Polygon shapefiles that comprise levels of six environmental variables are used in conjunction with downed trees to inform the spatial analysis. A census of downed trees is created in each region within each environmental variable. Four environmental variables (elevation, generalized slope, Euclidean Distance From River [EDFR], Inundation Probability) were generated by classification of raster maps that have a resolution (1.0m) and pixel locations coincident to the topography raster map that is input into HEC-RAS and featured in Castillo et al. (under revew). Two classified variables (vegetation community, soil type) are informed by data form Ecological Mapping Systems of Texas (Elliott et.al., 2014)
Castillo, C. R., Güneralp, I, Hales, B. U., Güneralp, B. (in review). Scale-Free Structure of Surface-Water Connectivity within a Lowland River-Floodplain Landscape. Geophysical Research Letters.
Elliott, L.F., Treuer-Kuehn, A., Blodgett, C.F., True. C.D., German, D. Diamond, D.D. (2014). Ecological System of Texas: 391 Mapped Types, edited by Texas Parks and Wildlife Department and Texas Water Development Board, Austin, TX. url: https://tpwd.texas.gov/landwater/land/programs/landscape-ecology/ems/
Zevenbergen, L.W. and C.R. Thorne. (1987), Quantitative analysis of land surface topography. Earth Surface Processes and Landforms, 12, 47-56.
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