A mathematical model for the calculation of sediment at the tail of tributary under condition of flow backwards is established, and the model is used to simulate the scouring and sedimentation deformations of the riverbed at a tributary of Yangtze River, Juzhang River, in this paper.

Feasibility of preventing impact of seawater encroachment by reverse osmosis predemineralization;

Taking indigowoad root as an example,irrigation forecast suitable for indigowoad root was conducted according to the historical data in Hongshuihe irrigation district.