Loading...
Citations
Altmetric:
Date
1998-09-01
Collections
Files
Loading...
eopr-4102.pdf
Adobe PDF, 228.52 KB
Research Projects
Organizational Units
Journal Issue
Citation
Diamond, J., Shanley, T., Infiltration rate assessment of some major soils, End of Project Reports, Teagasc, 1998.
Abstract
Landspreading of fertilisers and wastes require an evaluation of the
risk of overland flow in order to minimise risks of polluting rivers and
lakes. Infiltration capacity measurements offer a practical means of
indexing runoff risk. The objectives of this study were to assess the
spatial and temporal variability of infiltration capacity and to assess
the capacity of some major Irish soils.
Infiltration capacity was measured using double ring infiltrometers at
freely drained (8) imperfectly drained (1) and poorly drained (1) sites.
The first series was performed for one day in summer. Eight years
later a second series was conducted for two days in winter and summer
at the same sites. On average six replicates were required in summer
and fourteen in winter to estimate the mean with 50 percent precision.
Capacities were reasonably stable between years but there was
a significant difference between seasons. Capacities in summer were
about 3.5 times the winter values. Except on the poorly drained soil
the infiltration capacity exceeded or equalled the five year return rainfall
rate indicating a very small risk of overland flow in summer. In
winter the capacity at three sites, including freely drained sites, were
less than 2.5 mm hr-1 indicating a significant general risk in winter.