Abstract
In recent years, Non-Point Source Pollution has been rising as a significant environmental issue. The sediment-laden water problem is causing serious impacts on river ecosystems not only in South Korea but also in most countries. The vegetative filter strip (VFS) has been thought to be one of the most effective methods to reduce the transport of sediment to down-gradient area. However, the effective width of the VFS first needs to be determined before VFS installation in the field. To provide an easy-to-use interface with a scientific VFS modeling engine, the Web GIS-based VFSMOD system was developed in this study. The Web GIS-based VFSMOD uses the UH and VFSM executable programs from the VFSMOD-w model as core engines to simulate rainfall-runoff and sediment trapping. To provide soil information for a point of interest, the Google Map interface to the MapServer soil database system was developed using the Google Map API, Javascript, Perl/CGI, and Oracle DB programming. Three modules of the Web GIS-based VFSMOD system were developed for various VFS designs under single storm, multiple storm, and long-term period scenarios. These modules in the Web GIS-based VFSMOD system were applied to the study watershed in South Korea and these were proven as efficient tools for the VFS design for various purposes.
Highlights
In recent years, sediment transport in runoff has been considered one of the serious environmental problems worldwide
To provide an easy-to-use interface with a vegetative filter strip (VFS) modeling, the Web GIS-based Vegetated Filter Strip model (VFSMOD) system was developed in this study
The Web GIS-based VFSMOD system is composed of three integrated modules, “Single Storm Event Analysis (SSEA) module”, “Multiple Storm Events Analysis (MSEA)
Summary
Sediment transport in runoff has been considered one of the serious environmental problems worldwide. The VFS is designed to remove sediment, and other pollutants such as nutrients and pathogens from surface water runoff by filtration, deposition, infiltration, adsorption, absorption, decomposition, and plant uptake [2]. Reducing the velocity of runoff from source areas such as farmland or agricultural areas, the VFS causes sediment to be deposited. The desktop-based models should be installed, need to be updated; different results can be calculated without timely updates [7,8]. The Vegetated Filter Strip model (VFSMOD), developed by Munoz-Carpena and Parsons [2], is a desktop-based model. It requires many various input data as it considers various conditions of upland field and the VFS. This could be merit of the desktop-based VFSMOD system, but demerit because of extensive input data requirement
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