The escalating human population and urbanization necessitate construction on challenging soils, underscoring the imperative to enhance their characteristics. With environmental concerns associated with conventional soil stabilization agents like cement, there is a growing demand for eco-friendly alternatives. This study explores the viability of biopolymer soil stabilizers, specifically xanthan gum, and lignin, to improve soil geotechnical properties. Laboratory and flume experiments were conducted to assess their efficacy against soil erosion, slope failure, and overall soil properties enhancement. [...]