En studie på samband mellan jordmekaniska egenskaper och hydrodynamiska processer när erosion påverkar släntstabiliteten vid ökad nederbörd
Author
Summary, in English
Rivers and streams in Western Sweden are exposed to constant erosion when surface water from lakes and land discharge into the sea. The geological composition of the rivers under the highest coastline consists of glacial and postglacial fine-grained sediments deposited in marine environments. The leakage of the sensitive clay layers has become more unstable after leaching and, in the event of a disturbance, can trigger landslides. The impact of climate change is likely to increase sea levels, water levels in lakes and streams. As a support for predicting the risks of landslides and flooding in case of increased precipitation, simulations are made using various model tools. To create reliable simulations, a large amount of data needs to be collected. Some of these data are to generate values of parameters included in the calculations. This applies, for example, to what is known as the erodability coefficient and Manning's roughness in calculating critical shear stresses in the slopes and on the bottom of the river. Scandinavia and Sweden's west coast have similar geological stratigraphy than other continents in the world, such as Canada, Norway, Finland and Russia. This literature study summarizes several models and methods for analyzing the relationship between soil mechanics and hydrodynamic processes.
Department/s
Publishing year
2017
Language
Swedish
Publication/Series
Examensarbeten i geologi vid Lunds universitet
Full text
Document type
Student publication for Bachelor's degree
Topic
- Earth and Environmental Sciences
Keywords
- hydrodynamik
- erosion
- släntstabilitet
- Göta älv
- Säveån
- sensitiv lera
- skred
Report number
508
Supervisor
- Håkan Rosqvist
- Gunnel Göransson
Scientific presentation