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Article

The Field-Scale Investigation of the Low Mobility of Drainage Canal Sediments Polluted by Copper in Lowland Area of Croatia

1
Institute IGH, 31000 Osijek, Croatia
2
Faculty of Civil Engineering and Architecture, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: Żaneta Polkowska
Water 2021, 13(5), 677; https://doi.org/10.3390/w13050677
Received: 30 December 2020 / Revised: 22 February 2021 / Accepted: 26 February 2021 / Published: 2 March 2021
The sedimentation of drainage canals is a common process and its intensity depends on several geographical and hydrological factors. Drainage canal sediments are frequently polluted by heavy metals or other pollutants; they need to be periodically dredged and ultimately, have to be safely disposed of. Furthermore, pollution in smaller drainages may go undetected because under the Water Framework Directive (Directive 2000/60/EC), catchment areas < 10 km2 do not require monitoring. We investigated the hypothesis that water resources of small sub-catchments exposed to agricultural pollutants accumulate sediment for a longer period (several years) and severely enhance environmental risks. We analyzed the data on sediment mobility in drainage canals for a small lowland catchment in Croatia during 2013–2017. We conducted sediment transport modelling for actual precipitation episodes of a 10-year return period and design precipitation of a 50-year return period. The results indicated that sediments and associated copper pollution persist at the canal bottom for several years, which increases the risk of polluting groundwater and the environment in general. Only copper present at the maximum downstream section of the canal has the possibility of moving to the recipient stream and would only be detected in catchment areas bigger than 10 km2. We proved that smaller water bodies evaluated according to monitoring standards prescribed for the closest larger water can enhance environmental risks. View Full-Text
Keywords: agriculture; sediment transport; Water Framework Directive; pollution agriculture; sediment transport; Water Framework Directive; pollution
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MDPI and ACS Style

Leko Kos, M.; Tadić, L. The Field-Scale Investigation of the Low Mobility of Drainage Canal Sediments Polluted by Copper in Lowland Area of Croatia. Water 2021, 13, 677. https://doi.org/10.3390/w13050677

AMA Style

Leko Kos M, Tadić L. The Field-Scale Investigation of the Low Mobility of Drainage Canal Sediments Polluted by Copper in Lowland Area of Croatia. Water. 2021; 13(5):677. https://doi.org/10.3390/w13050677

Chicago/Turabian Style

Leko Kos, Marija, and Lidija Tadić. 2021. "The Field-Scale Investigation of the Low Mobility of Drainage Canal Sediments Polluted by Copper in Lowland Area of Croatia" Water 13, no. 5: 677. https://doi.org/10.3390/w13050677

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