Experimental Research on the Erosion Pattern and Protection Using the Extended Modelling Method

-In the paper the extended modelling method with serial sands is used in an experimental re-search on the erosion patterns at the discharge outlet of a beach Hua-Neng power plant.The theoretical ba-sis for the extended modelling method with serial sands is systematically presented in the paper and themethod has been successfully employed in the sediment experiment of coastal works.According to theFroude Law,the model is designed to be a normal one with movable bed,the geometric scaleλ_L=λ_H=15,and three scales of sediment grain size are chosen,i.e.,λ_(d1)=0.207;λ_(d2)=0.393;andλ_(d3)=0.656.The median particle diameter of sea beach prototype sand d_(50p)=0.059mm and the dis-changed water flow of the power plant is 21.7m~3/s.Three types of natural sea sands have been chosen asthe serial modelling sands to extend the simulation of the prototype,thus replacing the conventional test inwhich artificial lightweight sands are used.As a result,this method can not only reduce the costsignificantly,but also it

Experimental Research on the Erosion Pattern and Protection Using the Extended Modelling Method