The HEC-RAS computation modeling results for forecasting climate driven hydrodynamic shifts in the lower Nemunas River using an integrated HEC-RAS, SWAT, SHYFEM modeling toolchain

These data sets are the result of the integrated HEC-RAS, SWAT, and SHYFEM modeling toolchain. Hydrological data were compiled for five gauging stations along the lower Nemunas River: Panemunė (Station 100), Lazdėnai (Station 101), Silininkai (Station 102), Atmata (Station 104), and Skirvyte (Station 105). The locations of the stations are shown in Figure 1 (Lower Nemunas River system and station locations). Note that the flow unit is m³/s, while water level and water depth are in meters (m). The folder “Model simulation with observed data” contains calibration and validation results, as well as river profile datasets. The calibration and validation data are put as daily time series, with the first column representing time and the remaining columns representing hydrological variables. For example, for Station 100, the data include observed and simulated water level (m) and depth (m), covering 2009–2015 for calibration and 2016–2020 for validation. Table 1. Data sample format in the model calibration result and the model validation result Day Station (100) Observed water level (cm) Simulated water level (m) Station (100) Observed Depth (cm) Simulated depth (m) 01/01/2009 3.89 4.75 3.94 4.8 01/02/2009 4.08 4.7 4.13 4.75 River profile data The first column indicates river reach. It is the name of the river at each section; please see Figure 1. River station (m) is the cross-section numbers (longitudinal position of each section along the river reach), with values decreasing in the downstream direction. For example, along the Atmata River, river station values decrease from 3236 m to 95 m downstream. At each river reach, ground elevation (m) and maximum water surface elevation (m) are included (please see Figure 2). Table 2. Data sample format in the River profile Reach River Station (m) Ground Elevation (m) Max WSE (m) Atmata 3236 -4.28 2.1 Atmata 3111 -4.12 2.08 Atmata 3000 -4.03 2.06 Projected data In this folder, the dataset is organized as a daily time series. The first column is the time period of record. The subsequent columns are simulated flow (m3/s) values generated by different climate models (ICHEC, HadGEM, MPI, and IPSL) under historical scenarios (1975–2005) and two emission scenarios (RCP4.5 and RCP8.5) for the near future (2020–2050) and the far future period (2069–2099). Projected River profile data Similar to the river profile dataset described above, the first column indicates the river reach. The second column, River Station (m). Ground elevation is provided for each cross-section, while the remaining columns show the maximum water surface elevation simulated under different climate models. Specifically, the dataset includes historical simulations (1975–2005), projected simulations for the near future (2020–2050), and projected simulations for the far future (2069–2099) under the RCP4.5 and RCP8.5 scenarios for the climate models ICHEC, HadGEM, MPI, and IPSL.