Yield Erosion Sediment (YES): A PyQGIS Plug-In for the Sediments Production Calculation Based on the Erosion Potential Method

Dominici, Rocco, Larosa, Salvatore, Viscomi, Antonio , Mao, Luca, De Rosa, Rosanna and Cianfalone, Giuseppe (2020) Yield Erosion Sediment (YES): A PyQGIS Plug-In for the Sediments Production Calculation Based on the Erosion Potential Method. Geosciences, 10 (8). p. 324. ISSN 2076-3263

Full content URL: https://doi.org/10.3390/geosciences10080324

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Yield Erosion Sediment (YES): A PyQGIS Plug-In for the Sediments Production Calculation Based on the Erosion Potential Method
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Abstract

The Erosion Potential Method is a model for qualifying the erosion severity and estimating
the total annual sediment yield of a catchment. The method includes a diverse set of equations,
which are influenced by different factors such as geology, morphology, climate and soil use. This
study describes a PyQGIS YES plug-in, which allows a semiautomatized use of the Erosion Potential
Method in Geographic Information System (GIS) environment. In detail, we developed a plug-in
using Python programming language that is made up of a series of operations allowing one to
estimate sediment production through a wizard procedure. The first stage consists of data
preprocessing and involves: (i) loading of the layers (e.g., geological map); (ii) spatial selection of
the catchment area; (iii) elaboration of loaded layers (e.g., clipping). During the second stage, the
user assigns a relative coefficient to each factor either by selecting a preloaded value from
bibliographic sources or by inserting a value inferred from field observations and data. The third
stage includes the addition of rainfall and temperature values loaded as: average values, point
shapefiles (the plug-in calculates the average monthly values) or tables (the plug-in creates the linear
regression depending on altitude). During the final stage, the plug-in executes the equation of EPM
Model obtaining the sediment yield value at basin scale. Additionally, the user can use the “squared
cell” method choosing the appropriate option in the setting dialogue of the plug-in. This method
divides the catchment area in a regularly-spaced grid which allows one to carry out the distribution
map of the sediment production during the final stage.

Keywords:erosion potential method, python, QGIS, YES plug-in
Subjects:F Physical Sciences > F820 Geomorphology
Divisions:College of Science > School of Geography
ID Code:42281
Deposited On:10 Sep 2020 10:13

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