Abstract
AbstractDespite the documented evidence of geomorphic characteristics on flooding, an understanding of the relative effects of the geomorphic characteristics on flooding remains elusive. The objective of this study is to investigate the relationship between flooding and geomorphic characteristics in Indiana, United States, by using data at 94 streamflow gauging stations. The flood magnitude as determined through the flash flood index is categorized into three groups, including moderate, extreme, and severe. The flood in each group is then related to geomorphic characteristics, including topography, morphometry, slope, land use, soil, channel network, and aspect through stepwise regression. Results show that extreme flooding is most affected by watershed morphometry, particularly watershed length, whereas severe flooding is most affected by watershed slope and land use type. The methodology used in this study also highlights that the stronger the severity of flooding, the more it is explained by geomorphic...
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