Elevation model of Pulmankijoki river ice underside 2023

Description: Elevation model of river ice underside in mid-winter conditions reconstructed using Structure-from-Motion approach in Agisoft Metashape Professional (version 2.0.1) and control point locations used for georeferencing the elevation model. The original raw data used in the reconstruction was collected in Pulmankijoki River in February 2023 using professional remotely operated underwater vehicle Chasing M2 Pro and GoPro HERO10 Black camera. The raw data consisted of 3800 frames cut from video material. The underice elevation model has been reconstructed for calculating the hydraulic roughness of river ice underside. The research work has been conducted in Aalto University.

Funding: This work was supported by the Research Council of Finland (DefrostingRivers: 338480; HYDRO-RDI-Network: 337394; Digital Waters [DIWA] Flagship: 359248) and the Ministry of Education and Culture’s Doctoral Education Pilot (No. VN/3137/2024-OKM-6). In addition, the work was supported by The European Union – NextGenerationEU Recovery instrument (RRF) through Research Council of Finland projects Hydro RI Platform (346167) and Green-Digi-Basin (347703). The work was further supported by Maa- ja vesitekniikan tuki ry. The river-ice related measurements were initiated at Pulmankijoki River in 2014 under the post-doctoral research project of Dr Lotsari, funded by the Research Council of Finland (ExRIVER: grant number 267345), and this paper is a continuum in the series of these winter season studies.