Study on propagration time of flood peak for Liaohe river and its tributarys in Shenyang city area;

Based on the date of Chaohu river network of waterways area 8 survey station of many year materials,The relations between,its flood peak and the year of the largest flood runoff one day is established,its corresponding coefficient of variation Cv value is calculated and the distribution rule and origin of the Cv value is analyzed.

The Gumbel logistic model is used to describe the dependent structure between the flood peak and flood volume and a bivariate joint distribution of peak-volume using PDS sample approach is developed.

Experimental study on effects of flood peak discharge on formation of cross-section in the lower Yellow River;

Effection factors on the accuracy of flood peak discharge using gradiet method;

Based on Min Qian power function formula of flood grade, one method for classifying flood grades by standardized value of flood peak discharge or flood peak stage is put forward in this paper.

The feasibility of adopting steep slope mining at main quarry is discussed against stripping ratio is high in flood peak period,and the preliminary scheme is put forward.

2 m of Tongguan elevation in peach flood season under the present boundary condition of the channel are as follows: peak discharge of Tongguan Station 2 500 m3/s,flood volume of 10 d 1.

At the same time,the design flood peak discharge and hydrograph are calculated by analyzing the flood of YanQu gauging station and the frequency of the flood.

The obtained new formula of peak discharge envelope curve of known maximum flood in the world according to a vast amount of f.

Mechanism of flood peak increase along the lower Yellow River and its verification;