Data of two observed flow patterns over a physical model

The dataset containing the orthoimages of two observed flow patterns from point sources over a physical model located in Hohai University. DEMs with multiple resolutions used in the reference are also contained. Specially, the sinks in the DEM are not removed. Citation: Wu, P., Liu, J., Han, X., Feng, M., Fei, J., & Shen, X. (2022). An improved triangular form-based multiple flow direction algorithm for determining the nonuniform flow domain over grid networks. Water Resources Research, 58, e2021WR031706.