Abstract:
During ponded infiltration, air present in the soil ahead of the wetting front is trapped within the soil profile. As infiltration continues, this trapped air becomes compressed, thus increasing the gas pressure potential which reduces the hydraulic gradient the primary driving force. The net result is a reduction in the infiltration rate and increased runoff. When the soil air is vented at atmospheric pressure, the infiltration rate increases resulting in decreased runoff. When trapped and compressed soil air escapes to the atmosphere at the soil surface, energy is released which is available to detach soil particles in the wetting front making Them available for transport by flowing water. The purpose of this study was to determine the impact of soil-air entrapment on soil detachment and transport.
Page(s):
133-143
DOI:
DOI not available
Published:
Journal: Journal of Engineering and Applied Sciences, Volume: 1, Issue: 1, Year: 1982