![Characterisation of submarine groundwater discharge offshore south-eastern Sicily [An article from: Journal of Environmental Radioactivity]](https://www.ebooknetworking.net/books/noimage.jpg)
Characterisation of submarine groundwater discharge offshore south-eastern Sicily [An article from: Journal of Environmental Radioactivity]
Book Details
PublisherElsevier
ISBN / ASINB000P6NWOK
ISBN-13978B000P6NWO6
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Journal of Environmental Radioactivity, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
A complex approach in characterisation of submarine groundwater discharge (SGD) off south-eastern Sicily comprising applications of radioactive and non-radioactive tracers, direct seepage measurements, geophysical surveys and a numerical modelling is presented. SGD fluxes in the Donnalucata boat basin were estimated by direct seepage measurements to be from 4 to 12Ls^-^1, which are comparable with the total SGD flux in the basin of 17Ls^-^1 obtained from radon measurements. The integrated SGD flux over the Donnalucata coast estimated on the basis of Ra isotopes was around 60m^3s^-^1 per km of the coast. Spatial variations of SGD were observed in the Donnalucata boat basin, the average ^2^2^2Rn activity concentration in seawater varied from ~0.1kBqm^-^3 to 3.7kBqm^-^3 showing an inverse relationship with salinity. The continuous monitoring carried out at the site closest to the coast has revealed an inverse relationship of ^2^2^2Rn activity concentration on the tide. The ^2^2^2Rn concentrations in seawater varied from 2.3kBqm^-^3 during high tides to 4.8kBqm^-^3 during low tides, thus confirming an influence of the tide on submarine groundwater discharge. Stable isotopes (@d^2H and @d^1^8O) showed that SGD samples consist up to 50% of groundwater. Geo-electrical measurements showed a spatial variability of the salt/fresh water interface and its complex transformation in the coastal zone. The presented results imply that in the studied Donnalucata site there are at least two different sources of SGD, one superficial, represented by mixed fresh water and seawater, and the second one which originates in a deeper limestone aquifer.
Description:
A complex approach in characterisation of submarine groundwater discharge (SGD) off south-eastern Sicily comprising applications of radioactive and non-radioactive tracers, direct seepage measurements, geophysical surveys and a numerical modelling is presented. SGD fluxes in the Donnalucata boat basin were estimated by direct seepage measurements to be from 4 to 12Ls^-^1, which are comparable with the total SGD flux in the basin of 17Ls^-^1 obtained from radon measurements. The integrated SGD flux over the Donnalucata coast estimated on the basis of Ra isotopes was around 60m^3s^-^1 per km of the coast. Spatial variations of SGD were observed in the Donnalucata boat basin, the average ^2^2^2Rn activity concentration in seawater varied from ~0.1kBqm^-^3 to 3.7kBqm^-^3 showing an inverse relationship with salinity. The continuous monitoring carried out at the site closest to the coast has revealed an inverse relationship of ^2^2^2Rn activity concentration on the tide. The ^2^2^2Rn concentrations in seawater varied from 2.3kBqm^-^3 during high tides to 4.8kBqm^-^3 during low tides, thus confirming an influence of the tide on submarine groundwater discharge. Stable isotopes (@d^2H and @d^1^8O) showed that SGD samples consist up to 50% of groundwater. Geo-electrical measurements showed a spatial variability of the salt/fresh water interface and its complex transformation in the coastal zone. The presented results imply that in the studied Donnalucata site there are at least two different sources of SGD, one superficial, represented by mixed fresh water and seawater, and the second one which originates in a deeper limestone aquifer.
