Throughfall, Stemflow and Interception Loss in a Mixed White Oak Forest (Quercus serrata Thunb.)

Abstract

Throughfall and stemflow measurements in a 60-year-old white oak stand (Quercus serrata Thunb.) were carried out during two periods totalling eleven months, from August to November 1993 and from May to November 1994, in order to clarify the rainfall partitioning of this forest. Troughs and spiral-type stemflow gauges connected to tipping bucket-gauges were used for throughfall and stemttow measurements. Seventy-five storms were analyzed individually. Coefficients of variation for throughfall and stemflow ranged between 5 -25% and 20-70% respectively. Partitioning of net rainfall in throughfall and stemflow represent 72% and 10% of the gross rainfall respectively. Multiple regression analyses were carried out to determine the stemflow variability. It was determined that maximum rain intensity was highly correlated with stemflow and this variable explained a further 5.5% of the stemflow variation. Estimates of averaged lag time and drainage after rain cease for stemflow were 290 and 164 min, while estimates for throughfall were 60 and 104 min. respectively. The canopy saturation was estimated from continuous storms and showed a value of 0.6 mm. The trunk storage capacity was estimated at a value of 0.2 mm, The interception loss from the forest canopy was estimated in 18%. Interception loss was heighly correlated with rainfall characteristics such as duration and intensity.

Spatial variations in throughfall in a Moso bamboo forest: sampling design for the estimates of stand‐scale throughfall

“…In addition, the average CV Tf in this study, 14Ð6%, was within the range of CV Tf values measured in temperate forests: 14-22%, summarized by (Staelens et al, 2006). Furthermore, CV Tf obtained in this study was similar to values reported for broadleaf forests in Japan: 11Ð8% for a mixed white oak forest (Silva and Okumura, 1996), 13Ð2% for an oriental oak forest (Otsuki, unpublished data) and 17Ð2% for a broadleaved secondary forest (Deguchi et al, 2006). Rf in each weekly period included rainfall for 1-6 rainfall events.…”

The influence of seasonal changes in canopy structure on interception loss: Application of the revised Gash model

“…5(b). These results are similar to those for a mixed white oak forest in Japan, which had a mean value of 11.8% and a range of 5-25% (Silva and Okumura, 1996). …”

“…Many studies have examined evergreen forests, which have a constant canopy structure, whereas few have considered deciduous forests. Furthermore, most studies of deciduous forests have only included measurements from the growing season (Calheiros de Miranda and Butler, 1986;Silva and Okumura, 1996;Price and CarlyleMoses, 2003); very few studies have included both the growing and the dormant seasons (Dolman, 1987;Park, 2000). Therefore, little is quantitatively known about how the differences in leaf amounts between the growing season and the dormant season affect interception loss.…”

Field estimation of interception in a broadleaf forest under multi-layered structure conditions

“…Our estimated mean Ic/R in overstory canopy plots (plots C and T o ) ranged from 21 to 36% (Table I), which is approximately the same as the 14 to 31% reported in previous studies (Cantú and Okumura, 1996b;Park et al, 2000;Toba and Ohta, 2005) in broadleaf forests in Japan. Hence, the estimated mean Ic/R in plot C tended to be smaller than in plot T o .…”