Civil engineers in hydraulic and overland flow assessment are responsible for conducting studies and evaluations of water flow patterns, flow volumes, and the impacts of these flows on various infrastructure systems and the environment. This can involve using computer models and simulations, conducting field measurements, analyzing data and making predictions about future water flows, and assessing the impacts of changes in land use, weather patterns, and other factors on water flow patterns. They also work to design and implement solutions for managing water flow and preventing or mitigating its negative impacts, such as erosion, flooding, or loss of water quality. This may involve designing and building water retention systems, developing and implementing best management practices for land use, and working with other stakeholders to promote sustainable water management practices.