We present new tools in the landscape evolution model Badlands to simulate ¹⁰Be production, erosion and transport. These tools are applied to a source-to-sink system in the SW French Alps, where the model is calibrated. We propose a model that fits river incision rates and ¹⁰Be concentrations in sediments, and we show that ¹⁰Be in deep marine sediments is a signal with multiple contributions that cannot be easily interpreted in terms of climate forcing.