TY - CHAP A1 - Takaaki Uda A2 - Masumi Serizawa A3 - Shiho Miyahara ED1 - Takaaki Uda ED2 - Masumi Serizawa ED3 - Shiho Miyahara Y1 - 2018-12-19 PY - 2018 T1 - Derivation of the BG Model N2 - The authors have developed models for predicting beach changes applicable to various problems on real coasts. One of them is the contour-line-change model to predict long-term beach changes caused by the imbalance in longshore sand transport, which is a kind of N-line model. Because the calculation of the nearshore current is not needed in this model, and the computational load is small, it has an advantage in the prediction of long-term topographic changes on an extensive coast. However, the handling of boundary conditions becomes difficult when offshore coastal structures are constructed in a complicated manner, and in this regard the so-called 3D model has an advantage. Taking this point into account, the authors developed a morphodynamic model (BG model) by applying the concept of the equilibrium slope and the energetics approach, in which depth changes on 2D horizontal grids are calculated. BT - Morphodynamic Model for Predicting Beach Changes Based on Bagnold's Concept and Its Applications SP - Ch. 2 UR - https://doi.org/10.5772/intechopen.81411 DO - 10.5772/intechopen.81411 SN - 978-1-78984-946-2 PB - IntechOpen CY - Rijeka Y2 - 2020-12-03 ER -