ĐÁNH GIÁ BIẾN ĐỘNG MỰC NƯỚC VÀ NGẬP LỤT VÙNG HẠ DU SÔNG SÀI GÒN DƯỚI TÁC ĐỘNG CỦA ĐÔ THỊ HÓA, XÂY DỰNG CÔNG TRÌNH CHỐNG NGẬP VÀ XẢ LŨ CÁC HỒ CHỨA NƯỚC THƯỢNG LƯU

Abstract

Flooding in Saigon – Dongnai river downstream is caused by 3 main factors: rain, flood and tide. The problem is exacerbated by inadequate drainage capacity, low-lying terrain, subsidence, spatial planning, inappropriate policies and regulations, lack of awareness and involvement of community. With the application of numerical modelling, the authors present the research results of hydraulic calculations, thereof assessing the fluctuation of water level and inundation in downstream area under the influence of urbanization, preventing flood structures and discharge from upstream reservoirs in each group of specific scenarios. The findings show the causes of inundation, thereby proposing appropriate solutions to prevent flooding and minimize flood risk.