期刊
ADVANCES IN WATER RESOURCES
卷 34, 期 12, 页码 1643-1655出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.advwatres.2011.08.011
关键词
River morphodynamics; Lumped models; Aggradation; Hydrological changes; River damming
资金
- Regione Piemonte
- CRC (Cassa di Risparmio di Cuneo) Foundation
- CRT (Cassa di Risparmio di Torino) Foundation
- Italian Ministry of the University
Hydrologic changes have a great impact on the long-term river morphology. The most common anthropic cause is the construction of dams, which often reduces both the discharge regime and sediment transport, producing a narrowing and degradation of the river bed. In this study we propose a simple, lumped morphodynamic model that describes fluvial cross-section dynamics consequent to changes in discharge and sediment transport induced by external factors. The model provides the temporal dynamics of the river width and bed quote. These dynamics result not to be trivial and can exhibit non monotonic behavior, with aggradations and degradations, and narrowing and widening. The model has been tested on real rivers using data obtained from field studies. The agreement between the outcomes and the data measured in the field works is always satisfactory. (C) 2011 Elsevier Ltd. All rights reserved.
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