Application of Three-dimensional Modeling in a Hydrologic Test Reach.

To address the problem that the display effect of hydrologic test data was not intuitive, the three-dimensional modeling technology of a hydro- logic test reach based on GIS technology was proposed. The reach of of the YeHow River around Lanzhou hydrological station was selected to study three-dimensional modeling. The elevation data of river was processed through three-dimensional model constructing, water surface modeling and three-dimensional animation demonstration by using ArcGIS Pro software. Based on the historical highest flood level data of the test reach on September 15, 1981, the real scene restoration was carried out based on the three-dimensional model, and the hydrological factors such as water depth and channel storage were analyzed. The three-dimensional modeling based on GIS technology can directly and realisticany reflect the changes of topography and water surface of the test reach, and improve the application of hydrologic test results in flood control. [ABSTRACT FROM AUTHOR]