Sediment budget of a cuspate shoreline and its influence on spit development—Lagoa dos Patos, Brazil

The coastal sediment budget is an essential tool to understand erosion/accretion patterns along coastlines and predict future changes. This work one of the first approaches a study in cuspate shoreline covering whole embayment-spit system. Taking this into consideration, aims estimate main longshore transport propose conceptual model regional lagoon (Lagoa dos Patos-Brazil), while also analyzing its influence on spit development. To do so, representative wind conditions (direction speed) were used force validated wave utilizing process-based modeling suite Delft3D. potential was computed widely distributed cross-sections, based cases, annual estimated. results showed pattern inter-related source storage areas bay beaches occurrence short-term nodal zones (convergent divergent), which have important control coast. central littoral cells embayments behave as temporary areas, southern act sources sediments spits. findings demonstrate that complex coastline shapes and, importance adjacent updrift cell supply for