Significant variability characterizes natural streams in space and time that describe hydraulic regime of the entire stream. In this paper, the importance of investigation and assessment of hydraulic system in the context of management of surface water resources is discussed. The objective of this study is to investigate hydraulic regime in the middle part of Loire River located in France. Loire River basin is the largest river basin in France and origin of many potential flood events. Investigation of a hydraulic regime of the Loire River is conducted using traditional hydraulic simulation model HEC-RAS. Hydraulic modeling of the river is carried out by considering two different datasets (i.e. flood and low flow events). A certain number of hydraulic structures, which have the significant effect on the hydraulic regime of the river, is considered as well. Through Froude number computation, it is noticed that middle part of the Loire River demonstrates subcritical regime. Accurate calibration and validation of the model are performed by changing Manning coefficient along the riverbed. Computation carried out for both data sets; show that there are no big differences between observed and simulated water levels, results obtained are satisfactory. Therefore, to get more accurate information about the hydraulic regime at the middle part at of Loire River, the further simulation needs to be done by considering an additional dataset of floods and low flow events.
Poff N. L. , Allan J. D., Bain M. B., Karr J. R., Prestegaard K. L., Richter B. D., Stromberg J. C. The natural flow regime, BioScience, Vol. 47, No. 11, 1997, pp. 769–784.
Olden J. D. , Poff N. L. Redundancy and the choice of hydrologic Indices for characterizing stream flow regimes, River Research and Applications, Vol. 19, No. 2, 2003, pp. 101–121.
Sanford S. E. , Creed I. F., Tague C. L., Beall F. D., Buttle J. M. Scale-dependence of natural variability of flow regimes in a forested landscape, Water Resources Research, Vol. 43, No. 8, 2007, pp. 1–15.
De Doncker L. , Troch P., Verhoeven R., Bal K., Meire P., Quintelier J. Determination of the Manning roughness coefficient influenced by vegetation in the river Aa and Biebrza river, Environmental Fluid Mechanics, Vol. 9, No. 5, 2009, pp. 549–567.
Kelčík S. , Pindjakova T., Šoltész A. Assessment and design of the flood protection measures in the district of Levice (Slovakia), Pollack Periodica, Vol. 11, No. 1, 2016, pp. 35–41.
Pindjakova T. , Kelčík S., Šoltész A. Simulation of flood progress on the River Gidra, Pollack Periodica, Vol. 11, No. 1, 2016, pp. 25–34.
Moncoulon D. , Labat D., Ardon J., Leblois E., Onfroy T., Poulard C., Quantin A. Analysis of the French insurance market exposure to floods: A stochastic model combining river overflow and surface runoff, Natural Hazards and Earth System Sciences, Vol. 14, No. 9, 2014, pp. 2469–2485.
Selenica A. , Kuriqi A., Ardicioglu M. Risk assessment from flooding’s in the rivers of Albania, 1st International Balkans Conference on Challenges of Civil Engineering, Tirana, Albania, 5-9 May 2011, pp. 45–51.
Grover P. , Naumov A., Khayer Y. Comparison of 1D and 2D models for dam break flow: Simulations for two different river systems, Trades Union Congress, Bournemouth, England, 1-11 September 2013, pp. 47–52.
Prastacos P. , Prinet V. ANFAS: a decision support system for simulating river floods, Proceedings of the 7th AGILE Conference on Geographic Information Science, Heraklion, Greece, 28-29 April 2004, pp. 63-72.
Spada E. , Sinagra M., Tucciarelli T., Biondi D. Unsteady state water level analysis for discharge hydrograph estimation in rivers with Torrential Regime: The case study of the February 2016 flood event in the Crati River, South Italy, Water, Vol. 9, No. 4, 2017, pp. 1–15.
Siegle E. , Schettini C. A., Klein A. H., Toldo Jr E. E. Hydrodynamics and suspended sediment transport in the Camboriú estuary - Brazil: pre jetty conditions, Brazilian Journal Oceanography, Vol. 57, No. 2, 2009, pp. 12–135.
Dos Santos P. P. , Tavares A. O. Basin flood risk management: a territorial data-driven approach to support decision-making, Water, Vol. 7, No. 2, 2015, pp. 480–502.
Middelkoop H. , Daamen K., Gellens D., Grabs W., Kwadijk J. C., Lang H., Wilke K. Impact of climate change on hydrological regimes and water resources management in the Rhine Basin, Climatic Change, Vol. 49, No. 1-2, 2001, pp. 105–128.
Latapie A. , Camenena B., Rodrigues S., Paquier A., Bouchard J. P., Moatar F. Assessing channel response of a long river influenced by human disturbance, Catena, Vol. 121, 2014, pp. 1–12.
Kuriqi A. , Ardiçlioglu M., Muceku Y. Investigation of seepage effect on river dike’s stability under steady state and transient conditions, Pollack Periodica, Vol. 11, No. 2, 2016, pp. 87–104.
Du S. , Gu H., Wen J., Chen K., Van Rompaey A. Detecting flood variations in Shanghai over 1949–2009 with Mann-Kendall tests and a newspaper-based database, Water, Vol. 7, No. 5, 2015, pp. 1808–1824.
Magnier B. , Claude N., Villaret C., Rodrigues S., Tassi P. Numerical simulation of flow structures in the presence of alternate and transverse bars: Application to the Loire River (France), Trades Union Congress, Bournemouth, England, 1-11 September 2013, pp. 16–31.
Gourry J. C. , Vermeersch F., Garcin M., Giot D. Contribution of geophysics to the study of Alluvial Deposits: A case study in the Val d'Avaray area of the River Loire, France, Journal of Applied Geophysics, Vol. 54, No. 1-2, 2003, pp. 35–49.
Coeur D. , Djerboua A. The 1856 flood: Reconstruction and analysis of a reference hydrological event, La Houille Blanche, International Water Journal, No. 2, 2007, pp. 27–37.
Bourgin F. Calibration of a catchment-based land surface model in the Loire River basin (France) to assess hydrological impacts of climate change, Master Thesis, Environmental Engineering, Technische Universitat Munchen, 2009.
Heimhuber V. , Hannemann J. C., Rieger W. Flood risk management in remote and impoverished areas - a case study of Onaville, Haiti, Water, Vol. 7, No. 7, 2015, pp. 3832–3860.
Poff N. L. , Olden J. D., Pepin D. M., Bledsoe B. P. Placing global stream flow variability in geographic and geomorphic contexts, River Research and Applications, Vol. 22, No. 2, 2006, pp. 149–166.
Moulin L. , Gaume E., Obled C. Uncertainties on mean areal precipitation: Assessment and impact on stream flow simulations, Hydrology and Earth System Sciences, Vol. 2, No. 13, 2009, pp. 99–114.
Timbadiya P. V. , Patel P. L., Porey P. D. Calibration of HEC-RAS model on the prediction of flood for lower Tapi River, India, Journal of Water Resource and Protection, Vol. 3, No. 11, 2011, pp. 805–811.
Moussa R. , Bocquillon C. Criteria for the choice of flood-routing methods in natural channels, Journal of Hydrology, Vol. 186, No. 1-4, 2004, pp. 1–30.
Ardiclioglu M. , Selenica A., Ozdin S., Kuriqi A., Genç O. Investigation of average shear stress in natural stream, 1st International Balkans Conference on Challenges of Civil Engineering, Tirana, Albania, 5-9 May 2011, pp. 8–16.
Timbadiya P. V. , Patel P. L., Porey P. D. Calibration of HEC-RAS Model on the prediction of flood for lower Tapi River, India, Journal of Water Resource and Protection, Vol. 3, No. 11, 2011, pp. 805–811.
Gaume E. , Livet M., Desbordes M., Villeneuve J. P. Hydrological analysis of the river Aude, France, a flash flood on 12 and 13 November 1999, Journal of Hydrology, Vol. 286, No. 1, 2004, pp. 135–154.
Mohammadi S. , Kashefipour S. M. Numerical modeling of flow in riverine basins using an improved dynamic roughness coefficient, Water Resources, Vol. 41, No. 4, 2014, pp. 412–420.
Miyab N. M. , Afzalimehr H., Singh V. P., Ghorbani B. On flow resistance due to vegetation in a Gravel-Bed River, International Journal of Hydraulic Engineering, Vol. 3, No. 3, 2014, pp. 85–92.
Yang Z. , Wang T., Khangaonkar T., & Breithaupt S. Integrated modeling of flood flows and tidal hydrodynamics over a coastal floodplain, Environmental Fluid Mechanics, Vol. 12, No. 1, 2012, pp. 63–80.
Grant G. E. Critical flow constrains flow hydraulics in mobile-bed streams: A new hypothesis, Water Resources Research, Vol. 33, No. 2, 1997, pp. 349–358.
Saltzer R. L. , Humphreys E. D. Upper mantle P wave velocity structure of the eastern Snake River Plain and its relationship to geodynamic models of the region, Journal of Geophysical Research, Vol. 102, No. B6, 1997, pp. 11829–11841.