Abstract
A theory of the internal-response-based rainfall criterion for predicting slope failure is proposed based on artificial rainfall tests for a sandy slope. Key elements in a generic model describing shallow slope failure are identified from the tests with extensive soil moisture and piezometric measurements. The observed retrogressive slope failure was triggered by a toe failure, followed by an abrupt increase in debris discharge. The onset of the failure was preceded by a clear transition point on the soil moisture vs. time curve at the soil-bedrock interface. Both external and internal responses of slopes to rainfall can be expressed using widely adopted I-D (rainfall intensity-duration) plots. Experimental results from the tests indicate close relationships between the internal-based and external-based I-D envelopes for critical slope states. The theory of the internal-based I-D criterion proposed here will be useful for more accurate slope failure predictions.
Original language | English |
---|---|
Pages (from-to) | 326-338 |
Number of pages | 13 |
Journal | Geomorphology |
Volume | 120 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - 2010 Aug |
All Science Journal Classification (ASJC) codes
- Earth-Surface Processes