Abstract
The study of the hydrologic characters of a water course permits the correct management of the corresponding basin and a greater control over the water resources of the whole basin; therefore, a suitable planning and maintenance of the necessary interventions along the water course, especially in proximity of the outlet to sea, becomes necessary. An evaluation of the solid transport allows an estimation of the erosion to which the basin is subjected as a result of the river flow, and further helps to prevent hydrologic disasters in the possible risk zones. Among the various experimental techniques in use for measuring the suspended-solid transport, nuclear methods have been preferably used in this research, which are based on monitoring the concentration of the suspended sediments. The suspended-solid concentration is detected by the attenuation of radioactivity emitted by a source of 241Am dipped in the water. This attenuation, due to the presence of the sediments transported in great amounts during events of flood is measured using a scintillation detector made up of a crystal of NaI(Tl). With appropriate calibration curves built both in the laboratory and in the field, it is possible to trace the amount of suspended-solid transport in a certain river section that is located in the proximity of the river outlet. This methodology, applied to different equipped basins in Italy and Africa, is particularly useful for small and medium water courses (similar to those of the Apennine ranges in Italy), allowing an assessment of the erosion in the whole watershed. In this note, the techniques used are introduced in detail, with particular attention to the instrument calibration, and the numerical results obtained for some basins in the Marche region (Italy) are compared with some empirical formulae used in previous reports for the calculation of erosion.
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References
Ciancetti GF, Tazioli GS, Tomassoni D, Sordoni AG, Cantori PM (1998) Sul monitoraggio dei fenomeni fluviali (On the fluvial phenomena monitoring). Paper presented at the international conference on “Prevenzione Catastrofi Idrogeologiche: il contributo della Ricerca Scientifica”, Alba (CN), Italy, 5-7 November 1996
Ciancetti GF, Tazioli GS, Tomassoni D, Cantori PM (1999) Sulle variazioni dell’alveo e del regime idrologico del F. Musone causate dalla costruzione di un invaso artificiale (On the thalweg and hydrologic regime variation of Musone river, provoked by dam construction). Acque Sotterranee 64:41-49
Edwards TK, Glysson GD (1999) Field methods for measurement of fluvial sediment. In: Techniques of water-resources investigation of the U.S. Geological Survey, Chap. 2, p 89
Gavrilovic S (1959) Methode de la classification des bassins torrentiels et equations nouvelles pour le calcul des hautes eaux et du debit solide (Method for classification of stream basins and new equations for the calculation of high water flood and sediment load). Vadoprievreda, Belgrade
Gavrilovic Z (1988) The use of an empirical method (erosion potential method) for calculating sediment production and transportation in unstudied or torrential streams. Paper presented at the international conference on river regime, Institute for the Development of Water Resources, “Jaroslav Cerni”, Belgrade
Gavrilovic Z, Stefanovic M, Milojevic M, Cotric J (2006) Erosion potential method: an important support for integrated water resource management. Paper presented at the international scientific conference BALWOIS 2006—on water observation and information system for decision support, Ohrid, Republic of Macedonia, 23-26 May 2006
Gisotti G, Benedini M (2000) Il dissesto idrogeologico: previsione, prevenzione e mitigazione del rischio (Hydrogeological instability: prevision, prevention and risk mitigation). Carocci (Ed). SpA, Roma
I.A.E.A. (2005) Fluvial sediment transport: analytical techniques for measuring sediment load. International Atomic Energy Agency TecDoc 1461
Tazioli A, Tomassoni D (2003) Relazione tra afflussi meteorici ed eventi di piena in due corsi d’acqua marchigiani. Aspetti morfologici e idrologici (Comparison between rainfall and floods in two rivers of Marche Region. Morphological and hydrological characters). Paper presented at the 1st national congress, AIGA (Italian Association of Applied Geology), Chieti (Italy), 19-20 February 2003
Tazioli A, Tomassoni D, Tazioli GS (2005) Uso di radioisotopi per la valutazione dell’erosione a partire da misure del trasporto solido in bacini attrezzati (The use of radioisotopes for erosion evaluation from measuring sediment load in equipped watershed). Giornale di Geologia Applicata 2(2005):429-435 doi:10.1474/GGA.2005-02.0-63.0089
Tazioli GS (1980) The measurement of suspended sediment transport in natural streams using automatic radioisotope gauges. J Hydrol 47:173-185
Tazioli GS, Ciancetti GF, Radicioni F, Marcellini M (1987) Variazioni morfologiche dell’alveo del F. Musone occorse negli ultimi cento anni (Morphological variations of thalweg of Musone river in the last 100years). Paper presented at national conference on “Modelli dei Fenomeni Idraulico-Fluviali, Regime degli alvei in relazione al regime idrologico”, Bologna (Italy), 17-18 June 1986
Zemljic M (1971) Calcul du debit solide. Èvaluation de la vegetación comme un facteurs antierosif (Calculation of sediment load. Evaluation of vegetation as anti-erosive factor). Paper presented at the international symposium interpraevent, Villach (Australia)
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Many thanks to Prof. D. Tomassoni and Prof. G.F. Ciancetti for the precious support in work revision.
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Tazioli, A. Evaluation of erosion in equipped basins: preliminary results of a comparison between the Gavrilovic model and direct measurements of sediment transport. Environ Geol 56, 825–831 (2009). https://doi.org/10.1007/s00254-007-1183-y
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DOI: https://doi.org/10.1007/s00254-007-1183-y