This article explores the relationship between liquidity index (IL), undrained shear strength (cu), and water content in river sediments. The authors conducted fall-cone tests to investigate cu at high-water contents and compared their findings with previous studies on peat soils. They discussed the selection of fall-cone factors and test types, as well as the variation of cu with changing water content. The article presents regression equations and compares them with previously published formulations. It concludes that caution should be exercised when using these equations, particularly near the plastic limit. The study also discusses the use of power-law functions to assess cu in different soil types at varying water contents. The results suggest that certain power-law functions are more suitable for higher water contents, while others are better for lower water contents. The study acknowledges the limitations and potential discrepancies in the data analysis process. Overall, the findings provide insights into the variation of cu with water content in different soil types. The article also discusses different equations and functions used to study the variation of cu with changes in water content. It compares the effectiveness of different variables, such as IL and water content ratio, in predicting cu. The article presents graphs and plots to illustrate the data and the fitting of the equations. It concludes that IL is statistically superior to the water content ratio in predicting cu. The document analyzes data on clay sediments from three rivers and compares different equations to predict cu based on IL and water content. The authors find that one equation provides a more symmetrical distribution [Extracted from the article]