MARHYD: Magdalena River Hidrodynamic model in Delft3D. Results of Case 1 (salinity and water level)

This database contains output files of MARHYD: the MAgdalena River HYdrodynamic model in Delft3D.

Model description:
The model domain of MARHYD extends from coordinates 10.9619 °N to 11.2669° N and from 74.7571 °W to 74.8784 °W. This domain includes the last 22 km of the river and estuary before discharging into the Caribbean Sea and 63 km by 37 km of the surrounding coastal region in east-west and north-south directions. In oceanic waters, the model is rectangular, configured on a 150 m x 150 m horizontal resolution near the open boundaries, with a gradual refinement to 50 m x 50 m near the river mouth. In the river and estuary, the model is curvilinear, with 10 horizontal cells in the transversal section, reaching a variable size between 40 m to 100 m. 40 Z-layers represent the water column with a higher resolution close to the surface. Layers of approximately 0.5 m cover the upper 10 m of the water columns, where most of the mixing processes between the river and the ocean occur. The vertical resolution reduces progressively from 10 m depth to the bottom.

The boundary conditions of salinity and currents with the Caribbean Sea (at the North, East, and West) were obtained from HYCOM + NODA reanalysis every 6 hours, and wind velocity was obtained from CFSR-NCEP/NCAR reanalysis every 1 hour for the wind stress. The bathymetry was derived from GEBCO, Nautical charts of the Maritime Directorate of Colombia (DIMAR), and high-resolution in-situ measurements. River discharge data were obtained from the nearest upstream hydrological station of the Magdalena River. The model was calibrated and validated using field data of salinity profiles along the river estuary and plume, velocity measurements in the river and estuary, and water level in the estuary for two climatic seasons.

Description of simulation case:
Case 1 corresponds to a low-discharge scenario with Q = 3400 m^3/s, equivalent to the 10th percentile of the historical freshwater flow.
Water currents, salinity and water level in the open boundaries correspond to the time-average of HYCOM Reanalysis database for the days between 9 and 29 of November of 2017.
Winds are constant with a speed of 10.5 m/s from the Northeast.
The full set of input (configuration) files of this simulation can be found in the dataset: Álvarez-Silva, Óscar; Barros, Yennis ; Saavedra, Victor; Cardona, Yuley; Cáceres-Euse, Alejandro; Osorio, Andres F.; Arbeláez, Felipe (2021), “MARHYD: Magdalena River Hydrodynamic model in Delft3D. Inputs of Cases 1 and 2”, Mendeley Data, V2, doi: 10.17632/hmhdvg47kg.2

Files description:
This dataset includes the salinity and water level results for the entire computational domain, every 8 hours, during 20 days of simulation. ​
The data is in .nc format.
Results of water velocity for this simulation case are available in the database: MARHYD: Magdalena River Hydrodynamic model in Delft3D. Results of Case 1 (water velocity), doi: 10.17632/vxs52f7fcd.2

本数据库包含MARHYD的输出文件——即基于Delft3D搭建的马格达莱纳河（Magdalena River）水动力模型。

模型描述：
该模型的模拟区域范围为北纬10.9619°至11.2669°、西经74.7571°至74.8784°，涵盖注入加勒比海前的最后22公里河道与河口区域，以及东西向63公里、南北向37公里的周边近岸海域。海洋区域采用矩形网格，开边界附近的水平分辨率为150 m×150 m，向河口方向逐渐加密至50 m×50 m；河道与河口区域采用曲线网格，横断面包含10个水平格点，格点尺寸在40 m至100 m之间可变。垂向采用40层Z坐标分层，表层附近分辨率更高：水柱上层10 m采用约0.5 m的层厚，该区域是河海混合过程的主要发生区；垂向分辨率从10 m水深向海底逐渐降低。

与加勒比海（北、东、西侧边界）的盐度与流场边界条件取自HYCOM + NODA再分析数据集，时间分辨率为6小时；风应力数据来自CFSR-NCEP/NCAR再分析资料，时间分辨率为1小时。水深地形数据整合了GEBCO、哥伦比亚海事总局（DIMAR）海图以及高分辨率现场实测数据。河道径流量数据取自马格达莱纳河上游最近的水文站。本模型已通过两个气候季节的河口及入海羽流区盐度剖面实测数据、河道与河口区流速实测数据、河口水位实测数据完成率定与验证。

模拟案例说明：
案例1对应Q=3400 m³/s的低流量情景，相当于历史淡水径流量的10%分位数。开边界的流场、盐度与水位数据采用2017年11月9日至29日的HYCOM再分析数据的时间平均值；风速恒定为10.5 m/s，风向为东北方向。本模拟的全套输入（配置）文件可从下述数据集获取：Álvarez-Silva, Óscar; Barros, Yennis; Saavedra, Victor; Cardona, Yuley; Cáceres-Euse, Alejandro; Osorio, Andres F.; Arbeláez, Felipe (2021), "MARHYD: Magdalena River Hydrodynamic model in Delft3D. Inputs of Cases 1 and 2", Mendeley Data, V2, doi: 10.17632/hmhdvg47kg.2

文件说明：
本数据集包含本次20天模拟期间内，每8小时输出一次的全计算域盐度与水位结果，数据格式为.nc。本案例的流速结果可从下述数据集获取：MARHYD: Magdalena River Hydrodynamic model in Delft3D. Results of Case 1 (water velocity), doi: 10.17632/vxs52f7fcd.2