Abstract
Mountain torrent disaster warning system is a significant non-engineering flood prevention measure for achieving the goals of flood prevention and disaster reduction in the related small rivers. After analyzing the design principle and objective of the system, we proposed a mountain torrent disaster warning system based on WEB GIS technology and the distributed hydrological model (DHM) of the river basin. The system includes multiple subsystems, namely, system management, 2D/3D Web GIS, rainfall and water information management, mountain torrent disaster prevention and control information management, flood forecasting, mountain flood forecasting and response, flood control project information management, duty and flood control business management, data synchronism, system auto-update and operating condition monitoring. The proposed DHM-based mountain torrent disaster warning system can help the users to master the water and rainfall information in first time, analyze the flood evolution, make the forecasting and display the forecasting results via the terminal. Accordingly, the administrative departments in charge of water conservancy can rapidly issue the mountain torrent forecasting messages and make timely flood-control and rescuing deployments, with the aims of effectively enhancing the timeliness of warning and reducing the induced casualties and property losses.
