Author(s): Kwan Tun Lee; Chung-Chieh Meng; Ming-Sang Yang
Linked Author(s): Kwan Tun Lee, Ming-Sang Yang
Keywords: Design discharge; Inquiry system; Geographic informationsystem
Abstract: The paper presents a geomorphic and hydrologic information system for soil and water conservation work in upland small watersheds. Since future landslide areas are unpredictable, geomorphic information of any location within the watershed is required. While using the inquiry system, users can interactively select a point only by clicking on the mouse at the desired location, and then consequent calculation procedures will be conducted. A compound module, which is based on SPOT image classification, digital elevation model, frequency analysis theory, and kinematic-wave approximation, can provide enough information for design discharge for different return period conditions. Moreover, this system allows users to modify land cover condition and watershed topography to realize the influences of the environment change on watershed hydrologic conditions. Future work of the inquiry system is to include detail hydrograph routing modeling for midsize and/or large watersheds design work.
Year: 2001