HOW IMPORTANT ARE 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).

本研究针对巴西南里奥格兰德州（Rio Grande do Sul, RS）中南部沿海的海岸动力过程展开研究，重点聚焦泥沙收支（sediment budget, SB）与海平面上升（sea-level rise, SLR）之间的相互作用。研究采用RanSTM模型，模拟了该区域对海平面上升的地貌响应。模型校准阶段使用了不同时间尺度下估算得到的泥沙收支数据：年度尺度（无人机（DRONE）航拍勘测）、年代际尺度（卫星影像）以及长期尺度（地层学与地球物理探测数据）。