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Typus
Verschleierung
Bearbeiter
Graf Isolan
Gesichtet
No.png
Untersuchte Arbeit:
Seite: 37, Zeilen: 3-11
Quelle: Soeters and van Westen 1996
Seite(n): 132, 134, Zeilen: 132:right col. 49-50; 134:left col. 1-2.5-19
3 Slope instability hazard zonation and GIS

3.1 Overview and definitions

A great deal of research concerning slope instability hazard has been done over last four decades. Initially the investigations were oriented mainly towards solving problems at particular sites. Therefore, most researches emphasized site specific investigation techniques and the development of deterministic and probabilistic models. However, the heterogeneity of the natural environment and the large variability in geotechnical properties at the regional scale are in sharp contrast to the homogeneity required by deterministic models. This contrast, coupled with the costly and time consuming site investigation techniques makes such engineering approaches inappropriate for application over large areas. Furthermore, development projects in large areas must often be assessed during an early phase of planning and decision making process.

[Page 132]

2.4 General Trends

A great deal of research concerning slope instability hazard has been done over the last 30 years.

[Page 134]

Initially the investigations were oriented mainly toward solving instability problems at particular sites. [...] Therefore, research emphasized site investigation techniques and the development of deterministic and probabilistic models. However, the heterogeneity of the natural environment at the regional scale and the large variability in geotechnical properties such as cohesion and internal friction are in sharp contrast to the homogeneity required by deterministic models. This contrast, coupled with the costly and time- consuming site investigation techniques required to obtain property values, makes the engineering approach unsuitable for application over large areas.

In engineering projects, such large areas must often be assessed during early phases of planning and decision making.

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