scholarly journals Cerenkov Counter for In-Situ Groundwater Monitoring of 90Sr

Sensors ◽  
2005 ◽  
Vol 5 (1) ◽  
pp. 51-60 ◽  
Author(s):  
Robert Runkle ◽  
Ronald Brodzinski ◽  
David Jordan ◽  
John Hartman ◽  
Walter Hensley ◽  
...  
Keyword(s):  
Groundwater Monitoring ◽  
Cerenkov Counter

scholarly journals Estimating Groundwater Abstractions at the Aquifer Scale Using GRACE Observations

Geosciences ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 419 ◽  
Author(s):  
Alexandra Gemitzi ◽  
Venkat Lakshmi
Keyword(s):  
Groundwater Monitoring ◽  
Performance Metrics ◽  
Groundwater Resources ◽  
Economic Recession ◽  
Remotely Sensed Data ◽  
Long Time ◽  
Meteorological Observations ◽  
Input Variables ◽  
Artificial Neural Network Ann

Groundwater monitoring requires costly in situ networks, which are difficult to maintain over long time periods, especially in countries facing economic recession such as Greece. Our work aims at providing a methodology to estimate groundwater abstractions at the aquifer scale using publicly available remotely sensed data from the NASA’s Gravity Recovery and Climate Experiment (GRACE) together with publicly available meteorological observations that serve as input variables to an Artificial Neural Network (ANN) method. The methodology was demonstrated in an alluvial aquifer in NE Greece for a 10-year period (2005–2014), where irrigation agriculture poses a serious threat to both groundwater resources and their dependent ecosystems. To generalize the developed model, an ensemble of 100 ANNs was created by the initial weight randomization approach and output was computed by averaging the output of each individual model. Scaled Root Mean Square Error and Nash–Sutcliffe coefficient were used to test the model efficiency. Both of these performance metrics indicated that monthly groundwater abstractions can be estimated efficiently and that the developed methodology offers an inexpensive substitute for in situ groundwater monitoring when in situ networks are not available or cannot operate properly.

CSIRO SENSEI™ in Situ System for Groundwater Monitoring

2020 ◽  
Vol MA2020-01 (29) ◽  
pp. 2210-2210
Author(s):  
Mikko Vepsalainen ◽  
Daniella Caruso ◽  
Kathryn Levingstone ◽  
Rohan Calley ◽  
Miao Chen ◽  
...  
Keyword(s):  
Groundwater Monitoring

scholarly journals CSIRO In-Situ Lab: A multi-pronged approach to surface gas and groundwater monitoring at geological CO2 storage sites

2020 ◽  
Vol 545 ◽  
pp. 119642 ◽  
Author(s):  
Matthew Myers ◽  
Cameron White ◽  
Bobby Pejcic ◽  
Andrew Feitz ◽  
Jennifer Roberts ◽  
...  
Keyword(s):  
Groundwater Monitoring ◽  
Co2 Storage ◽  
Geological Co2 Storage

Design and construction of a Cerenkov counter for in situ monitoring of 90Sr in groundwater

2008 ◽  
Vol 277 (1) ◽  
pp. 235-239 ◽  
Author(s):  
R. L. Brodzinski ◽  
R. C. Runkle ◽  
J. S. Hartman ◽  
E. D. Ashbaker ◽  
M. Douglas ◽  
...  
Keyword(s):  
In Situ Monitoring ◽  
Cerenkov Counter ◽  
Design And Construction

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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