Hydrological response to land use land cover in Northwestern Ghana Using Geospatial and SWAT Model Techniques

SWAT Model Input Data for the Kulpawn River Basin, Northwestern Ghana.

This dataset provides the daily climate dataset and observed streamflow used to set up, calibrate, and validate a Soil and Water Assessment Tool (SWAT2012, QSWAT interface) model of the Kulpawn River Basin in northwestern Ghana (approximately 10.1–10.8° N, 1.9–2.5° W). It supports hydrological modelling, water-resources assessment, and reproducibility of the associated study.

The climate dataset comprises five variables, each supplied on a regular 3 × 3 grid of nine points across the basin: precipitation (pcp1–9, mm), maximum and minimum temperature (tmp11–99, °C), relative humidity (rh1–9), solar radiation (sr1–9, MJ m⁻² day⁻¹), and wind speed (wn1–9, m s⁻¹). These are “plain-text files” in SWAT format: the first line is the record start date (19920101, for example, 1 January 1992), and each following line is one calendar day in continuous order, with -99 marking missing values. Temperature files hold two comma-separated columns per day (maximum, then minimum). Each variable has a matching station table (“Stations.txt”) listing point ID, name, latitude, longitude, and elevation, which links each grid point to its data file. The 1992–1994 record serves as the model warm-up.

The observed streamflow, recorded at the Yagaba gauging station at the basin outlet, is split by modelling phase: Calibration-1995-2004.xlsx and Validation-2005-2021.xlsx.