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Development of Web GIS based VFSMOD System to Simulate Sediment Reduction Efficiency with Vegetative Filter Strip

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2008 Providence, Rhode Island, June 29 – July 2, 2008  084527.(doi:10.13031/2013.24778)
Authors:   Younshik - Park, Nam-Won - Kim, Bernie Engel, Jong-Gun - Kim, Won-Seok - Jang, Jun-Ho - Park, Joongdae - Choi, Kyoung Jae Lim
Keywords:   Keywords: Filter strip, soil erosion, sediment, water quality, VFSMOD, Web GIS VFSMOD

In recent days, the Non Point Source Pollution has been arising as a big environmental issue. Especially muddy water problem is causing serious impacts on river ecosystem not only in Korea but also most of the countries. Accordingly many methods to manage and prevent this problem have been investigated such as greet chamber, reservoir or debris barrier. However, the VFS is thought to be the one of effective methods. However the effective width of the VFS first needs to be determined before VFS installation in the field. To provide ease-of-use interface with scientific VFS modeling engine, the Web GIS based VFSMOD system was developed in this study. The Web GIS based VFSMOD uses UH and VFSM as core engines to simulate rainfall-runoff and sediment trapping. The provide soil information of 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. Two versions of the Web GIS based VFSMOD system were developed; one is Single Storm Event Analysis and the other is Multiple Storm Event Analysis options. With these two options in the Web GIS based VFSMOD system, the users can easily simulate the effects of filter strip under given rainfall event using the Single Storm Event Analysis mode and determine optimum filter strip width using the Multiple Storm Event Analysis mode. These two versions were applied to the study watershed located at Gangwon province in Korea to demonstrate how the Web GIS based VFSMOD system can be used in VFS analysis. It was found that the VFS efficiencies are dependant on storm amounts and filter strip width.

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