TITLE

Regional scale analysis of the altimetric stream network evolution

AUTHOR(S)
Ghizzoni, T.; Lomazzi, M.; Roth, G.; Rudari, R.
PUB. DATE
June 2006
SOURCE
Advances in Geosciences;2006, Vol. 7, p79
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Floods result from the limited carrying capacity of stream channels when compared to the discharge peak value. The transit of flood waves -- with the associated erosion and sedimentation processes -- often modifies local stream geometry. In some cases this results in a reduction of the stream carrying capacity, and consequently in an enhancement of the flooding risk. A mathematical model for the prediction of potential altimetric stream network evolution due to erosion and sedimentation processes is here formalized. It works at the regional scale, identifying the tendency of river segments to sedimentation, stability, or erosion. The model builds on geomorphologic concepts, and derives its parameters from extensive surveys. As a case study, tendencies of rivers pertaining to the Valle d'Aosta region are analyzed. Some validation is provided both at regional and local scales of analysis. Local validation is performed both through a mathematical model able to simulate the temporal evolution of the stream profile, and through comparison of the prediction with ante and post-event river surveys, where available. Overall results are strongly encouraging. Possible use of the information derived from the model in the context of flood and landslide hazard mitigation is briefly discussed.
ACCESSION #
22066593

 

Related Articles

  • Origin of Appalachian Geomorphology Part III: Channelized Erosion Late in the Flood. Oard, Michael J. // Creation Research Society Quarterly;Spring2012, Vol. 48 Issue 4, p329 

    Water and wind gaps are transverse erosional cuts through higher elevations. These features are abundant in the Appalachian Mountains, and several of them are briefly described. What they all have in common is the inability of actualists to offer a viable hypothesis for their formation. The...

  • MORPHOLOGICAL EFFECT OF FLOOD WATER PATHWAY IN RESERVOIRS ON THE DISTRIBUTION OF SEDIMENTATION. Ines, Nsiri; Jamila, Tarhouni; Mitsuteru, Irie; Hassen, Ben Ali // Journal of Urban & Environmental Engineering;2014, Vol. 8 Issue 2, p192 

    In the North Africa countries, sediments deposition in the reservoir dams reduces the available surface water resources by 2 to 5% per year. In Tunisia, even many efforts are made to protect reservoir dams against soil erosion, the sedimentation still very important and constitute a limitation...

  • On the geo-basis of river regulation in the lower reaches of the Yellow River. Liu, GuoWei // SCIENCE CHINA Earth Sciences;Apr2012, Vol. 55 Issue 4, p530 

    This paper investigates the important scientific problem of river regulation strategies in the lower reaches of the Yellow River, and discusses the 'geo-basis' of river regulation. The concept of a geo-basis to river regulation in the lower Yellow River was discussed in terms of subsidence and...

  • Rehabilitation of an Incised Stream Using Plant Materials: the Dominance of Geomorphic Processes. Shields, F. Douglas; Pezeshki, S. Reza; Wilson, Glen V.; Wu, Weiming; Dabney, Seth M. // Ecology & Society;2008, Vol. 13 Issue 2, p1 

    The restoration of potentially species-rich stream ecosystems in physically unstable environments is challenging, and few attempts have been evaluated scientifically. Restoration approaches that involve living and dead native vegetation are attractive economically and from an ecological...

  • Recent changes in sediment redistribution in the upper parts of the fluvial system of European Russia: regional aspects. YERMOLAEV, O. P.; GOLOSOV, V. N.; KUMANI, M. V.; LITVIN, L. F.; RYSIN, I. I.; DVINSKIKH, A. P. // Proceedings of the International Association of Hydrological Sci;2015, Vol. 367, p333 

    Quantitative assessments of soil loss from cultivated land and sediment redistribution along pathways from cultivated fields to river channels have been undertaken using a range of different methods and techniques, including erosion models, detailed studies of sediment redistribution in...

  • The Channeled Scabland: Back to Bretz? Shaw, John; Munro-Stasiuk, Mandy // Geology;Jul99, Vol. 27 Issue 7, p605 

    Analyzes the geomorphic and sedimentary evidence on the formation of Channeled Scabland of Washington state. Effect of the erosion by drainage of glacial lake Missoula; Other sources of meltwater; Sedimentation of the lake.

  • A Geomorphic Explanation for a Meander Cutoff Following Channel Relocation of a Coarse-Bedded River. Thompson, Douglas M. // Environmental Management;Mar2003, Vol. 31 Issue 3, p0385 

    The Veteran's Fishing section of the Blackledge River in central Connecticut was relocated in the late 1950s. The relocation resulted in an unstable channel despite extensive efforts to prevent erosion. Overbank erosion and meander cutoffs were investigated using detailed survey data,...

  • Factors Influencing Bank Geomorphology and Erosion of the Haw River, a High Order River in North Carolina, since European Settlement. Macfall, Janet; Robinette, Paul; Welch, David // PLoS ONE;Oct2014, Vol. 9 Issue 10, p1 

    The Haw River, a high order river in the southeastern United States, is characterized by severe bank erosion and geomorphic change from historical conditions of clear waters and connected floodplains. In 2014 it was named one of the 10 most threatened rivers in the United States by American...

  • The river Ganga of northern India: an appraisal of its geomorphic and ecological changes. Sarkar, S. K.; Bhattacharya, A.; Bhattacharya, B. // Water Science & Technology;2003, Vol. 48 Issue 7, p121 

    The Ganga is the most important perennial river originating from Gangotri in the snow-bound Himalayas about 3,900 m above mean sea level. Gorging a distance of about 220 km in the Himalayas, it enters the plain at Hardwar and after meandering and braiding over a distance of about 2,525 km...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics