Comparative study of bedload sediment yield processes in small mountainous catchments covered by secondary and disturbed forests, western Japan

Nishimune, Naoyuki; Onodera, Satoshi; Naruoka, Tomohiro; Birmano, Moch. Djoko

doi:10.1023/a:1025491005408

Cited by 9 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Alvera and García-Ruiz (2000) reported bed load yields in a high mountain catchment in the Central Spain Pyrenees ranging from 0-0.76 t/ha/yr. Nishimune et al (2003) reported bed load yields after a forest fire in Hiroshima, Japan with ranges from 0.01-0.18 t/ha/yr.…”

Section: Bed Load Yields and Materials In A Headwater Catchmentmentioning

confidence: 99%

Responses of bed load yields from a forested headwater catchment in the eastern Tanzawa Mountains, Japan

Hiraoka

Gomi

Oda

et al. 2015

Hydrological Research Letters

View full text Add to dashboard Cite

We investigated bed load yields from a headwater catchment (7.0 ha) in the eastern Tanzawa Mountains in Kanagawa Prefecture, Japan from 2009-2014 using measurements from a weir pond in the catchment. Precipitation and stream discharge were continuously monitored at 10-min intervals. The mean (± standard deviation) volume of transported bed load was 0.019 ± 0.040 m 3 /ha/day (0.023 ± 0.049 t/ha/day by yield) and zero bed load events were observed during the monitoring period. The particle size of the bed load sediment tended to be small compared to that of sediment in the stream bed. Bed load yields in summer-autumn were 5.7-fold those during winter-spring. A significant correlation was detected between bed load yield and peak discharge (p < 0.05). Variations in the availability of sediment induced discontinuous sediment transport during major precipitation events. These intermittent responses of the bed load yield were associated with the available sediment and transport capacity in the stream channel. Our findings help for clarifying sediment flux in a headwater channel based on its potential storage and yields.

show abstract

Section: Bed Load Yields and Materials In A Headwater Catchmentmentioning

confidence: 99%

Responses of bed load yields from a forested headwater catchment in the eastern Tanzawa Mountains, Japan

Hiraoka

Gomi

Oda

et al. 2015

Hydrological Research Letters

View full text Add to dashboard Cite

show abstract

“…For example, slope aspect may influence the amount of burnt plant debris and the rate of vegetation recovery (Marqués and Mora, 1992) together with the rate of drying out of soil, which in turn can affect its repellency characteristics (Dekker et al, 2001;Pierson et al, 2002) and the amount of soil lost (Andreu et al, 2001). Long-term redistribution of soil cover within a catchment through repeated fire-induced soil erosion events can also affect catchment sediment yields (Nishimune et al, 2003). Long-term redistribution of soil cover within a catchment through repeated fire-induced soil erosion events can also affect catchment sediment yields (Nishimune et al, 2003).…”

Section: Soil Erosion By Watermentioning

confidence: 99%

Fire and the Land Surface

Doerr

Shakesby

2013

Fire Phenomena and the Earth System

View full text Add to dashboard Cite

Surface runoff as affected by soil water repellency in a Japanese cypress forest

Miyata

Kosugi

Gomi

et al. 2007

Hydrological Processes

View full text Add to dashboard Cite

Abstract:Recent studies have suggested that soil water repellency can be one of the important factors affecting hydrological processes on headwater catchments. In Japan, water repellency is known to occur under Japanese cypress (Chamaecyparis obtusa) forests, a typical plantation type in Japan, however, previous studies have not evaluated the severity of water repellency and its effects on surface runoff generation. To quantify water repellency and its effects, this study combined the critical surface tension (CST) test with a new spraying experiment in which the infiltration rates of water and ethanol solutions sprayed over 0Ð09-m 2 plots were compared. Long-term intensive hydrological observations of surface runoff from 2-m 2 plots, soil water potential, and soil water content were conducted concurrently.The spraying experiment revealed that strong water repellency in surface soils, as quantified by the CST test, caused Hortonian overland flow despite the high conductivity measured under saturated hydrophilic conditions. Generally, the surface runoff coefficient for a storm event was negatively correlated with initial soil moisture conditions. However, during a period of successive storm events separated by short intervals, the coefficient decreased gradually even when the initial moisture conditions were similar, indicating a weakening of water repellency by repeated wetting. On the other hand, a drying period with long inter-rainfall intervals and increasing air temperature was associated with increases in the surface runoff coefficient. These results suggest that the water repellency and the resultant surface runoff depended on the history of rainfall at the site. Relationships between soil water potential and soil water content indicate that changes in the soil water repellency and consequently surface runoff coefficient could occur during a single storm event.

show abstract

Comparative study of bedload sediment yield processes in small mountainous catchments covered by secondary and disturbed forests, western Japan

Cited by 9 publications

References 0 publications

Responses of bed load yields from a forested headwater catchment in the eastern Tanzawa Mountains, Japan

Responses of bed load yields from a forested headwater catchment in the eastern Tanzawa Mountains, Japan

Fire and the Land Surface

Surface runoff as affected by soil water repellency in a Japanese cypress forest

Contact Info

Product

Resources

About