The Hydrological and Hydraulic Design and Analysis System Platform for Important River Basins in Taiwan is a GIS-based platform developed to support integrated river basin planning and management.
The platform provides basin management agencies with essential physiographic, hydrological, and hydraulic information required during river management planning. This includes watershed characteristics upstream of selected control points, watershed boundaries, river networks, township boundaries, road layers, and other spatial data. It also provides hydrological and hydraulic information for specific rainfall events or design storms with selected return periods, including runoff in upper and middle watershed areas and water levels in middle and lower river reaches.
Because these data are complex and spatially distributed, the platform uses a geographic information system to provide a graphical user interface. This allows engineers and planners to access, calculate, and review basin information more efficiently. The platform is designed to support engineering planning, hydraulic design, flood management, and river basin administration.
In 2016, the Water Resources Planning Branch completed the Hydrological and Hydraulic Design and Analysis System Platform for Major River Basins in Taiwan. The system was built using an open-source GIS framework, an application database, and online data-updating functions. Based on updated digital elevation data, digital elevation models were established for 26 major river basins in Taiwan. The system also developed functions for calculating watershed physiographic factors and conducting hydrological and hydraulic analysis required by planning and management agencies.
In 2022, the platform was upgraded with a newer QGIS framework and expanded into the Hydrological and Hydraulic Design and Analysis System Platform for Important River Basins in Taiwan. The system provides water resources engineers and river planners with detailed physiographic, hydrological, and hydraulic information. It can serve as an important reference for flood protection planning, riverbed stability analysis, and the development of river management strategies.