Associations between Landscape Factors, Intermittency Classes,
and Hydrologic Metrics
We observed moderate associations among environmental covariates and
whether streams fully dried, or only dried to isolated pools (Figure 4),
although none exhibited statistically significant differences (Table 4).
Streams that fully dried had generally smaller watershed areas and lower
slopes, and higher forested cover ratios.
Similarly, hydrologic metrics were only moderately associated with
landscape factors (Table 5). Watershed area was correlated with metrics
of skew (0.61), reversals (0.73) and pulse count (0.52). Reversals were
correlated with watershed slope and water table depth, while pulse count
was correlated with percent forest cover. Interestingly, low flow
metrics were less correlated with landscape factors than metrics
associated with flow variability and high flow.