Abstract: For defending sudden water pollution accidents’ impact on water environment and providing accident disposal plans with scientific basis, simulation platform for sudden water pollution based on B/S are researched. Taking a river located in Zhejiang province as example, this paper combines traditional instantaneous source water quality model and modern computer science using PHP+MySQL frame. The platform can estimate water quality variation process, unattainment time, unattainment rate and polluted river range. The development of platform provides decision evidence for hydraulic and environment department to know probable impact caused by accidents and work out disposal plans.

Key words: water pollution accident, simulation platform, browser/server, water quality