Figure Captions
FIGURE 1. Map of the lower San Rafael River and the study area region showing regions of remote mapping: the valley plug and reference reaches. Boundary reaches (or areas) are defined as regions located at the upstream and downstream of the expanding valley plug. Confluence junctions are shown, and the Colorado River and Green River are highlighted on the subset map.
FIGURE 2. Proportion of geomorphic units within each habitat type as a metric of habitat diversity (A) and substrate types by count for the three habitat types (B).
FIGURE 3. Total area of inundation for two years, 2009 and 2015. Measurements were calculated for A) the valley plug and two reference reaches: B) Spring Canyon and C) Moonshine Wash. The lower extent of the boxplots represents the bottom quartile (25%), the line represents the median, and the upper extent of the box represents the upper quartile (75%). The whiskers extend to the minimum and maximum values, within the 1.5 interquartile range), and outliers are represented by points.
FIGURE 4. Areas for upland (dark shading) and riparian (light shading) vegetation collected via drone and historic imagery for two time periods, 2009 and 2015. Measurements were calculated for A) the valley plug and two reference reaches: B) Spring Canyon and C) Moonshine Wash. The box represents the 25%, median, and 75%. The whiskers extend to a maximum of 1.5 interquartile range, and outliers are represented by points.
FIGURE 5. Riverscape inundation mapping results for imagery collected in 2009, 2015 and 2021. Imagery was collected in the same reach of river for all three years, located upstream of Cottonwood Wash, and in the valley plug.
FIGURE 6. (A) Percent valley bottom inundation for three time periods: 2009, 2015 and 2021 for the reach upstream of Cottonwood Wash within the valley plug. (B) Shannon Evenness Index values for total inundation area (m2) calculated for 2009, 2015 and 2021 surveys upstream of Cottonwood Wash within the valley plug. For each box represents the 25%, median and 75%. The whiskers extend to a maximum of 1.5 interquartile range.
FIGURE 7. Map of geomorphic units (e.g., confluences, diffluences, large wood and riffles) for three time periods: 2009, 2015 and 2021 upstream of Cottonwood Wash within the valley plug.
FIGURE 8. Map of vegetation types for three time periods: 2009, 2015 and 2021 upstream of Cottonwood Wash within the valley plug. Vegetation types are split into riparian and upland.