The experimental data for the case with vegetation along the inner bank in the strongly curved channel was digitized from Huai et al.1, while the data for the outer bank case was derived from Li et al.2. Furthermore, we have incorporated numerical simulation results using the 2DC, BVC, and 3DC models in the dataset. The dataset includes depth-averaged velocity, the vertical distribution of streamwise velocity, and the secondary flow structure, as illustrated in figure within the manuscript.

1. Depth-averaged velocity data for cases with vegetation along the inner and outer banks:
A. Curved channel_DA_innercase.xlsx
B. Curved channel_DA_outercase.xlsx
2. Vertical distribution of streamwise velocity
Curved channel_velocity_innercase.xlsx
3. Secondary flow structures:
A. Inner case
A.1. SF_2DC_inner.xlsx
A.2. SF_SBVC2_inner.xlsx
A.3. SF_SBVC3_inner.xlsx
A.4. SF_GBVC3_inner.xlsx
A.5. SF_kepsilon_inner.xlsx
A.6. SF_komegaSST_inner.xlsx
B. Outer case
B.1. SF_2DC_outer.xlsx
B.2. SF_SBVC2_outer.xlsx
B.3. SF_SBVC3_outer.xlsx
B.4. SF_GBVC3_outer.xlsx
B.5. SF_kepsilon_outer.xlsx
B.5. SF_komegaSST_outer.xlsx"
To visualize the secondary flow structure, we use Python with the code 'Visualizing secondary flow using Python.ipynb'

Data description:
1-n = 1 – (zs - z) / h, (0 = bed surface, 1= water surface)
R refers to radius from the measurement point to the center of the channel.
y/B refers to distance from the inner bank divided by the channel width.
h (m) refers to vertical distance from the measurement point to the bed surface.
u, v, and w refer to the streamwise, transverse, vertical velocities, respectively.
In the Excel dataset, sheet_name refers to cross-section measurement location (0-degree,45-degree, 90-degree, 135-degree, and 180-degree)

Experiments in meandering channels with partial vegetation carried out at the hydraulic experimental facility of Hiroshima University under fixed and movable bed conditions. Additionally, numerical simulation results using 2DC, BVC, and 3DC model have been included. The dataset comprises the vertical distribution of streamwise velocity, streamwise velocity at a spesific height (z = 0.5h), water surface profiles, sediment transport conditions and bed elevation profiles.
1. Vertical distribution of streamwise velocity under fixed bed condition:
A. Meandering_fb_velocity_at_M6.xlsx (section M6)
B. Meandering_fb_velocity_at_M7.xlsx (section M7)
C. Meandering_fb_velocity_at_M8.xlsx (section M8)
D. Meandering_fb_velocity_at_M9.xlsx (section M9)
E. Meandering_fb_velocity_at_M10.xlsx (section M10)
F. Meandering_fb_velocity_at_M11.xlsx (section M11)
G. Meandering_fb_velocity_at_M12.xlsx (section M12)
2. Streamwise velocity distribution at z = 0.5h under fixed bed condition:
Meandering_fb_velocity_at z=0.5h.xlsx
3. Water surface profile under fixed bed conditions:
Meandering_fb_water surface_profile.xlsx
4. Bed elevation profiles after reaching equilibrium conditions:
Meandering_mb_bed elevation profiles.xlsx
5. Water surface after reaching equilibrium conditions:
Meandering_mb_water surface profiles.xlsx
6. Bed load transport rate during experiment:
Meandering_mb_water surface profiles.xlsx
7. Bed elevation profile (Zb) on the left and right banks.
Meandering_mb_zb on the left and right.xlsx
8. Mesh
Meandering_mesh.xlsx

Data description:
X, Y refer to the coordinates in the X and Y axes.
h (m) refers to vertical distance from the measurement point to the bed surface.
u, v, and w refer to the streamwise, transverse, vertical velocities, respectively.
DZs is Zs – Zs at downstream end, where ZS refers to the water surface elevation (m).
Zb_initial (m) refers to the initial bed profile condition.
Zb_final (m) refers to the final bed profile condition after reaching equilibrium conditions.
DZB (m) refers to Zb_final – Zb_initial, where positive values indicate deposition and negative value indicate scouring.
Dzsection (m) refers to ZB_final – the average of ZB_final in each section
Distance (m) refers to the distance from the downstream end.

In the Excel dataset, the sheet_name corresponds to cross-section measurement locations from the left bank (y = 4.5 cm, y = 9.5 cm, y = 13.5 cm, y = 17.5 cm, y = 21.5 cm, y = 25.5 cm, y = 20.5 cm, y = 34.5 cm). However, in some instances, the sheet_name also represents cross-section identifiers such as M12, M11, M10, M9, M8, M7, and M6.

Rererences:
1 W. Huai, C. Li, Y. Zeng, Z. Qian, and Z. Yang, “Curved Open Channel Flow on Vegetation Roughened Inner Bank,” J Hydrodyn 24(1), 124–129 (2012).
2 C. Li, W. Xue, and W. Huai, “Effect of vegetation on flow structure and dispersion in strongly curved channels,” J Hydrodyn 27(2), 286–291 (2015).