 |
| Titel |
Landslide Prediction Study in Malaysia |
| VerfasserIn |
Swee Peng Koay, Habibah Lateh, Satoshi Murakami, Tomofumi Koyama, Naoki Sakai, Suhaimi Jamaludin |
| Konferenz |
EGU General Assembly 2014
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250088748
|
| Publikation (Nr.) |
 EGU/EGU2014-2892.pdf |
|
|
|
|
|
| Zusammenfassung |
| In Malaysia, landslides are occurring more often than before. The Malaysian Government
allocates millions of Malaysian Ringgit for slope monitoring and slope failure measurement
in the budget every year. In rural areas, local authorities also play a major role in monitoring
the slope to prevent casualty.
However, there are thousands of slopes which are classified as dangerous slopes.
Implementing site monitoring system in these slopes, with extensometers, soil moisture
probes, inclinometers and water gauges, to monitor the movement of the soil in
the slopes and predict the occurrence of slopes failure, are too costly and almost
impossible.
Here, two snake curve methods, Accumulated Rainfall vs. Rainfall Intensity Method and
Working Rainfall vs. Rainfall Intensity Method, for the slope failure prediction are
proposed.
In Accumulated Rainfall vs. Rainfall Intensity Method, Accumulated Rainfall is defined
as RN = -
t=1Nrt, where RN is the accumulated rain from t = 1 to N , and will be reset to
0 if the rain stop period is longer than the period of water table drawdown to pre-rain level.
Rainfall Intensity is hourly rainfall.
The definition of Working Rainfall, in Working Rainfall vs. Rainfall Intensity Method, is
Rw = rt + -
n=1Nαt-n -
rt-n , where rt is the volume of rainfall in tth. hour, rt-n is the
volume of rainfall in (t –n)th. hour and r0 = 0, at-n is the reduction factor defined as
follows, αt-n = 0.5n/ T, where T is a half-life period (in hours), and N < t . If
at-n |
|
|
|
|
|
|