SEDIMENT BUDGET ESTIMATES FOR SHORELINE PROJECTIONS UNDER RISING SEA LEVELS

This study examines coastal dynamics along the central-southern coast of Rio Grande do Sul (RS), focusing on the interaction between the sediment budget (SB) and sea-level rise (SLR). Using the RanSTM model, the morphological response of the region to SLR was simulated. Calibration employed SB data estimated at different temporal scales: annual (DRONE surveys), decadal (satellite imagery), and long-term (stratigraphy and geophysics).本研究聚焦南里奥格兰德州（Rio Grande do Sul，RS）中南部沿海的海岸动力过程，重点探讨沉积物收支（sediment budget，SB）与海平面上升（sea-level rise，SLR）之间的相互作用。本研究采用RanSTM模型，模拟了该区域对海平面上升的地貌响应。校准过程使用了不同时间尺度下估算得到的沉积物收支数据：年度尺度数据来自无人机（DRONE）勘测，十年尺度数据来自卫星影像，长期尺度数据则源自地层学与地球物理学探测。