A GRASS GIS application for vertical sorting of sediments analysis in River Dynamics

Authors

  • Annalisa Minelli Università degli Studi di Perugia – Dipartimento di Ingegneria Civile e Ambientale Via G. Duranti, 93 – 06125 Perugia (Italy)
  • Gary Parker University of Illinois at Urbana-Champaign, Department of Civil and Environmental Engineering, Department of Geology, 205N Mathews Avenue 61801 Urbana, IL (USA)
  • Paolo Tacconi Università degli Studi di Perugia – Dipartimento di Ingegneria Civile e Ambientale Via G. Duranti, 93 – 06125 Perugia (Italy)
  • Corrado Cencetti Università degli Studi di Perugia – Dipartimento di Ingegneria Civile e Ambientale Via G. Duranti, 93 – 06125 Perugia (Italy)

DOI:

https://doi.org/10.14311/gi.7.4

Keywords:

GRASS, geomorphology, river dynamics

Abstract

The extreme versatility in different research fields of GRASS GIS is well known. A tool for the vertical sorting of sediments in river dynamics analysis is illustrated in this work. In particular, a GRASS GIS python module has been written which implements a forecasting sorting model by Blom&Parker (2006) to analyze river bed composition’s evolution in depth in terms of grainsize. The module takes a DEM and information relative to the bed load transport composition as input. It works in two different and consecutive phases: the first one uses the GRASS capabilities in analyzing geometrical features of the river bed along a chosen river reach, the second phase is the "numerical" one and implements the forecasting model itself, then executes statistical analyses and draws graphs, by the means of matplotlib library. Moreover, a specific procedure for the import of a laser scanner cloud of points is implemented, in case the raster DEM map is not available. At the moment, the module has been applied using flumes data from Saint Anthony Falls Laboratory (Minneapolis, MN) and some first results have been obtained, but the "testing" phase on other flume’s data is still in progress. Moreover the module has been written for GRASS 65 on a Ubuntu Linux machine, even if the debugging of a GRASS 64, Windowsversion, is also in progress. The final aim of this work is the application of the model on natural rivers, but there are still some drawbacks. First of all the need of a high resolution DEM in input, secondly the number and type of data in input (for example the bed load composition in volume fraction per each size considered) which is not easily obtainable, so the best solution is represented by testing the model on a well instrumented river reach to export in future the forecasting method to un-instrumented reaches.

References

Ganti, V., M. Meerschaert, E. Foufoula-Georgiou, E. Viparelli, and G. Parker, Normal and anomalous dispersion of gravel tracer particles in rivers, J. Geophys. Res. – Earth Surface, 115, F00A12, doi:10.1029/2008JF001222, 2010

Hirano, M. (1971), River bed degradation with armouring. Transactions Jap. Soc. Civ. Eng., 3(2), 194-195.

Bagnold, R. A. (1977), Bed load transport by natural rivers, Water Resour. Res., 13(2), 303–312, doi:10.1029/WR013i002p00303.

Wilcock, P. R., and J. B. Southard (1989), Bed load transport of mixed size sediment: Fractional transport rates, bed forms, and the development of a coarse bed surface layer, Water Resour. Res., 25(7), 1629–1641, doi:10.1029/WR025i007p01629.

Blom, A. and G. Parker (2004), Vertical Sorting and the morphodynamics of bed formdominated rivers: a modeling framework. Journal of Geophysical Research, 109.

Viparelli, E., Hydel, R., Salvaro, M., Wilcock, P. R. and G. Parker (2010)a, River morphodynamics with creation/consumption of grain size stratigraphy 1: laboratory experiments, Journal of Hydraulic Research, Vol. 48, No. 6. (2010), pp. 715-726. doi:10.1080/00221686.2010.515383

Viparelli, E., Sequeiros O. E., Cantelli A., Wilcock, P. R. and G. Parker (2010)b, River morphodynamics with creation/consumption of grain size stratigraphy 2: numerical model, Journal of Hydraulic Research, Vol. 48, No. 6. (2010), pp. 727-741. doi:10.1080/00221686.2010.526759

Blom, A., Parker, G., Ribberink, J.S. and H.J. de Vriend (2006), Vertical Sorting and the morphodynamics of bed form-dominated rivers: an equilibrium sorting model. Journal of Geophysical Research, 111.

Neteler, M. and H. Mitášová (2007), Open Source GIS: A GRASS GIS Approach, Kluwer Academic Publishers Group, ISBN 1-4020-7088-8

Marr, J. D. G., Gray, J. R., Davis, B. E., Ellis, C. and S. Johnson (2010), Large-Scale Laboratory Testing of Bedload-Monitoring Technologies: Overview of the StreamLab06 Experiments. U.S. Geological Survey Scientific Investigations Report 2010-5091, (p. 266-282; 910 KB)

Blom, A., Parker, G., Ribberink, J.S. and H.J. de Vriend (2006), Vertical Sorting and the morphodynamics of bed form-dominated rivers: an equilibrium sorting model. Journal of Geophysical Research, 111.

Blom, A. and G. Parker (2004), Vertical Sorting and the morphodynamics of bed formdominated rivers: a modeling framework. Journal of Geophysical Research, 109.

Parker, G., Paola, C. and S. Leclair (2000), Probabilistic Exner Sediment Continuity Equation for Mixtures with No Active Layer. Journal of Hydraulic Engineering, 818.

Dinehart, R. L. (1989), Dune migration in a steep, coarse-bedded stream, Water Resour. Res., 25(5), 911–923, doi:10.1029/WR025i005p00911.

Singh, A., K. Fienberg, D. J. Jerolmack, J. Marr, and E. Foufoula-Georgiou, Experimental evidence for statistical scaling and intermittency in sediment transport rates, J. Geophys. Res., 114, F01025, doi:10.1029/2007JF000963, 2009.

Singh, A., Porté-Agel, F., and E. Foufoula-Georgiou, On the influence of gravel bed dynamics on velocity power spectra, Water Resour. Res., 46, W04509, doi:10.1029/2009WR008190, 2010.

van der Mark, C. F., A. Blom, and S. J. M. H. Hulscher (2008), Quantification of variability in bedform geometry,J. Geophys. Res., 113, F03020, doi:10.1029/2007JF000940.

Blom, A. (2008), Different approaches to handling vertical and streamwise sorting in modeling river morphodynamics, Water Resour. Res., 44, W03415, doi:10.1029/2006WR005474.

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Published

2011-12-29

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