Stephane being an expert in sediments and fluvial Geo morphology, he will be working with bed load sediments in this project. Our collaboration aims to quantify the bed load in the Louroux catchment. This endeavor marks the first time that we can compare the export of sediment by suspension, which has been extensively studied over the past decade, with the bed load transfer. The comparison of bed load with suspended sediments data could pave way to interesting findings. By integrating bed load transfer data, we hope to achieve a comprehensive understanding of sediment transport dynamics in this small agricultural basin. The significance of quantifying bedload solid flux lies in its critical role in estimating microplastic flux within this sedimentary compartment. Microplastics due to its pervasive nature it is found to heteroaggregate with sediments. Thus, understanding the total sediment transport, including both suspension and bedload, is essential for accurate microplastic quantification. This research will shed light on the distribution and movement of microplastics within terrestrial and riverine environment. Our approach involves the innovative use of hydrophones to measure bedload fluxes in the Louroux catchment, a technique that presents unique challenges in small basins with low bedload fluxes. This involves analyzing microplastic concentrations in both suspended and bedload sediments to determine their transport dynamics.The research outcomes will provide a novel understanding of sediment transport in small agricultural catchments and the critical role of bedload in microplastic flux estimation. The successful development and application of hydrophones in this context will pave the way for similar studies in other small basins, contributing to broader efforts to manage and mitigate microplastic pollution.