Assessing the Validity of the Bradshaw Model through Gradient and Cross-Sectional Area Analysis of the Kui Buri River, Thailand

This investigation evaluates the validity of the Bradshaw model by analyzing the gradient and cross-sectional area of the Kui Buri River in Thailand. The study tests two primary hypotheses: that cross-sectional area increases and river gradient decreases downstream.

Using stratified sampling across ten sites, primary data was collected via clinometers and tape measures. The analysis employs rigorous statistical testing, including the Mann-Whitney U-test and Spearman's Rank correlation, to validate observed trends.

Findings confirm a general alignment with the Bradshaw model, though anomalies are attributed to anthropogenic interference and limestone geology. The paper is particularly valuable for its comparative evaluation of the Schumm model as a more accurate alternative for sedimentary rock basins.