Problems to be solved
Debris flows and rock falls are a familiar hazard in European mountain areas and regularly cause loss of life, life hood and property. Hazard assessment is therefore increasingly required in land use planning. However, there are no standard techniques and existing techniques are qualitative. This project will apply advanced physically based and its modelling technologies to the quantitative assessment of debris flow and rock fall hazard and disseminate these technologies to end-users. Scientific objectives and approach The project integrates research-based model development with the involvement of local planning and civil protection authorities as data suppliers, advisors and recipients of the recipients of the project results. The aim is to:
- develop and apply three advanced models for hazard assessment, impact prediction and mitigation studies relevant at local scales:
a) a GIS debris flow and rock fall hazard assessment model;
b) a small basin (<10 km²) debris flow impact model; and
c) a basin scale (<500km²) landslide erosion and sediment yield model.
The last two models will be integrated with the first one;
- to conduct field surveys and assemble databases in support of model development for one region in the Pyrenees and two in the Alps;
- to identify debris flow process relationships for insertion in the models and to transfer the technologies to end-users.
Improved means will be developed for predicting debris flow occurrence and magnitude as a function of land use change and rainfall return period. An innovative user-friendly debris flow impact model, as well as, new guidelines on basin management will be developed. Dissemination of the project results will be achieved by training courses, workshops, the direct involvement of six end-users in model application and the placement of relevant deliverables on a web site. Expected impacts This project will improve the efficiency and reliability of decision-making in the development of European mountain regions through improved hazard mapping and debris flow impact prediction. It will also contribute to more efficient environmental quality and impact assessment and management of land use.
The following deliverables were provided by the project:
1) Reports on debris flow relationships (e.g. runout distance) and database;
2) Report on landslide hazard mapping procedure. Details of procedures and final maps transferred to end-user (Lombardy Region Geological Survey);
3) A 5 m x 5 m DEM for the Valsassina focus area (Lombardy pre-Alps), a landslide inventory for Valsassina and thematic maps;
4) The multivariate statistical technique for regional scale landslide hazard assessment and the rockfall modelling methodology, together with results, transferred to end-user (Lombardy Region Geological Survey);
5) Report reviewing rockfall and granular flow models;
6) Database on debris flows for the small basin debris flow impact model;
7) Report and CD on the small basin debris flow impact model;
8) CD of basin scale debris flow impact scenario simulations for the Valsassina and Ijuez (Central Spanish Pyrenees) focus basins (for land use and climate scenarios);
9) CD of electronic matrices comparing the Valsassina and Ijuez scenario simulations as basis for guidelines for basin management;
10) End-users trained in the project technologies (e.g. by training courses);
11) Project technologies put in the public domain by training courses, workshops, CDs of scenario results, website and published papers;
12) Proposal for standard approach to hazard zonation acieved with deliverable (4) and training of end-users.
Funding SchemeCSC - Cost-sharing contracts