Spatial and Statistical Similarities of Local Soil Water Fluxes

Temporal persistence of spatial patterns in throughfall

“…Several researchers have used Spearman's rank correlation test to compare normalized throughfall amounts or soil moisture at individual sites between time periods (e.g., Vachaud et al, 1985;Raat et al, 2002;Si, 2002). We found this technique to be less powerful than the stability plot approach for detecting temporal persistence in middle-quantile sample points, because large variations in rank among time periods may arise from only minor differences in throughfall.…”

“…Research has shown that spatial variation of throughfall and the resulting infiltration variation contribute to spatial variation in soil moisture patterns in forest soils (e.g., Eschner, 1967;Bouten et al, 1992;Si, 2002;Zhou, et al, 2002;Schume et al, 2003;Raat et al, 2002). However, owing to spatial variability of soil thickness and physical properties, it is often not possible to relate patterns in throughfall directly to patterns in water content (Raat et al, 2002).…”

“…Spatial variation in infiltration influences spatial variation in a range of physical, chemical, and biological processes, including soil moisture (Eschner, 1967;Bouten et al, 1992;Si, 2002;Zhou, et al, 2002;Schume et al, 2003;Raat et al, 2002), pedogenesis (Buol et al, 1989;Baba and Okazak, 1999), nutrient cycling (Chang and Matzner, 2000), root growth (Ford and Deans, 1978), composition of the forest floor (Mottonen et al, 1999), soil solution chemistry (Manderscheid and Matzner, 2000), groundwater chemistry (Bottcher et al, 1997), and streamwater chemistry (Beier, 1998). The spatial and temporal variability of throughfall therefore is potentially an important control on watershed Journal of Hydrology 314 (2005) hydrology and biogeochemistry (Zirlewagen and von Wilpert, 2001).…”

A virtual experiment on the effects of evaporation and intensity smoothing by canopy interception on subsurface stormflow generation

“…Several studies have shown that this spatial variation and the resulting infiltration variation contribute to spatial variation in soil moisture patterns in forest soils (e.g., Eschner, 1967;Bouten et al, 1992;Si, 2002;Raat et al, 2002;Zhou et al, 2002;Schume et al, 2003). However, owing to spatial variability of soil thickness and physical properties, it is often not possible to relate patterns in throughfall directly to patterns in soil water content (Raat et al, 2002).…”

Spatial heterogeneity and temporal stability of throughfall under individualQuercus brantiitrees

“…Spatial patterns in TF input have important implications for sampling strategy and interpretation of TF data in terms of average water and ionic inputs (Zimmermann et al ., ). Moreover, they can affect the heterogeneity of hydrological, biogeochemical and ecological process on the forest floor (Keim et al ., ), for example, soil moisture (Eschner, ; Bouten et al ., ; Raat et al ., ; Si, ; Schume et al ., ), nutrient cycling (Chang and Matzner, ), composition of the forest floor (Mottonen et al ., ), root water and nutrient uptake (Bouten et al ., ) and water and ion fluxes in forested watersheds (Zirlewagen and von Wilpert, ). In addition, variability in TF may contribute to the spatial variability of soil fertility if the spatial patterns are stable in the long run (Wullaert et al ., ).…”