Aiming at the problems of siltation promotion and siltation return in the beach area of Hangzhou Bay. a numerical calculation model of hydrodynamic and scour and siltation in the south bank of Ningbo Bay was constructed. and the reliability of the short-term scour and siltation numerical calculation model was verified by combining with the field measured scour and siltation data. so a... https://toyscyclers.shop/product-category/learning-toys/