Schematized Model of the Lower Rhine River and its Branches in SOBEK RE

Input files and model output for a schematized 1-D morphodynamic model of the Lower Rhine System (from Bonn in Germany to Vuren, Schoonhoven, and Keteldiep in the Netherlands)<br>These files are related to the manuscript " <em>Climate Change Impacts on Flow Partitioning in a River Bifurcation System</em> " submitted to Geophysical Research Letters.<br>The Input files include<br>- Model_cross_sections: cross-section data, with the main channel and floodplain width at each cross-section- initial mean bed elevation: Initial mean bed elevation of all the branches- initial bed composition: Initial bed and subsurface composition per grid cell formatted as input to SOBEK RE- internal and external morphological boundary conditions: Sediment flux at the upstream boundary and nodal point relations at the two bifurcation nodes formatted as input to SOBEK RE- Boundary condition_Upstream discharge: Hydrograph at the upstream boundary for the reference case and the scenarios- Boundary condition_Downstream water level: Water level at the downstream boundaries for the reference case and the scenarios (Please check SI to separate which boundary condition fits with which scenario)- GRAINP: Mixed size sediment input file for SOBEK RE<br>A list of runs used in the manuscript is also added.Model results<br>- flow_discharge_output.xlsx : Flow discharge at Lobith and the upstream part of the bifurcates for all the model runs- bed_level_output.xlsx: yearly averaged bed level for the entire reach for all the model runs- Dg_transport_output/DG_surface_output: 20-year averaged geometric mean grain size of the flux and bed surface over the entire reach for the reference case, hydrograph scenario Hn, and combined scenario Hn-SSP 585<br>In addition, the field data collected by Rijkswaterstaat on bed surface grain size in the Dutch Rhine in 2020 (2020_bed_surface_data.xlsx) is also included. These data have been used as information to derive the model input grain size fraction content. The data has been averaged over width; we only used data for locations where right, left, and center samples were available.<br>

针对下莱茵河系统（德国波恩至荷兰弗伦、斯库恩霍芬与凯特尔迪普河段）的概化一维地貌动力学模型输入文件与模型输出结果。
本数据集关联投稿于《地球物理研究快报（Geophysical Research Letters）》的论文《河道分流系统的水沙分配对气候变化的影响》。

输入文件包含：
- Model_cross_sections：断面数据，包含各断面的主河道与漫滩宽度信息
- 初始平均床面高程：所有分流河道的初始平均床面高程
- 初始床面组成：按网格单元划分的初始床层与地下层沉积物组成，格式适配SOBEK RE模型输入要求
- 内外地貌动力学边界条件：上游边界的泥沙通量与两个分流节点的节点关系数据，格式适配SOBEK RE模型输入要求
- Boundary condition_Upstream discharge：参考情景与各模拟场景下的上游边界流量过程线
- Boundary condition_Downstream water level：参考情景与各模拟场景下的下游边界水位（请查阅补充材料（SI）以明确各边界条件对应模拟场景）
- GRAINP：适配SOBEK RE模型的混合粒径沉积物输入文件

本数据集同时收录了论文中使用的全部模拟工况列表。

模型结果包含：
- flow_discharge_output.xlsx：所有模拟工况下，洛比思（Lobith）河段及各分流河道上游段的流量数据
- bed_level_output.xlsx：所有模拟工况下，全研究河段的年平均床面高程数据
- Dg_transport_output/DG_surface_output：参考情景、流量过程线场景Hn以及组合情景Hn-SSP585下，全研究河段泥沙输运通量与床面表层沉积物的20年平均几何平均粒径数据

此外，数据集还包含荷兰皇家水利工程局（Rijkswaterstaat）2020年采集的荷兰莱茵河段床面表层沉积物粒径实测数据（2020_bed_surface_data.xlsx）。该数据用于推导模型输入的沉积物粒级占比：数据已按河段宽度进行平均，且仅采用了同时具备左岸、右岸与中心采样点的点位数据。