TITLE:
Measuring Salinity within Shallow Piezometers:Comparison of Two Field Methods
AUTHORS:
Enrico Balugani, Marco Antonellini
KEYWORDS:
Coastal Aquifer, Salt-Water Intrusion, Piezometers, Monitoring
JOURNAL NAME:
Journal of Water Resource and Protection,
Vol.2 No.3,
April
6,
2010
ABSTRACT: The objective of this study is to understand the validity of salinity vertical profiles collected from shallow piezometers that are not previously flushed. This study shows that salinity data collected from boreholes are only an average value along the entire screened section of the piezometer. In order to collect data that is rep-resentative for the salinity of the adjacent aquifer, a new monitoring strategy has been developed. This strat-egy includes measurement of the salinity at the top of the watertable in an auger hole which is a shallow boreholes made with an handheld drill. This should be combined with measurements in piezometers that are first flushed to take out stagnant water. From the piezometers on can measure the average salinity of the screened part and the salinity at the bottom of the aquifer. By using this monitoring strategy it is also possi-ble to define where the piezometers screens are located if this is not known beforehand.