Autonomous long-term gamma-spectrometric monitoring of submarine groundwater discharge trends in Hawaii

作者：Dulai Henrietta^*; Kamenik Jan; Waters Christine A; Kennedy Joseph; Babinec James; Jolly James; Williamson Mario

来源：Journal of Radioanalytical and Nuclear Chemistry, 2016, 307(3): 1865-1870.

DOI：10.1007/s10967-015-4580-9

• Submarine groundwater discharge
• Long-term SGD monitoring
• Radon
• Underwater gammaspectrometry

We developed a fully autonomous underwater gamma-spectrometer for long-term coastal submarine groundwater discharge (SGD) monitoring. The instrument represents a significant improvement over previous submarine gamma-spectrometers in that it is very robust, has high sensitivity allowing high temporal resolution, and is completely autonomous. Here we describe the technical parameters of the new instrument as well as data collected over its 9-month deployment in Kiholo Bay, HI, USA. We also present methods to convert the measured activities to SGD rates. In Kiholo Bay, the derived SGD matched previous estimates but in addition it revealed previously undocumented short- and long-term patterns in SGD.

• 出版日期2016-3