FOCCUS WP9 MS9.1 Applications prototype: ESC1 - 1.2.2 - Coastal erosion dynamics assessment of the German North Sea

Dataset Description Overview This dataset contains example imagery and data on analysed simulation outputs from the FOCCUS WP9 MS9.1 Applications prototype: ESC1-1.2.2 - Coastal erosion dynamics assessment of the German North Sea. The prototype application used GCOAST-GB to investigate nature-based solutions (NbS) for reducing coastal erosion risk. Simulations were carried out in the German Bight using a regional, unstructured-grid hydrodynamic, wave and sediment model. GCOAST-GB Setup for German Bight Underlying simulations were conducted using a coupled modeling approach integrating the hydrodynamic model SCHISM (https://doi.org/10.1016/j.ocemod.2016.05.002), the wave model WWM, the sediment transport model SED3D and a vegetation module that accouns for the effect of vegetation on hydro and wave dynamics, all coupled within the SCHISM framework(ccrm.vims.edu/schismweb/). The used grid configuration for the two studies areas are as follows: German Bight: The grid setup follows Jacob et al. (2023) [DOI: 10.1007/s10236-023-01577-5]. The model area consists of 476 k nodes and 932 k triangular and quadrangular elements, with the horizontal resolution, varying between a maximum of 1.5 km at the open boundary and a minimum of 50 m in the estuaries. The vertical dimension is resolved using 21 terrain-following sigma coordinates. Data Structure The fodlers and files encompass Top-level folders and files CNTRL/NetCDF outputs for the control scenario (no vegetation / baseline). SCENARIO/NetCDF outputs for the vegetation scenario (with NbS intervention). grid/Unstructured model grid files (hgrid.gr3, hgrid.ll, vgrid.in) and parameterization (param.nml). all three contained within SCENARIO.zip plots (.png)Pre-computed figures illustrating attenuation effects and erosion risk reduction. code NbS_erosion_impact_plots.py: Script to create the png files based of the provided netCDF files schism.py: Python library to read Schism grid files. environment.yaml conda environment list with the needed packages to run the codes The CNTRL/ & SCENARIO/ folders each encompass the netCDF files: File name Description Unit / Content bottomStress_quantile95_1.nc 95th percentile of combined bottom stress Pa sigWaveHeight_quantile95_1.nc 95th percentile of significant wave height m totalSuspendedLoad_quantile95_bottom_1.nc 95th percentile of near-bottom suspended sediment concentration kg/m³ CriticalBottomStressRatio.nc Erosion risk index, categorized: 0 = No risk, 1 = Low, 2 = Increased, 3 = High Risk index (0–3)数据集说明 概述 本数据集包含FOCCUS WP9 MS9.1应用原型ESC1-1.2.2——德国北海海岸侵蚀动力学评估的示例影像与经分析的模拟输出数据。该原型应用采用GCOAST-GB模型开展研究，以评估基于自然的解决方案（NbS）降低海岸侵蚀风险的效果。模拟实验在德国湾开展，采用区域非结构化网格水动力、波浪及泥沙耦合模型进行计算。 德国湾GCOAST-GB模型配置 本次模拟采用耦合建模框架，整合了水动力模型SCHISM（https://doi.org/10.1016/j.ocemod.2016.05.002）、波浪模型WWM、泥沙输运模型SED3D，以及用于量化植被对水动力与波浪动力学影响的植被模块，所有模块均在SCHISM框架内完成耦合（ccrm.vims.edu/schismweb/）。两个研究区域的网格配置如下： 德国湾：本次网格配置参考Jacob等人2023年的研究[DOI: 10.1007/s10236-023-01577-5]。模型区域包含47.6万个节点与93.2万个三角形及四边形单元，水平分辨率在开边界处最高为1.5 km，河口区域最低为50 m。垂直方向采用21层地形追随σ坐标进行分层。 数据结构 本数据集包含以下文件夹与文件： ### 顶级文件夹与文件 1. CNTRL/：控制情景（无植被/基准情景）的NetCDF输出文件。 2. SCENARIO/：植被干预情景（采用NbS干预）的NetCDF输出文件。 3. grid/：非结构化模型网格文件（hgrid.gr3、hgrid.ll、vgrid.in）与参数配置文件（param.nml）。 上述三个文件夹均打包于SCENARIO.zip压缩包中。 4. plots/：预生成的可视化图件（.png格式），用于展示波浪衰减效应与侵蚀风险降低效果。 5. code：代码文件 - NbS_erosion_impact_plots.py：基于提供的NetCDF文件生成可视化图件的Python脚本。 - schism.py：用于读取SCHISM模型网格文件的Python工具库。 - environment.yaml：包含运行上述代码所需依赖包的Conda环境配置文件。 CNTRL/与SCENARIO/文件夹下均包含以下NetCDF文件： 文件名：bottomStress_quantile95_1.nc 文件说明：综合底应力的95分位值 单位/内容：帕斯卡（Pa） 文件名：sigWaveHeight_quantile95_1.nc 文件说明：有效波高的95分位值 单位/内容：米（m） 文件名：totalSuspendedLoad_quantile95_bottom_1.nc 文件说明：近底悬浮泥沙浓度的95分位值 单位/内容：千克每立方米（kg/m³） 文件名：CriticalBottomStressRatio.nc 文件说明：侵蚀风险指数，分类规则为：0=无风险，1=低风险，2=中等偏高风险，3=高风险 单位/内容：风险指数（0–3）