A 3D hydrodynamic fate and transport model for herbicides in Sacca di Goro coastal lagoon (Northern Adriatic)

Carafa, Roberta; Marinov, Dimitar; Dueri, Sibylle; Jan, Wollgast; Ligthart, J.; Canuti, Elisabetta; Viaroli, Pierluigi; Zaldı́var, J.M.

doi:10.1016/j.marpolbul.2006.02.025

Cited by 36 publications

(16 citation statements)

References 41 publications

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“…In addition, the chemical characteristics of anthropogenically modified freshwater inflows often differ from natural inflows and can contribute to pollution (e.g. Perez-Ruzafa et al, 2005;Carafa et al, 2006;De Pippo et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Hydrological characteristics of three North African coastal lagoons: insights from the MELMARINA project

et al. 2009

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Hydrological and hydrodynamic characteristics are important controls in all wetlands including coastal lagoons. Enhanced understanding of lagoon functioning can be obtained through the acquisition and interpretation of hydrological, meteorological and related data. The MELMARINA Project investigated links between hydrological and ecological conditions within North African coastal lagoons. It employed three primary sites: Merja Zerga in Morocco, Ghar El Melh in Tunisia and Lake Manzala in Egypt. Hydrological, meteorological and related data were acquired for these lagoons. Data included precipitation, evaporation, wind speed and direction, freshwater discharges into the lagoons, tides beyond the lagoons in the open sea, lagoon bathymetry and time series of lagoon water levels/ depths. Data were acquired from secondary sources (including online archives) and targeted field survey and monitoring programmes. Interpretation of these data provides insights into the hydrological functioning of the lagoons and contributed to the modelling requirements of MELMARINA. The functioning of Merja Zerga is dominated by the exchange of water between the Atlantic and the lagoon. Large, tidally induced oscillations in water level are responsible for the inundation of extensive inter-tidal mudflats whilst the rapid replacement of water by exchanges with the sea diminishes the influence of freshwater inflows and winter rainfall. The smaller Mediterranean tides reduce the magnitude of lagoon-sea exchanges and result in much smaller water level oscillations within Ghar El Melh. As a result, this lagoon lacks the intertidal environments found within the Moroccan site and hydrodynamic conditions are more likely influenced by wind set up. Although freshwater inflows to Ghar El Melh are smaller than those in Merja Zerga, their effects, coupled with heavy winter rainfall, can persist due to longer residence times of water within the lagoon. Freshwater inflows are central to the functioning of Lake Manzala. Large discharges of relatively freshwater are provided by major drains which cross the Nile Delta. These influence lake water levels and are responsible for the freshwater conditions within large parts of the lake. The small tidal range of the eastern Mediterranean, coupled with constricted connections with the sea, reduces the influence of lake-sea exchanges and tidally induced water level oscillations within Lake Manzala.

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Section: Introductionmentioning

confidence: 99%

Hydrological characteristics of three North African coastal lagoons: insights from the MELMARINA project

et al. 2009

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“…Its mean concentration was comparable with values reported for other Mediterranean lagoons, such as Comacchio lagoon (0.68 ± 0.42 SD, [30], and Berre lagoon (DDE: 1.7 µg/kg; [31], but it exceeded its EQS in some samples. The watershed of Sacca di Goro is predominantly agricultural, with only a few main crop typologies: corn and wheat, rice, sugar beets, soybean, and vegetables [8]. The main freshwater input and therefore the major input of pollutants of agricultural origin in the lagoon comes from Po di Volano canal.…”

Section: Organochlorine Pesticides Contaminationmentioning

confidence: 99%

“…The dominance of DDE, with low concentrations of DDT, in Sacca di Goro indicates that the contamination was likely not recent. One among the probable causes for the persistence of those contaminants is the storage in the watershed soils and/or aquatic sediments and delayed delivery [8]. DDT compounds are of particular concerned, since their toxicity for benthic organisms has been proved by several studies (e.g., for amphipods) [34,35].…”

Section: Organochlorine Pesticides Contaminationmentioning

confidence: 99%

Multiannual Trend of Micro-Pollutants in Sediments and Benthic Community Response in a Mediterranean Lagoon (Sacca di Goro, Italy)

Pitacco

Mistri

Ferrari

et al. 2020

Water

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Long-term variations of ecological status in a Mediterranean coastal lagoon (Sacca di Goro, Northern Adriatic) were investigated, combining data on the concentration of surface sediment contaminants and on the structure of the macrobenthic community. The aim was to assess any amount of chemical contamination and check the response of the macrobenthic community to sediment contamination. Over the studied period, the sediments of the lagoon showed contamination by trace metals and organochlorine pesticides, with most of them exceeding the thresholds indicated by the Italian legislation in many samples. Contamination by polychlorinated dibenzodioxins and dibenzofurans (PCDD/Fs) and polycyclic aromatic hydrocarbons (PAHs) instead never exceeded the threshold. The ecological status based on the macrobenthic community, evaluated through biotic indices (AMBI and M-AMBI), fell below the Good/Moderate threshold in most samples. The results indicate a possible influence of toxic compounds in sediment on benthic organisms, but most of the variability shown by the macrobenthic community is probably due to other factors. The difficulty in establishing a cause/effect relationship was due to the co-occurrence and variability of various stressors (both natural and anthropogenic) and their interactions. The methods currently used for monitoring transitional waters thus seem insufficient to disentangle the effect of pollutants and other environmental variables on the benthos. Integrated approaches (e.g., bioaccumulation and toxicity tests) are thus needed for a more precise identification of the risk posed by a high concentration of pollutants in such environments.

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“…Wu and Falconer (2000) developed a model to simulate salinity and cohesive sediment transport in the Humber Estuary, UK, and presented some validation data, but only for current velocities, salinity, and cohesive sediment concentration. Carafa et al (2006) used the COHERENS model to simulate fate and transport of herbicides in a coastal lagoon of the Northern Adriatic and presented significant amounts of validation data. However, these data were sparse in time, with several data points spanning an entire year.…”

Section: Introductionmentioning

confidence: 99%

Transport and Dispersion of a Conservative Tracer in Coastal Waters with Large Intertidal Areas

Blanton

Garrett

Bollinger

et al. 2009

Estuaries and Coasts

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In late December 1991, an accidental release of 5,700 CI of tritiated water (HTO) from the Savannah River Site was transported via site streams into the Savannah River where it was carried downstream to the coastal zone. HTO released into a semitropical Georgia estuary was forced into the tidal marshes surrounding the estuary as well as discharged directly into the Atlantic Ocean. The spreading of HTO was studied with a 3D hydrodynamic model (ALGE) that includes flooding and draining of intertidal areas. Comparisons of model simulations to measured HTO concentration showed that ALGE simulated well the general increase and decrease of HTO as its plume passed a given area. The "sheet flow" approximation for marsh and small tidal creek flow largely compensated for lack of model resolution and accurate bathymetry in areas with numerous small to medium-sized tidal creeks. The water volume of the unresolved tidal creeks had to be accounted for in the simulations by increasing the initial water depth over the marshes. ALGE and a simple box model both reproduced the trapping of HTO in intertidal areas. The time scale over which intertidal areas import and export HTO back to the tidal channels varies between 10 and 30 days.

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A 3D hydrodynamic fate and transport model for herbicides in Sacca di Goro coastal lagoon (Northern Adriatic)

Cited by 36 publications

References 41 publications

Hydrological characteristics of three North African coastal lagoons: insights from the MELMARINA project

Hydrological characteristics of three North African coastal lagoons: insights from the MELMARINA project

Multiannual Trend of Micro-Pollutants in Sediments and Benthic Community Response in a Mediterranean Lagoon (Sacca di Goro, Italy)

Transport and Dispersion of a Conservative Tracer in Coastal Waters with Large Intertidal Areas

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