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Questions tagged [erosion]

Erosion is the process by which soil and rock are removed from the Earth's surface by exogenetic processes such as wind or water flow, and then transported and deposited in other locations.

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LS Factor in SAGA (slope units)

In which units do I have to calculate Slope to use as an input for the LS Factor tool in SAGA (degrees, %, radians)? I couldn't find anything in the documentation.
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85 views

Classification erosion - semi-automatic classification plugin

I get an error when working Classification Erosion tool in Semi-automatic Classification Plugin (SCP). I use QGIS v3.2.2 and SCP v6.2.4. The tool is not changing the pixels of the raster layer and ...
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438 views

Calculating slope/gradient from longitude and latitude

I've recently got some field erosion data. The only geographic data I have is the (lon, lat) (in degrees). I need to plot the erosion against the slope, however, I do not have the slope yet. Is it ...
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3answers
392 views

Minimum wall-thickness of a non convex polygon with holes

What is the most efficient way to find the minimal wall-thickness (value and location) of a complex, non convex polygon area including holes? See example of a polygon in blue, with the minimum wall-...
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1answer
262 views

How to define pour points from a stream network at a barrier for watershed calculations?

I'm looking for a way to check if cells from one raster file have contact or get close to cells from a second raster file. For example the blue raster is a barrier and the coloured is the flow ...
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2answers
2k views

Calculating slope length using LS-tool

Does anyone know how to get LS-tool mentioned in Zhang et al 2013. https://www.researchgate.net/publication/256938578_Extension_of_a_GIS_procedure_for_calculating_the_RUSLE_equation_LS_factor I tried ...
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0answers
158 views

Extract representative slope profiles from hillslope polygons

With the help of the Whitebox Geospatial Analysis Tools I was able to easily extract hill slopes from a river network in combination with a flow direction map. Now I would like to extract ...
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1answer
314 views

How to produce a hazard map using slope and geology information

for my project I need to display a landscape's susceptibility to erosion. I created a slope-map out of my DEM and added the bedrock geology as a polygon-feature shapefile. Now I want to tell ArcGIS ...
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641 views

How to compare outputs of erosion from ArcSWAT and RUSLE from ArcGIS?

I calculated water erosion in ArcSWAT and I also calculated erosion by RUSLE http://35.8.121.139/rusle/ equation in ArcGIS. Now I need to compare these two (from ArcSWAT I used SYLD- assumed ...
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3answers
1k views

Calculating changes in slope angle between cells/areas using ArcGIS Desktop?

I am doing an estimation of erosion with ArcGIS. I use the UniversalSoilLossEquation (USLE) for this. Now, i want to calculate the L-factor of this equation. I need the FlowLength for this. My ...