Hydrologic Behavior of Residual Soil Slopes in Singapore
Publication: Journal of Hydrologic Engineering
Volume 8, Issue 3
Abstract
Monitoring hydrologic responses of slopes is critical for advancing hillslope hydrologic studies. Storm- and time-based continuous hydrologic responses from three instrumented hillslopes in Singapore were monitored for a period of 420 days to observe the impact of rainfall on the pore-water pressure changes and runoff generation. Analyses of the hydrologic data indicate that only about 37% of the annual rainfall events are capable of producing runoff, and a threshold rainfall of about 10 mm is required to produce runoff. The seasonal distribution of pore-water pressures showed that the slopes experience high matric suctions during dry periods that are comparable to matric suctions observed in other tropical climates, and positive pore-water pressures during wet periods, that are higher than in other geographic locations. A high correlation between the increase in pore-water pressure and the daily rainfall may provide a convenient estimate of the increase in pore-water pressure due to the daily rainfall. The variability of hillslope hydrologic responses from storm to storm is distinctive when compared with previous results at other geographic locations.
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Information & Authors
Information
Published In
Journal of Hydrologic Engineering
Volume 8 • Issue 3 • May 2003
Pages: 133 - 144
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Apr 26, 2002
Accepted: Aug 26, 2002
Published online: Apr 15, 2003
Published in print: May 2003
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