Tritium in unsaturated zone gases and air at the Amargosa Desert Research Site, and in spring and river water, near Beatty, Nevada, May 1997

1998 ◽  
Author(s):  
Robert G. Striegl ◽  
Richard W. Healy ◽  
Robert L. Michel ◽  
David E. Prudic
Keyword(s):  
River Water ◽  
Unsaturated Zone ◽  
Research Site ◽  
Desert Research

Conception of vadose zone research in the area of Goczałkowice reservoir.

2013 ◽  
Vol 2 (1) ◽  
pp. 22-26
Author(s):  
Joanna Czekaj ◽  
Kamil Trepka
Keyword(s):  
Vadose Zone ◽  
Unsaturated Zone ◽  
Vertical Profile ◽  
Structural Model ◽  
Historical Data ◽  
Integrated System ◽  
Nitrate Transport ◽  
Strategic Research ◽  
Research Site ◽  
Observation Wells

Abstract Goczałkowice reservoir is one of the main source of drinking water for Upper Silesia Region. In reference to Water Frame Directive matter since 2010 the strategic research project: „Integrated system supporting management and protection of dammed reservoir (ZiZoZap)”, which is being conducted on Goczałkowice reservoir, has been pursued. In the framework of this project complex groundwater monitoring is carried on. One aspect is vadose zone research, conducted to obtain information about changes in chemical composition of infiltrating water and mass transport within this zone. Based on historical data and the structural model of direct catchment of Goczałkowice reservoir location of the vadose zone research site was selected. At the end of November 2012 specially designed lysimeter was installed with 10 MacroRhizon samplers at each lithological variation in unsaturated zone. This lysimeter, together with nested observation wells, located in the direct proximity, create the vadose zone research site which main aim is specifying the amount of nitrate transport in the vertical profile.

scholarly journals Portable chamber measurements of evapotranspiration at the Amargosa Desert Research Site near Beatty, Nye County, Nevada, 2003-06

2008 ◽  
Author(s):  
C. Amanda Garcia ◽  
Michael J. Johnson ◽  
Brian J. Andraski ◽  
Keith J. Halford ◽  
C. Justin Mayers
Keyword(s):  
Research Site ◽  
Nye County ◽  
Chamber Measurements ◽  
Desert Research

scholarly journals Heat transport of diurnal temperature oscillations upon river-water infiltration investigated by fiber-optic high-resolution temperature profiling

2011 ◽  
Vol 8 (3) ◽  
pp. 6257-6289
Author(s):  
T. Vogt ◽  
M. Schirmer ◽  
O. A. Cirpka
Keyword(s):  
River Water ◽  
Heat Transport ◽  
Unsaturated Zone ◽  
Riparian Zone ◽  
Shallow Groundwater ◽  
Temporal Variations ◽  
Water Infiltration ◽  
Diurnal Temperature ◽  
Temperature Oscillations ◽  
Losing River

Abstract. River-water infiltration is of high relevance for hyporheic and riparian groundwater ecology as well as for drinking water supply by river-bank filtration. Heat has become a popular natural tracer to estimate exchange rates between rivers and groundwater. However, quantifying flow patterns and velocities is impeded by spatial and temporal variations of exchange fluxes, insufficient sensors spacing during field investigations, or simplifying assumptions for analysis or modeling such as uniform flow. The objective of this study is to investigate local heat transport upon river-water infiltration in the riverbed and the adjacent riparian zone of the losing River Thur in northeast Switzerland. Here we have applied distributed temperature sensing (DTS) along optical fibers wrapped around three tubes to measure high-resolution temperature profiles of the unsaturated zone and shallow groundwater. Diurnal temperature oscillations were tracked in the subsurface and analyzed by means of dynamic harmonic regression to extract amplitudes and phase angles. Subsequent calculations of amplitude attenuation and time shift relative to the river signal show in detail vertical and temporal variations of heat transport. In addition, we apply a numerical two-dimensional heat transport model for the unsaturated zone and shallow groundwater to get a better understanding of the observed heat transport processes in the riparian zone. Our results show that heat transfer of diurnal temperature oscillations from the losing river through groundwater is influenced by thermal exchange with the unsaturated zone. Neglecting the influence of the unsaturated zone would cause biased interpretation and underestimation of groundwater flow velocities. In addition, the observed riparian groundwater temperature distribution cannot be described by uniform flow, but rather by horizontal groundwater flow velocities varying over depth.

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