The benefits quantification of reservoir dredging is one of the increasingly important but still in the preliminary research stage in China's water conservancy economy

and it is also an important evaluation content for the effective planning and implementation of reservoir dredging projects. Due to the complexity of benefits

reservoir dredging is mostly selected based on investment and cost

lacking a comprehensive measurement of input and output. This article analyzes the influencing factors of reservoir dredging benefits

adopts a basic research approach from qualitative to quantitative

establishes a hierarchical structure and indicators for evaluating reservoir dredging benefits

and proposes a qualitative indicator benefit substitution method and a quantitative indicator calculation method in the quantitative calculation of reservoir dredging benefits

which can provide scientific reference for future benefit calculation of reservoir dredgings.