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FP7

FLUMEN Report Summary

Project reference: 318969
Funded under: FP7-PEOPLE

Periodic Report Summary 1 - FLUMEN (Fluvial processes and sediment dynamics of slope channel systems: Impacts of socio economic-and climate change on river system characteristics and related services)

Work package 1. General overview and state-of –the-art in erosion and fluvial processes research
The study is based on the theoretical understanding of the fluvial system. Fluvial processes refer to the interactions of fluid water and erodible materials in the channel boundary through the entrainment, transport and deposition of sediment (Makkaveev, Chalov, 1986; Knighton, 1998). Along with catchment processes, fluvial processes are the main agent of global denudation and matter movement, playing a key role in temporal changes among natural rivers. The comprehensive approach to understanding of the fluvial system is developed.

Work package 2. Links between fluvial processes, erosion, human impact and climate changes
We aim to understand fluvial processes in terms of process dynamics and triggering events, modeling capabilities, forecasting and monitoring. Channel evolution is determined by the stream size (water runoff), sediment load (suspended and bed load), valley confinement (geologic and geomorphologic factors), slope, bed material and many local factors – ice events, riparian vegetation and woody debris, stream communities. These factors could be divided into input information (water flow and sediment load) and boundary conditions or constraints. All of them, mostly inputs, are affected by external forces, which are climate, geology and land use. Fluvial systems represent an unique combination of processes and forms expanding from hillslopes through rills and gullies to rivers. Consideration of the joint impacts of climate change through all of these constituents of the entire system emphasizes the nonlinear nature of response, and the possibly severe and synergetic effects that come from combined direct effects. Thus, changes in driving-forces affect fluvial processes. These effects can be assessed through a conceptual process-based modelling which aims integrate spatial structurs, variability and scaling effects. These assumptions determined a process-based framework for evaluating the possible changes in catchment-river system that is conceptually illustrated in Fig.1.

Work package 3. Development of complex study methodology
During the 1st year of the project the concept of Physical-Based Approach for the lumped watersheds was developed which is implemented on the case studies catchments (see work package 4).

Work package 4. Diverse studies of rivers environment
Study objects:
1. Baikal lake (Russia)
2. Selenga river (Russia, Mongolia)
3. Tarfala station (Sweden)
4. Vistula river (Poland)
5. glacial area in Northern Poland –Brda, Wda rivers
6. The Mugello Valley (Sieve river basin)/ Cinque Terre, Vernazza creek
7. Palermo, Sicily (San Leonrado/ Imera basin)
8. Kamchatka river (Sukhaya Avachinskaya River, volcanic rivers)
9. Makuyuni River Tanzania (Volcanic region soil erosion processes)
10. Zagros Mountains, Mazaijan Basin Iran
11. Dnepr River (Ukraine)

Work package 5. Series of model experiments
Model experiments are implemented for each of the sub-project 1,2, 4 (case study areas).
1. Hydro-erosive modelling
The investigation of sediment transport dynamics and sediment budgets in the study catchments with participation of the students will be performed primarily using the RUSLE based budget model SedNet (http://www.toolkit.net.au/sednet) that has already successfully been applied in similar studies. Moreover the SCS CNII methods was applied in Mugello and a first erosion processes assessment was performed using the model USPED (Mitas & Mitasova 1997)

2. GIS based Source detection combining multi-/hyper-spectral analysis
Existing Remote Sensing data from multispectral to hyperspectral Sensors of different spatial resolutions could be used to perform erosivity and landuse change studies and techniques of remote sensing applications. Moreover we utilized multispectral remote sensing analysis to derive information on surface mineral composition.

3. Hydrodynamic modelling
The one-dimensional hydraulic modelling program HEC-RAS 4.1 was used to model sediment transport patterns along river reaches. IN the sub-project 2 the modelled reach contains the Zamaar placer mining area, which is spread along a 60 km long river stretch and is regarded to be largest placer mining in the Selenga catchment. The geometry of the model was developed using measured on field cross-sections at three locations of the river as well as open-source data such as: SRTM 90 Digital Elevation Model (USGS, 2012a) and LANDSAT images (USGS, 2012b). The flow model component was calibrated by adjusting Manning’s roughness coefficients of the channel using discharge-velocity information acquired from six locations on the studied reach. Information about the bed material in the model was based on the river bed samples data measured at twelve locations along the reach.

WP 6 Communication, dissemination, networking, coordination and management
We organized sessions at conferences (EGU, Gully conference in Iasi) and did regular skype meetings where we discussed the actual situation of secondments, fieldwork activity and shifts that were necessary especially due to the situatoin in Ukraine. But also due to infrastructure availability (measurement devices, accomodation etc.).




Contact

Maerker, Michael (senior scientist)
Tel.: +39 055 3288214
E-mail
Record Number: 184194 / Last updated on: 2016-06-08
Information source: SESAM