TITLE:
Effects of Finer Scale Soil Survey and Land-Use Classification on SWAT Hydrological Modelling Accuracy in Data-Poor Study Areas
AUTHORS:
Verenice Escamilla-Rivera, Sergio Cortina-Villar, Raúl A. Vaca, Duncan Golicher, José Arellano-Monterrosas, Jordi Honey-Rosés
KEYWORDS:
Map Scale, SWAT Model, Soil Survey, Land Use/Land Cover, Mexico
JOURNAL NAME:
Journal of Water Resource and Protection,
Vol.14 No.2,
February
18,
2022
ABSTRACT: The limited availability of high-quality spatial data often limits the development of hydrological modelling in developing countries. Hydrological models with data at different scales may generate large uncertainties in modelling outputs. This study analysed the accuracy of four SWAT built models that combine soil and land use/land cover (LULC) data at the scale of 1:250,000 and 1:100,000 in a basin of Mexico. SWAT model allowed determining that large-scale maps produced better results than data from small-scale. Sensitivity analysis with different soil data was less than LULC data. However, the small-scale can be used for exploratory purposes when testing SWAT performance.