Development of Web-based SWAT System

Non Point Source Pollution (NPSP) load had been arising as a significant environmental issue. Especially excessive NPS input to the water bodies is causing serious impacts on river or stream ecosystems worldwide. To develop efficient best management practices for water quality improvement, hot spot target areas first need to be identified and understood to develop proper action plans to restore river ecosystem. For simulation of NPSP influences on watershed, the Soil and Water Assessment Tool model (SWAT) has been widely used in many countries, by many researchers. But the SWAT model is a desktop-based system. Therefore there are many disadvantages over advantages of desktop-based system, especially when it is used for watershed management related decision making processes. In this study, the Web GIS-based SWAT system was developed, which provides Web GIS interface for the SWAT model installed on the server-side. The Web GIS-based SWAT provides simple-to-use interface to allow users to change the subbasin and HRU level input parameters, such as filter strip width, surface cover management, main channel slope, initial SCS CN II value, and so on. The Web-based SWAT system will provides valuable scientific information for watershed decision makers with ease-of-use Web GIS-based interface.