Once enough water has accumulated in the colluvium
, slope movement is dependent on the amount of precipitation received from the next storm (Pomeroy 1984).
We interpret the sediments as either colluvium
or vertically-accreted fluvial sediments.
Field observations indicate significant colluvium
storage in this region.
Note that the RUSLE model cannot be used to estimate intrabasinal sediment storage as colluvium
Second, comparing A1D and A1U, the data confirm field observations that the pit section at the latter consisted of colluvium
rather than marine sediment.
In both areas seismic motion occurred along basin-bounding faults bringing in contact Mesozoic limestone and alluvial deposits as well as colluvium
Only 8 of the 95 soil series have underlying materials consisting of residuum, colluvium
, or alluvium.
The column of loess, colluvium
, and alluvium provides a medium for relatively continuous storage and flux of water that supports perennial baseflow to streams.
All soils on this catena contain only quartz in both the silt and fine sand fractions due to the parent materials of this catena being colluvium
derived from sandstone for the soil on the summit, shoulder, midslope and footslope positions.
In Bollinne's (1982) original study of erosion rates in central Belgium, he uses four methods: measurement of rills on four fields over one winter; a six-year experimental study using 12 plots; measurement of the thickness of colluvium
in dry valley bottoms; and measurement of colluvium
in three enclosed hollows.
All Oxisols have developed on mixed colluvium
and residuum (Table 1).
In small drainage basins, colluvium
, channel-bank collapse, and erosion, may contribute to the sediment in transit, or depositional processes may place sediment in storage for time periods ranging from hours to millennia.