PREDIKSI JARAK LUNCUR LONGSOR BERDASARKAN MEKANISME DAN PENYEBAB GERAKAN MASSA TANAH ATAU BATUAN
Landslide often occurs in tropical hills area such as Indonesia. Research on landslide hazard evaluation is necessary to decrease the impact in affected and surrounding areas. Empirical-statistical methods can be used to predict landslide runout distance in an effort to avoid the danger of landslide...
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| Main Authors: | , |
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| Format: | Theses and Dissertations NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2014
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| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/134042/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=75014 |
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| Summary: | Landslide often occurs in tropical hills area such as Indonesia. Research on
landslide hazard evaluation is necessary to decrease the impact in affected and
surrounding areas. Empirical-statistical methods can be used to predict landslide
runout distance in an effort to avoid the danger of landslide occurrences.
This study aims to determine the relationship between landslide runout distance
against high, slope, and volume based on mechanisms and causes of soil or rock
mass movement. Data mainly from 106 landslides in Indonesia has been analyzed
to search for possible correlations and empirical relationships, there are 34
rotational slides, 54 translational slides, 8 debris flows, and 10 rockfalls. Analysis
begins by studying the characteristics of the data (explanatory data analysis) and
then analyzed by using empirical methods such as geomorphological assessement
and geometrical approaches. Then the data is processed by simple linear regression
and multiple linear regression method using the R software.
The results obtained from the analysis of the general empirical equation form of the
relationship between height (H) and runout distance (L) is L=1,047 H1,09. This
results indicate the higher altitude slopes, the greater distance will happens. The
results of the analysis relationship between height and runout distance for the type
of mass movements for rotational is L=1,346+1,788 H, translational is
L = -3,88 + 1,578 H, debris flow is L = 0,682 H1,29, and rockfall is L = 2,223 H0,897.
This result shows debris flows landslide runout distance greater than rotational,
translational and rockfall. The results of the analysis relationship between height
and runout distance of the trigger due to the rain is L = 1,267 H1,027, and by an
earthquake is L = 0,574 H1,38. This results show the effect of runout distance caused
by an earthquake larger than the effect due to the rain. The relationship between the
runout distance and volume (V) obtained empirical equation is V=0,772 L2,108. This
results indicate the greater runout distance occurs is affected by the growing volume
of mass movement. The results of the analysis relationship between height and
slope (θ) to runout distance is L = 1,448 H1,062 tan θ-0,482. This results indicate slope
have a significant impact on the value of landslide runout distance. |
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