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UID:pretalx-flowpath-2025-JJTU77@talks.staging.osgeo.org
DTSTART;TZID=CET:20250612T091000
DTEND;TZID=CET:20250612T092000
DESCRIPTION:The Venice coastal plain and its surroundings is suffering of s
 oil and surface water salinization due to seepage of saline groundwater in
 to drainage canals of agricultural lands and soil salinization due to irri
 gation water quality. To study this phenomenon\, two agricultural fields e
 xperiencing crop yield decrease in the last years were selected. The field
 s are located in a reclaimed area at approximately 2 m below sea level in 
 the Venice province\, 2.5 km from the Venice Lagoon (Site 1) and in Rovigo
  province\, 10.5 km from the Venice Lagoon and 18.5 km from the Adriatic S
 ea (Site 2). To delineate the salinity gradients\, 9 high resolution verti
 cal profiles of soil cores were collected with an electrical auger corer a
 nd analysed in the field via a Meter® TDR for porewater salinity\, volume
 tric water content (VWC)\, and temperature\, and in the laboratory for sed
 imentary organic matter (SOM) gravimetrically\, major ions and trace eleme
 nts (TEs) via IC and ICP-EOS\, respectively. The composition of porewater
 ’s leaching fraction (LF) was gained via deionized water batch extractio
 n with solid liquid ratio 1:5\, while the plant available water (PAW) was 
 obtained via microwave hot water extraction in three selected profiles. St
 ratigraphical cores were almost homogeneous with the most permeable layers
  constituted by organic sandy layers. An average porewater salinity of 2.2
  g/l with an upward increasing trend was found in Site 1\, while an averag
 e porewater salinity of 3.5 g/l with a downward increasing trend was found
  in Site 2. Vertical profiling highlighted the strong connection among som
 e trace elements and the saline organic horizons in Site 2\, characterized
  by paleo-seawater upward fluxes. Conversely\, Site 1 was mostly affected 
 by evapoconcentration processes of irrigation waters. The PAW salinity was
  up to two times the LF\, highlighting that organic layers are the major s
 aline source in these reclaimed lands and they can release large amount of
  solutes as well as TEs.
DTSTAMP:20260428T165439Z
LOCATION:Room R3
SUMMARY:Profiling salinity in a coastal shallow aquifer near the Venice lag
 oon - Luigi Alessandrino
URL:https://talks.staging.osgeo.org/flowpath-2025/talk/JJTU77/
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