Sedimentation Analysis (Shear Stress)

This tutorial will use SEAT to evaluate the impact of CEC devices on sediment mobility considering a single median grain size receptor.

Input

At this point the input files and style files should have been prepared as detailed in Prepare Tutorial Files.

To run this demonstration, use the Load GUI Inputs button located at the bottom left of the SEAT GUI, navigate to DEMO/tanana_river/shear_with_receptor.ini, and click OK to load the inputs. If you need detailed instructions on how to load inputs, please refer to the Save & Load Configuration section in the SEAT QGIS Plugin documention.

In brief, the model data consists of individual .nc files for each flow return period. The period within the .nc filename determines the probability of occurrence. There is a set of results for no device and a set of results for 9 devices in the river.

Note

Your paths will differ than the ones shown in the example below. If you get an error double check the paths making sure the files exist at the specified location.

Output

The above example case evaluates the impact on sediment mobility considering a single median grain size receptor in a CSV file. The probability-weighted shear stress with devices is compared to the scenario without devices. The resulting stressor (change in shear stress), stressor with receptor (change in sediment mobility), and the reclassified stressor from the analysis are illustrated below.

Some example output layers are shwown in the Figure below. To add the map layer see the Quick Map Services section.

Layers Legend	Sediment Mobitility Classified
Sediment Mobitility Difference	Shear Stress Difference

Output Files

Additional output files can be found in the specifed Output folder.

Output
└───Shear_stress_with_receptor
    └───Shear Stress Module
           sediment_grain_size.tif
           sediment_mobility_classified.csv
           sediment_mobility_classified.tif
           sediment_mobility_classified_at_sediment_grain_size.csv
           sediment_mobility_difference.csv
           sediment_mobility_difference.tif
           sediment_mobility_difference_at_sediment_grain_size.csv
           sediment_mobility_without_devices.tif
           sediment_mobility_with_devices.tif
           shear_stress_difference.csv
           shear_stress_difference.tif
           shear_stress_difference_at_sediment_grain_size.csv
           shear_stress_risk_metric.csv
           shear_stress_risk_metric.tif
           shear_stress_risk_metric_at_sediment_grain_size.csv
           shear_stress_without_devices.tif
           shear_stress_with_devices.tif