The Xin'anjiang Hydrological Model: Theories, Evolutions And Applications

Xinnan Zhang, Hohai University, China

Abstract for Weekly Colloquium on Thursday, October 13, 2016 at 4 pm in PAS 220

Hydrological models are essential tools for investigating hydrological processes at both hillslope and watershed scale. These models have been recognized as efficient non - engineering measures for flood control and water resources management. The Xin’anjiang (XAJ) hydrological model is a conceptually-based model, which has been developed on the basis of conception of hillslope hydrology and widely applied in humid and semi-humid regions of China for real-time flood forecasting and water resource management. In the first part of this talk, description of the XAJ model will be introduced, including the theoretical basis, computational procedures, assumptions, and generalizations, etc. Then for the second part, the evolutions and improvements of the XAJ model will be presented, e.g. estimating parameters based on the catchment surface characteristics and coupling of an energy balance scheme to the original mass balance scheme, etc. These evolutions and improvements helped overcome the defects of the XAJ model and extend its applications. In the last part of this talk, some case studies of the XAJ model applied in China regarding real-time flood forecasting and water resource management will be discussed to show the significance roles of the XAJ model playing in flood control in China.