amount of annual soil loss from that pixel, then computes the sediment delivery ratio (SDR), which is the proportion of soil loss actually reaching the stream. Sediment retention services are expressed as avoided erosion and avoided export. If the model has not been calibrated, absolute values may not be accurate and conclusions should be drawn by comparing relative values instead.
To learn more about the Sediment Delivery Ratio model, visit the InVEST User Guide (opens in new browser window).
Results
| ws_id | subws_id | ws_name | usle_tot | sed_export | sed_dep | avoid_exp | avoid_eros |
|---|---|---|---|---|---|---|---|
| 1 | 1 | Gura | 1.39251E+06 | 166922 | 1.22559E+06 | 2.10637E+06 | 1.21176E+07 |
If a plot title includes "resampled," that raster was resampled to a lower resolution for rendering in this report. Full resolution rasters are available in the output workspace.
- avoided_erosion_gura.tif
- The contribution of vegetation to keeping soil from eroding from each pixel.
- avoided_export_gura.tif
- The contribution of vegetation to keeping erosion from entering a stream. This combines local/on-pixel sediment retention with trapping of erosion from upslope of the pixel.
- sed_deposition_gura.tif
- The total amount of sediment deposited on the pixel from upslope sources as a result of trapping.
- sed_export_gura.tif
- The total amount of sediment exported from each pixel that reaches the stream.
- rkls_gura.tif
- Total potential soil loss per pixel in the original land cover from the RKLS equation. Equivalent to the soil loss for bare soil.
- usle_gura.tif
- Total potential soil loss per hectare in the original land cover calculated from the USLE equation.
If a plot title includes "resampled," that raster was resampled to a lower resolution for rendering in this report. Full resolution rasters are available in the output workspace.
- pit_filled_dem_gura.tif
- Map of elevation after any pits are filled
- what_drains_to_stream_gura.tif
- Map of which pixels drain to a stream. A value of 1 means that at least some of the runoff from that pixel drains to a stream in stream.tif. A value of 0 means that it does not drain at all to any stream in stream.tif.
- stream_gura.tif
- Stream network, created using flow direction and flow accumulation derived from the DEM and Threshold Flow Accumulation. Values of 1 represent streams, values of 0 are non-stream pixels. The stream network may look incomplete at this resolution, and therefore it may be necessary to view the full-resolution raster in GIS to assess its accuracy.
"Valid percent" indicates the percent of pixels that are not nodata. Comparing "valid percent" values across rasters may help you identify cases of unexpected nodata.
| Minimum | Maximum | Mean | Valid percent | Count | Nodata value | Units | |
|---|---|---|---|---|---|---|---|
| aligned_dem_gura.tif | 1638 | 3121 | 2132.94 | 41.09 | 1169217 | 65535 | m |
| masked_dem_gura.tif | 1638 | 3121 | 2132.95 | 41.08 | 1169217 | 1.79769E+308 | m |
| aligned_lulc_gura.tif | 1 | 19 | 7.49879 | 41.09 | 1169217 | -999999 | unitless |
| masked_lulc_gura.tif | 1 | 19 | 7.49832 | 41.08 | 1169217 | 1.79769E+308 | unitless |
| aligned_erosivity_gura.tif | 3175.23 | 4349.65 | 4019.86 | 41.09 | 1169217 | -3.40282E+38 | MJ · mm/(h · ha · year) |
| masked_erosivity_gura.tif | 3175.23 | 4349.65 | 4019.9 | 41.08 | 1169217 | 1.79769E+308 | MJ · mm/(h · ha · year) |
| aligned_erodibility_gura.tif | 0.0934156 | 0.145113 | 0.120168 | 41.08 | 1169217 | -3.40282E+38 | t · h · ha / (ha · MJ · mm) |
| masked_erodibility_gura.tif | 0.0934156 | 0.145113 | 0.120168 | 41.08 | 1169217 | 1.79769E+308 | t · h · ha / (ha · MJ · mm) |
| mask_gura.tif | 1 | 1 | 1 | 41.08 | 1169217 | 0 | unitless |
| pit_filled_dem_gura.tif | 1638 | 3121 | 2132.95 | 41.08 | 1169217 | 1.79769E+308 | m |
| slope_gura.tif | 0 | 87.0026 | 19.8932 | 41.08 | 1169217 | -3.40282E+38 | |
| slope_threshold_gura.tif | 0.005 | 0.870026 | 0.199038 | 41.08 | 1169217 | 3.40282E+38 | unitless |
| flow_direction_gura.tif | -2.14748E+09 | 2.01327E+09 | 6.0308E+08 | 41.08 | 1169217 | 0 | |
| flow_accumulation_gura.tif | 1 | 480357 | 1462.46 | 41.08 | 1169217 | -1.2379E+29 | unitless |
| stream_gura.tif | 0 | 1 | 0.0491632 | 41.08 | 1169217 | 255 | |
| ls_gura.tif | 0.0277551 | 28.5214 | 2.53782 | 41.08 | 1169217 | 1.79769E+308 | unitless |
| w_gura.tif | 0 | 1 | 0.160066 | 41.08 | 1169217 | -1 | unitless |
| w_threshold_gura.tif | 0.001 | 1 | 0.160071 | 41.08 | 1169217 | 3.40282E+38 | unitless |
| cp_gura.tif | 0 | 1 | 0.157822 | 41.08 | 1169217 | -1 | unitless |
| rkls_gura.tif | 8.67493 | 8130.28 | 1314.63 | 39.06 | 1169217 | -1 | t/ha |
| usle_gura.tif | 0 | 4793.43 | 135.502 | 39.06 | 1169217 | 3.40282E+38 | t/ha |
| w_accumulation_gura.tif | 0.001 | 76890.8 | 152.988 | 41.08 | 1169217 | -1.2379E+29 | unitless |
| w_bar_gura.tif | 0.001 | 1 | 0.170023 | 41.08 | 1169217 | 1.79769E+308 | unitless |
| s_accumulation_gura.tif | 0.005 | 95609.5 | 317.802 | 41.08 | 1169217 | -1.2379E+29 | unitless |
| s_bar_gura.tif | 0.005 | 0.575946 | 0.193782 | 41.08 | 1169217 | 1.79769E+308 | unitless |
| d_up_gura.tif | 7.5E-05 | 331.223 | 3.43979 | 41.08 | 1169217 | 1.79769E+308 | unitless |
| ws_inverse_gura.tif | 1.84289 | 200000 | 653.774 | 41.08 | 1169217 | 3.40282E+38 | unitless |
| d_dn_gura.tif | 0 | 1.4957E+06 | 15941.3 | 41.08 | 1169217 | -1 | unitless |
| ic_gura.tif | -9.40711 | 0.038735 | -3.62249 | 39.06 | 1169217 | -3.40282E+38 | unitless |
| sdr_factor_gura.tif | 0.00560704 | 1 | 0.142219 | 41.08 | 1169217 | -1 | unitless |
| sed_export_gura.tif | 0 | 771.61 | 16.2427 | 39.06 | 1169217 | 3.40282E+38 | t/ha |
| e_prime_gura.tif | 0 | 4021.82 | 113.396 | 41.08 | 1169217 | -1 | t/(ha · year) |
| f_gura.tif | 0 | 531097 | 2639.23 | 41.08 | 1169217 | -1 | t/(ha · year) |
| sed_deposition_gura.tif | 0 | 176194 | 113.396 | 41.08 | 1169217 | -1 | t/ha |
| avoided_erosion_gura.tif | 0 | 7927.03 | 1179.13 | 39.06 | 1169217 | 3.40282E+38 | t/ha |
| avoided_export_gura.tif | 0 | 176272 | 204.966 | 39.06 | 1169217 | 3.40282E+38 | t/ha |
| what_drains_to_stream_gura.tif | 0 | 1 | 0.999998 | 41.08 | 1169217 | 255 | unitless |
Inputs
| Name | Value |
|---|---|
| workspace_dir | D:\a\invest\invest\autotest_dir\autorun_sdr_0 |
| results_suffix | _gura |
| n_workers | -1 |
| dem_path | D:\a\invest\invest\data\invest-sample-data\SDR\DEM_gura.tif |
| erosivity_path | D:\a\invest\invest\data\invest-sample-data\SDR\erosivity_gura.tif |
| erodibility_path | D:\a\invest\invest\data\invest-sample-data\SDR\erodibility_gura.tif |
| lulc_path | D:\a\invest\invest\data\invest-sample-data\SDR\land_use_gura.tif |
| watersheds_path | D:\a\invest\invest\data\invest-sample-data\SDR\watershed_gura.shp |
| biophysical_table_path | D:\a\invest\invest\data\invest-sample-data\SDR\biophysical_table_Gura.csv |
| threshold_flow_accumulation | 1000.0 |
| k_param | 2.0 |
| sdr_max | 0.8 |
| ic_0_param | 0.5 |
| l_max | 122.0 |
| drainage_path | None |
| flow_dir_algorithm | mfd |
If a plot title includes "resampled," that raster was resampled to a lower resolution for rendering in this report. Full resolution rasters are available in the output workspace.
- DEM_gura.tif
- Map of elevation above sea level.
- erodibility_gura.tif
- Map of soil erodibility, the susceptibility of soil particles to detachment and transport by rainfall and runoff.
- erosivity_gura.tif
- Map of rainfall erosivity, reflecting the intensity and duration of rainfall in the area of interest.
- land_use_gura.tif
- Map of land use/land cover codes. Each land use/land cover type must be assigned a unique integer code. All values in this raster must have corresponding entries in the Biophysical Table.
"Valid percent" indicates the percent of pixels that are not nodata. Comparing "valid percent" values across rasters may help you identify cases of unexpected nodata.
| Minimum | Maximum | Mean | Valid percent | Count | Nodata value | |
|---|---|---|---|---|---|---|
| DEM_gura.tif | 1638 | 3121 | 2132.94 | 41.09 | 1.16922E+06 | 65535 |
| erosivity_gura.tif | 3175.23 | 4349.65 | 4019.86 | 41.09 | 1.16922E+06 | -3.40282E+38 |
| erodibility_gura.tif | 0.0934156 | 0.145113 | 0.120168 | 41.08 | 1.16922E+06 | -3.40282E+38 |
| land_use_gura.tif | 1 | 19 | 7.49879 | 41.09 | 1.16922E+06 | -999999 |
Metadata
- avoided_erosion.tif
- The contribution of vegetation to keeping soil from eroding from each pixel.
- Units: metric_ton / hectare
- avoided_export.tif
- The contribution of vegetation to keeping erosion from entering a stream. This combines local/on-pixel sediment retention with trapping of erosion from upslope of the pixel.
- Units: metric_ton / hectare
- rkls.tif
- Total potential soil loss per pixel in the original land cover from the RKLS equation. Equivalent to the soil loss for bare soil.
- Units: metric_ton / hectare
- sed_deposition.tif
- The total amount of sediment deposited on the pixel from upslope sources as a result of trapping.
- Units: metric_ton / hectare
- sed_export.tif
- The total amount of sediment exported from each pixel that reaches the stream.
- Units: metric_ton / hectare
- stream.tif
- Stream network, created using flow direction and flow accumulation derived from the DEM and Threshold Flow Accumulation. Values of 1 represent streams, values of 0 are non-stream pixels.
- Units: None
- stream_and_drainage.tif
- This raster is the union of that layer with the calculated stream layer. Values of 1 represent streams, values of 0 are non-stream pixels.
- Units: none
- usle.tif
- Total potential soil loss per hectare in the original land cover calculated from the USLE equation.
- Units: metric_ton / hectare
- watershed_results_sdr.shp
- Table containing biophysical values for each watershed
- intermediate_outputs/cp.tif
- CP factor derived by mapping usle_c and usle_p from the biophysical table to the LULC raster.
- Units: none
- intermediate_outputs/d_dn.tif
- Downslope factor of the index of connectivity.
- Units: none
- intermediate_outputs/d_up.tif
- Upslope factor of the index of connectivity.
- Units: none
- intermediate_outputs/e_prime.tif
- Sediment downslope deposition, the amount of sediment from a given pixel that does not reach a stream.
- Units: metric_ton / hectare / year
- intermediate_outputs/f.tif
- Map of sediment flux for sediment that does not reach the stream.
- Units: metric_ton / hectare / year
- intermediate_outputs/flow_accumulation.tif
- Map of flow accumulation
- Units: none
- intermediate_outputs/flow_direction.tif
- MFD flow direction. Note: the pixel values should not be interpreted directly. Each 32-bit number consists of 8 4-bit numbers. Each 4-bit number represents the proportion of flow into one of the eight neighboring pixels.
- Units: None
- intermediate_outputs/ic.tif
- Index of connectivity.
- Units: none
- intermediate_outputs/ls.tif
- LS factor for USLE.
- Units: none
- intermediate_outputs/pit_filled_dem.tif
- Map of elevation after any pits are filled
- Units: meter
- intermediate_outputs/s_accumulation.tif
- Flow accumulation weighted by the thresholded slope. Used in calculating s_bar.
- Units: none
- intermediate_outputs/s_bar.tif
- Mean thresholded slope gradient of the upslope contributing area.
- Units: none
- intermediate_outputs/sdr_factor.tif
- Sediment delivery ratio.
- Units: none
- intermediate_outputs/slope.tif
- Percent slope, calculated from the pit-filled DEM. 100 is equivalent to a 45 degree slope.
- Units: None
- intermediate_outputs/slope_threshold.tif
- Percent slope, thresholded to be no less than 0.005 and no greater than 1. 1 is equivalent to a 45 degree slope.
- Units: none
- intermediate_outputs/w_accumulation.tif
- Flow accumulation weighted by the thresholded cover-management factor. Used in calculating w_bar.
- Units: none
- intermediate_outputs/w_bar.tif
- Mean thresholded cover-management factor for upslope contributing area.
- Units: none
- intermediate_outputs/w.tif
- Cover-management factor derived by mapping usle_c from the biophysical table to the LULC raster.
- Units: none
- intermediate_outputs/w_threshold.tif
- Cover-management factor thresholded to be no less than 0.001.
- Units: none
- intermediate_outputs/what_drains_to_stream.tif
- Map of which pixels drain to a stream. A value of 1 means that at least some of the runoff from that pixel drains to a stream in stream.tif. A value of 0 means that it does not drain at all to any stream in stream.tif.
- Units: none
- intermediate_outputs/ws_inverse.tif
- Inverse of the thresholded cover-management factor times the thresholded slope.
- Units: none
- intermediate_outputs/aligned_dem.tif
- Copy of the input DEM, clipped to the extent of the other raster inputs.
- Units: meter
- intermediate_outputs/aligned_drainage.tif
- Copy of the input drainage map, clipped to the extent of the other raster inputs and aligned to the DEM.
- Units: none
- intermediate_outputs/aligned_erodibility.tif
- Copy of the input erodibility map, clipped to the extent of the other raster inputs and aligned to the DEM.
- Units: hour * metric_ton / megajoule / millimeter
- intermediate_outputs/aligned_erosivity.tif
- Copy of the input erosivity map, clipped to the extent of the other raster inputs and aligned to the DEM.
- Units: megajoule * millimeter / hectare / hour / year
- intermediate_outputs/aligned_lulc.tif
- Copy of the input Land Use Land Cover map, clipped to the extent of the other raster inputs and aligned to the DEM.
- Units: none
- intermediate_outputs/mask.tif
- A raster aligned to the DEM and clipped to the extent of the other raster inputs. Pixel values indicate where a nodata value exists in the stack of aligned rasters (pixel value of 0), or if all values in the stack of rasters at this pixel location are valid.
- Units: none
- intermediate_outputs/masked_dem.tif
- A copy of the aligned DEM, masked using the mask raster.
- Units: meter
- intermediate_outputs/masked_drainage.tif
- A copy of the aligned drainage map, masked using the mask raster.
- Units: none
- intermediate_outputs/masked_erodibility.tif
- A copy of the aligned erodibility map, masked using the mask raster.
- Units: hour * metric_ton / megajoule / millimeter
- intermediate_outputs/masked_erosivity.tif
- A copy of the aligned erosivity map, masked using the mask raster.
- Units: megajoule * millimeter / hectare / hour / year
- intermediate_outputs/masked_lulc.tif
- A copy of the aligned Land Use Land Cover map, masked using the mask raster.
- Units: none
- taskgraph_cache/taskgraph.db
- Cache that stores data between model runs. This directory contains no human-readable data and you may ignore it.