Water 2015, 7, 3943-3962; doi:10.3390/w7073943 OPEN ACCESS water ISSN 2073-4441 www.mdpi.com/journal/water Article Optimizing Dredge-and-Dump Activities for River Navigability Using a Hydro-Morphodynamic Model Andries J. Paarlberg 1, Massimo Guerrero 2,*, Fredrik Huthoff 1 and Mariano Re 3 1 HKV Consultants, Lelystad 8232, The Netherlands; E-Mails:
[email protected] (A.J.P.);
[email protected] (F.H.) 2 Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), University of Bologna, Bologna 40136, Italy 3 National Institute for Water (INA), Ezeiza, Buenos Aires 1804, Argentina; E-Mail:
[email protected] * Author to whom correspondence should be addressed; E-Mail:
[email protected]; Tel.: +39-051-2090519. Academic Editor: Markus Disse Received: 9 May 2015 / Accepted: 8 July 2015 / Published: 17 July 2015 Abstract: Worldwide, significant dredging activities of riverbed sediment are employed to ensure that freight transportation on rivers can continue year-round. Imbalances of sediment budget may produce relevant impacts regarding river morphology and related environmental services. This study shows that hydro-morphodynamic modeling tools can be used to optimize dredge-and-dump activities and, at the same time, mitigate problems deriving from these activities in rivers. As a case study, we focused on dredging activities on the Lower Parana River, Argentina. Navigation on this river is of crucial importance to the economies of the bordering countries, hence, each year significant dredging activities are employed. To estimate dredging loads under different strategies, a 25 km river reach of the Parana River was modeled using the Delft3D-modelling suite by Deltares.