Partnerships for Reducing Landslide Risk Assessment of the National Landslide Hazards Mitigation Strategy (2004) / Chapter Skim
Currently Skimming:
4 Landslide Loss and Risk Assessment
4 Landslide Loss and Risk Assessment
Pages 51-59
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 51... ...
Undertaking risk assessments of prospective losses for failure-prone areas is an allied and equally important process. Loss and risk assessments are essential for · establishing a sound rationale for risk reduction programs based on documented economic and societal impacts; · evaluating the cost-effectiveness of proposed interventions for landslide-prone areas; · creating mechanisms for risk sharing involving the public and private sectors through insurance, special assessment districts, or other financial risk pooling; · partitioning responsibility for landslide-related cleanup, repair, and rehabilitation costs; and · understanding the noneconomic consequences of landslides events, especially to the environment (e.g., damage to critical watersheds)
|
From page 52... ...
Risk assessments can involve qualitative characterizations or more sophisticated quantitative calculations, and they can be based on scenarios describing individual events or probabilistic assessments across a series of potential events. 4.1 LOSS ASSESSMENT The need for and problems in obtaining usable assessments of economic and other impacts of disasters constitute a problem that has been recognized in a number of recent studies.
|
From page 53... ...
[~E LOSS ~~ R~K ~S=S~ENT ~3 Despite Me 1dent1Acat10n in We national strategy proposal of over entities as appropriately leading loss assessment activ1Ues' Me USES and Me Associabon of American State geologists (CASE) have already taken Me lead by est^Ushing a partnership to undertake a loss assessment pact protect (Davis ~ at.' 20037 Me USES provided Ending to Me ALSO for a trial program to determine annual losses attributable to landslides in seven states (results Tom Is pact program mere not livable at Me time
|
From page 54... ...
Figure 4.1 illustrates the role of risk assessment in guiding management of landslide risks, as presented in guidelines developed by the Australian Geomechanics Society (AGS, 2000~. Risk assessments provide informed options for risk management.
|
From page 55... ...
As emphasized in an NRC report that analyzed risk (NRC, 1996) , risk assessments can be important processes for informing relevant stakeholders about potential consequences and for gaining consensus about appropriate steps to address
|
From page 56... ...
CONSIDERED FOR ALL HAZARDS | ___ (or RISKCONTPOL) PARTNERSHIPS FOR REDUCING LANDSLIDE RISK lISK ASSESSMENT | RISK EVALUATION COMPARE TO LEVELS OF TOLERABLE OR ACCEPTABLE RISK ASSESS PRIORITIES AND OPTIONS CLIENT / OWNER / REGULATOR TO DECIDE TO ACCEPT OR TREAT TECHNICAL SPECIALISTTO ADVISE SK ANALYSIS | l CONSEQUENCE ANALYSIS FREQUENCY ANALYSIS ELEMENTS AT RISK ESTIMATE FREQUENCY PROPERTY QUALITATIVE l ROAD & COMMUNICATIONS QUANTITATIVE SERVICES l PEOPLE HISTORIC PERFORMANCE l TRAVEL DISTANCE l TEMPORAL PROBABILITY e.g., vehicles, persons RELATIVE TO INITIATING EVENTS RAINFALL l V U LN E RA B I Ll TY CONSTRUCTION ACTIVITY l RELATIVE DAMAGE EARTHQUAKE l l PPOEAE LITY OF l N.IUPY / LOSS OF LIFE | | SERVICES FAILURE / MALFUNC ON l I SCOPE DEFINITION | ESTABLISH BRIEF, PROPOSED METHODOLOGY | ~ HAZARD I DENT'FICATION l I CLASSIFICATION OF LANDSLIDE e.g., slide, debris flow, rockfall EXTENT OF LANDSLIDE e.g., slide, debris flow, rockfall TRAVEL DISTANCE OF LANDSLIDE RATE OF MOVEMENT e.g., creep, slow, fast l · 1I RISK TREATMENT 1 TREATMENT OPTIONS ACCEPT RISK AVOID RISK REDUCE LIKELIHOOD REDUCE CONSEQUENCES TRANSFER RISK TREATMENT PLAN DETAIL SELECTED OPTIONS IMPLEMENT PLAN | POLICY AND PLANNING I— l 1 it: 1 1- 1 ~ 1 1 MONITOR AND REVIEW I , FEEDBACK RISK CHANGES MORE INFORMATION FURTHER STUDIES 1 FIGURE 4.1 Schematic illustration of landslide risk assessment and risk management decision processes.
|
From page 57... ...
The committee strongly recommends that a national strategy for landslide loss reduction establish and promote the use of sound risk analysis methods for understanding landslide risks and making informed loss reduction choices. Because the state of the art of such methods is evolving, further development of landslide risk assessment methods and documentation of their use are important components of a landslide research program.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.