Modelling soil erosion and runoff for a super typhoon event using PCRaster
Issue Date
11-2020
Abstract
A physical model for soil erosion and runoff was created for Alimit River Sub-watershed, using PCRaster Software. Manning's equation was used to model surface runoff velocity and Rose’ and Freebairn’s Equation was used to compute for sediment concentration. Event-based rainfall, saturated hydraulic conductivity, land use map, and digital elevation model were used as input for the model. Close correspondence was observed between the measured and predicted values for both streamflow and mass of eroded sediments. It was observed that vegetation played a significant role in reducing eroded sediments and choosing the correct Manning's Roughness Coefficient for various land use/ land cover is of utmost importance. Furthermore, in the absence of soil data, land use/ land cover or NDVI (Normalized Difference Vegetation Index) can be used as basis for the hydraulic conductivity of the soil.
Source or Periodical Title
Journal of Maps
Volume
16
Issue
2
Page
879-889
Document Type
Article
Physical Description
illustrations, diagram, graphs, tables
Language
English
Subject
GIS, Ifugao, Koppu, Lando, PCRaster, Super Typhoon
Recommended Citation
Bato, V.A. (2020). Modelling soil erosion and runoff for a super typhoon event using PCRaster. Journal of Maps, 16 (2), 879-889. 10.1080/17445647.2020.1841037.
Identifier
DOI:10.1080/17445647.2020.1841037
Digital Copy
yes
En – AGROVOC descriptors
GIS; IFUGAO; KOPPU; LANDO; PCRASTER; SUPER TYPHOON