New Field Method to Determine Streamflow Timing Using Electrical Resistance Sensors

Blasch, Kyle W.; Ferré, T. P. A.; Christensen, Allen H.; Hoffmann, John P.

doi:10.2136/vzj2002.0289

Cited by 25 publications

(50 citation statements)

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“…Seven additional visual observations during dry periods were also confirmed. These data are consistent with successful detections in ephemeral channels previously documented (Blasch et al, 2002). The success of the ER sensors within the cave environment is attributed to the lack of physical hazards such as high streamflow velocities, debris, and scour or deposition processes.…”

Section: Results and Discussion Electrical Resistance Sensor Performasupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

“…Electrical-resistance (ER) sensors have been used to determine the presence of flow in ephemeral stream channels based on the ability of water to conduct electricity (Blasch et al, 2002). ER sensors were constructed using modified TidbiT sensors (Onset Corporation, Bourne, Massachusetts) as described by Blasch et al (2002). ER sensors have been successfully used to monitor streamflow timing in coarse-grained alluvial channels (Blasch et al, 2002) and bedrock channels (Adams et al, 2006) and on Studies (vol.…”

Section: Introductionmentioning

confidence: 99%

“…ER sensors were constructed using modified TidbiT sensors (Onset Corporation, Bourne, Massachusetts) as described by Blasch et al (2002). ER sensors have been successfully used to monitor streamflow timing in coarse-grained alluvial channels (Blasch et al, 2002) and bedrock channels (Adams et al, 2006) and on Studies (vol. 61, no.…”

Section: Introductionmentioning

confidence: 99%

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Methodology to Assess Water Presence on Speleothems During Periods of Low Precipitation, with Implications for Recharge Sources – Kartcnher Caverns, Arizona

Blasch¹

2011

JCKS

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Beginning in January 2005, recharge processes and the presence of water on speleothems were monitored in Kartchner Caverns during a 44-month period when annual rainfall rates were 6 to 18 percent below the long-term mean. Electrical-resistance sensors designed to detect the presence of water were used to identify ephemeral streamflow in the channels overlying the cave as well as the movement of water within the cave system. Direct infiltration of precipitation through overhead rocks provided consistent inflow to the cave, but precipitation rates and subsequent infiltration rates were reduced during the comparatively dry years. Ephemeral stream-channel recharge through autogenic and allogenic processes, the predominant recharge mechanism during wetter periods, was limited to two low-volume events. From visual observations, it appeared that recharge from channel infiltration was equal to or less than recharge from overhead infiltration. Electrical-resistance sensors were able to detect thin films of water on speleothems, including stalactites, ribbons, and stalagmites. These films of water were directly attributed to overhead infiltration of precipitation. Periods of low precipitation resulted in decreased speleothem wetness.

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Section: Results and Discussion Electrical Resistance Sensor Performasupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Methodology to Assess Water Presence on Speleothems During Periods of Low Precipitation, with Implications for Recharge Sources – Kartcnher Caverns, Arizona

Blasch¹

2011

JCKS

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“…Working under the principle that the water saturation of a material is inversely proportional to the electrical resistance (Archie, 1942;Salve et al, 2000;Blasch et al, 2002) developed ERPs that use filter paper as the sensing element, such that the electrical resistance depends on the amount of water adsorbed on the filter paper. Individual sensors included two electrical leads located between pieces of filter paper.…”

Section: Monitoring Of In-drift Microclimate In Faulted and Non-faultmentioning

confidence: 99%

A qualitative assessment of microclimatic perturbations in a tunnel

Salve

Krakauer

Kowalsky

et al. 2008

Intl Journal of Climatology

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Understanding microclimate dynamics in tunnels is important for designing, operating, and maintaining underground facilities. For example, for the geological disposal of radioactive materials, condensation of vapour should be minimized as liquid water can accelerate waste package corrosion and radionuclide release. While microclimate dynamics are known to be dominated by the advection of heat and moisture, additional factors may also be important, such as the presence of fractures or faults. We present data collected using a relatively inexpensive method that is under development to assess microclimatic perturbations underground. By combining standard temperature and relative humidity sensors with low-cost sensors designed to detect changes in water content, we were able to infer microclimate dynamics along a tunnel at the proposed geological repository at Yucca Mountain, Nevada. We observed significant differences in the pattern of condensation in a faulted zone relative to that of a non-faulted zone, suggesting that hydrogeologic features have to be accounted for when evaluating the microclimate dynamics of excavated cavities in fractured, partially saturated rocks. Published in

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Robust, low‐cost data loggers for stream temperature, flow intermittency, and relative conductivity monitoring

Chapin

Todd

Zeigler

2014

Water Resources Research

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Water temperature and streamflow intermittency are critical parameters influencing aquatic ecosystem health. Low-cost temperature loggers have made continuous water temperature monitoring relatively simple but determining streamflow timing and intermittency using temperature data alone requires significant and subjective data interpretation. Electrical resistance (ER) sensors have recently been developed to overcome the major limitations of temperature-based methods for the assessment of streamflow intermittency. This technical note introduces the STIC (Stream Temperature, Intermittency, and Conductivity logger); a robust, low-cost, simple to build instrument that provides long-duration, high-resolution monitoring of both relative conductivity (RC) and temperature. Simultaneously collected temperature and RC data provide unambiguous water temperature and streamflow intermittency information that is crucial for monitoring aquatic ecosystem health and assessing regulatory compliance. With proper calibration, the STIC relative conductivity data can be used to monitor specific conductivity.

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New Field Method to Determine Streamflow Timing Using Electrical Resistance Sensors

Cited by 25 publications

References 0 publications

Methodology to Assess Water Presence on Speleothems During Periods of Low Precipitation, with Implications for Recharge Sources – Kartcnher Caverns, Arizona

Methodology to Assess Water Presence on Speleothems During Periods of Low Precipitation, with Implications for Recharge Sources – Kartcnher Caverns, Arizona

A qualitative assessment of microclimatic perturbations in a tunnel

Robust, low‐cost data loggers for stream temperature, flow intermittency, and relative conductivity monitoring

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