SUBSURFACE STORMFLOW FROM FORESTED SLOPES
نویسندگان
چکیده
منابع مشابه
Roots and the stability of forested slopes
Root decay after timber cutting can lead to slope failure. In situ measurements of soil with tree roots showed that soil strength increased linearly as root biomass increased. Forests clear-felled 3 years earlier contained about one-third of the root biomass of oldgrowth forests. Nearly all of the roots < 2 mm in diameter were gone from 7-year-old logged areas while about 30 percent of the < 17...
متن کاملTopographic controls on the chemistry of subsurface stormflow
Models are needed that describe how topography and other watershed characteristics affect the chemical composition of runoff waters, yet little spatially distributed data exist to develop such models. A topographically driven flushing mechanism for nitrate (NO3 ) and dissolved organic carbon has been described in recent literature; however, this mechanism has not yet been thoroughly tested. A 2...
متن کاملBase cation concentrations in subsurface flow from a forested hillslope: The role of flushing frequency
A 20-m-wide trench was excavated to bedrock on a hillslope at the Panola Mountain Research Watershed in the Piedmont region of Georgia to determine the effect of upslope drainage area from the soil and bedrock surfaces on the geochemical evolution of base cation concentrations in subsurface flow. Samples were collected from ten 2-m sections and five natural soil pipes during three winter rainst...
متن کاملVectors of subsurface stormflow in a layered hillslope during runoff initiation
The focus is the experimental assessment of insitu flow vectors in a hillslope soil. We selected a 100 m2 trenched hillslope study site. During prescribed sprinkling an obliquely installed TDR wave-guide provides for the velocity of the wetting front in its direction. A triplet of wave-guides mounted along the sides of an hypothetical tetrahedron, with its peak pointing down, produces a three-d...
متن کاملThreshold relations in subsurface stormflow : 2 . The fill and spill hypothesis
Analysis of subsurface stormflow from 147 storms at the 20 m long trench in the Panola Mountain Research Watershed by Tromp-van Meerveld and McDonnell (2006a) showed that there was a distinct 55 mm precipitation threshold for significant subsurface stormflow production. This second paper in the series investigates the processes responsible for this threshold response. We installed a dense spati...
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ژورنال
عنوان ژورنال: International Association of Scientific Hydrology. Bulletin
سال: 1965
ISSN: 0020-6024
DOI: 10.1080/02626666509493392