WEB-BASED DECISION SUPPORT SYSTEM FOR EVALUATION OF HYDROLOGICAL IMPACT OF URBAN SPRAWL
Jin‐Yong Choi, Bernard A. Engel, Shilpam Pandey, Jon Harbor · 2001 Sacramento, CA July 29-August 1,2001 · 2001
Decision support systems (DSS) that have been applied in the water engineering area were reviewed froma historical standpoint, and the DSS were described in terms of definition, structures and components. TheL-THIA web application that is a DSS based on an integration of WWWbased programs, GIS, anddatabases is also introduced. The L-THIA web DSS was analyzed from the point of view of DSS structurethat is comprised of a modeling system, database system and interface. As a DSS, L-THIA web has beenconstructed to support decision makers and to give them information about the hydrological impacts ofwater quantity and quality due to urban sprawl. To achieve these purposes, L-THIA web has a runoff andNPS estimation model, internet-GIS and ORACLE based weather database. The L-THIA web has its ownspecial features that were prepared for novice users who are targeted as the potential users of the L-THIAweb and would have limited knowledge about hydrology. Therefore, DSS enhancement features areintroduced that provide useful functions like impact evaluation, treatment suggestions and urban bestmanagement practices (BMP) cost estimation. The enhancement features can help and guide users indecision making, and increase users comprehension about the effects of urban sprawl on water quantityand quality.