Год выпуска: 2012 Автор: Mohammad Nazim Uddin Издательство: LAP Lambert Academic Publishing Страниц: 264 ISBN: 9783659173370
Описание
Riverbank erosion is a serious problem in Bangladesh. Different type bank protection works have been constructed along the Jamuna River. Almost every year some of the banks protection structures are damaged. A study was conducted: (i) to investigate flow and erosion processes around bank protection works, (ii) to investigate flow and erosion processes at bends (iii) to develop of an analytical erosion prediction model and, (iv) to integrate indigenous and technical knowledge for sustainable erosion management. It is revealed that the change of morphology, oblique flow generation by sand bar and dune movement mainly govern the failure of the hardpoint. The reasons of the failure of the RCC spurs are as follows: generation of oblique flow as a result of upstream morphology, strong parallel flow upstream of the spurs and development of deep channel due to flow circulation normal to the spurs. It is found that the amplified shear velocity near the bank line and secondary current are the...
