 |
| Titel |
Determination of the rockfall source in an urban settlement area by using a rule-based fuzzy evaluation |
| VerfasserIn |
H. Aksoy, Murat Ercanoglu |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1561-8633
|
| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 6, no. 6 ; Nr. 6, no. 6 (2006-10-27), S.941-954 |
| Datensatznummer |
250003805
|
| Publikation (Nr.) |
 copernicus.org/nhess-6-941-2006.pdf |
|
|
|
|
|
| Zusammenfassung |
| The evaluation of the rockfall initiation mechanism and the simulation of
the runout behavior is an important issue in the prevention and remedial
measures for potential rockfall hazards in highway protection, in forest
preservation, and especially in urban settlement areas. In most of the
studies in the literature, the extent of the rockfall hazard was determined
by various techniques basing on the selection of a rockfall source,
generally defined as zones of rock bodies having slope angles higher than a
certain value, proposed by general practice. In the present study, it was
aimed to carry out a rule-based fuzzy analysis on the discontinuity data of
andesites in the city of Ankara, Turkey, in order to bring a different and
rather systematic approach to determine the source areas for rockfall hazard
in an urban settlement, based on the discontinuity and natural slope
features. First, to obtain rock source areas (RSAs), data obtained from the
field studies were combined with a rule-based fuzzy evaluation,
incorporating the altitude difference, the number of discontinuities, the
number of wedges and the number of potential slides as the parameters of the
fuzzy sets. After processing the outputs of the rule-based fuzzy system and
producing the linguistic definitions, it could be possible to obtain
potential RSAs. According to the RSA maps, 1.7% of the study area was
found to have "high RSA", and 5.8% of the study area was assigned as
"medium RSA". Then, potential rockfall hazard map was prepared. At the
final stage, based upon the high and medium RSAs, 3.6% of the study area
showed "high rockfall potential", while areal distribution of "medium
rockfall potential" was found as 7.9%. Both RSA and potential rockfall
hazard map were in accordance with the observations performed in the field. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|