The data of sudden change of the main flow observed in a large-scale desilting basin located behind the main dike in the lower Yellow River indicated that the Markov probability prediction method can be used to predict the numbers of sudden change of the main flow with accuracy.

In this paper,according to the theory of over-satnrate transport concentration,the author puts forward calculation method of the whole process of silt movement on movable bed in desilting basin,including all calculations such as hydraulic factors,sedimentation rate,sedimentation feature and period etc.

The paper also provides structural drawings of the desilting basin and the storage tank with volu.

Study on effect of spillway trough on deposition efficiency of intermittent scouring sand basins;

The appraisal and analysis on geology characteristics of sand basin of Dayudu Dianguan station;

Analysis and check on the calculation methods of silt deposition rate in the sand basin of hydropower station;

Experiment study of flow s adjusting with flow board in sediment basin;

It is pointed out that adopting reservoir instead of sediment basin is feasible.

Theκ εturbulentmodelisusedtosimulatetheverticalflowfieldofsettlingbasin .

Itisaninterestingquestionforstudytoenablesettlingbasinwithspecialsettlingefficiencyin large -scaleirrigationdistrictinordertoprolongoperationtimeofsettlingbasinandeffectivelyuselandre sources.

Itcanbeseenthattheresultsofthismathematicalmodelstudydoesreallyforeseetoknow howtoregulatethedischargeandwaterlevelprocessesofthesafeoperationattheinletandtheoutletinthe settlingbasin ,anditcanbeusedinoperationschemestudyofthesett.

The design thought of the settling basin for sediment trapping by the vortex tube is presented in this paper with a practical engineering example.

This paper presents the experimental study of sand trapping by vortex tube in settling basin.

According to the working character of a hydraulic-continuative flushing settling basin and by means of hydraulic model experiment,a hinge problem of application of the spatially varied flow equation to a hydraulic-continuative flushing settling basin is preliminarily solved and the numerical solutions of these equations are proposed.

The results show that,the main reason for the severe deposition of the west sediment transport canal is that the surface slope is much smaller than the design slope owing to the sediment deposition in the sedimentation basin at the tail of the west sediment transport canal.

According to the design requirements of water diversion for sediment control of the Yangtze River to Han River Water Transfer Project, the sediment accumulation conditions in the water diversion canal with or without sedimentation basin are researched on the basis of basic hydrology sediment and engineering data by one-dimensional constant flow heterogeneous sand mathematical model.