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David J. Hart
University of Wisconsin–Extension
41Publications
10H-index
473Citations
Publications 41
Newest
#1Daniel T. Feinstein (UWM: University of Wisconsin–Milwaukee)H-Index: 3
#2David J. HartH-Index: 10
Last.Michael N. Fienen (USGS: United States Geological Survey)H-Index: 24
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#1Adam McDaniel (UW: University of Wisconsin-Madison)H-Index: 2
#2James M. Tinjum (UW: University of Wisconsin-Madison)H-Index: 11
Last.Lauren K. Thomas (UW: University of Wisconsin-Madison)H-Index: 1
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Abstract A fiber optic distributed thermal response test (DTRT) conducted in well-documented heterogeneous geology is combined with laboratory thermophysical measurements of cores and novel data analysis techniques to provide a detailed description of variability in subsurface heat transfer. The results of this study show that appreciable variation in subsurface heat flow exists and can be quantified in a lithological context, which may aid in the optimization of future geothermal borefield desi...
1 CitationsSource
#1Adam McDanielH-Index: 2
#2James M. Tinjum (UW: University of Wisconsin-Madison)H-Index: 11
Last.Dante Fratta (UW: University of Wisconsin-Madison)H-Index: 14
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Distributed Temperature Sensing (DTS) is a technique that uses the interaction of laser pulses with silica to continuously sense temperature along the length of fiber-optic cables. The temporal and spatial resolution of DTS makes it an excellent technique for monitoring the performance of district-scale geothermal exchange borefields. A dynamic, double-ended calibration routine developed in response to site-specific challenges and constraints (i.e., more than 5 km, many splices, different fiber ...
1 CitationsSource
#1Adam McDaniel (UW: University of Wisconsin-Madison)H-Index: 2
#2Dante Fratta (UW: University of Wisconsin-Madison)H-Index: 14
Last.David J. Hart (University of Wisconsin–Extension)H-Index: 10
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Abstract Fiber optic (FO) distributed temperature sensing (DTS) was used for long-term monitoring of a 280-m by 360-m geothermal exchange borefield with 2596 boreholes to quantify the role of groundwater flow and thermophysical properties on subsurface heat transfer and storage. Most district-scale borefields are subject to a sustained imbalance in heating or cooling loads and experience yearly subsurface temperature increases that may, without corrective action, lead to diminished borefield per...
1 CitationsSource
#1David J. HartH-Index: 10
Last.Dante FrattaH-Index: 14
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#1David J. HartH-Index: 10
#2Maureen A. MuldoonH-Index: 7
Last.Kenneth R. BradburyH-Index: 2
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#2Jean M. BahrH-Index: 19
Last.David J. HartH-Index: 10
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#1John A. LuczajH-Index: 6
#2Julie MaasH-Index: 1
Last.Jonathan OdekirkH-Index: 1
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The Northeast Groundwater Management Area of Wisconsin, USA contains two major cones of depression in a confined sandstone aquifer. Each cone is centered near cities that have used groundwater for over 100 years. Near one of these cities (Green Bay), episodic changes in the development of groundwater and surface water resources during this period have resulted in major changes to the potentiometric surface. On two occasions, roughly 50 years apart, reductions in groundwater withdrawals have resu...
3 CitationsSource
#1Lauren K. ThomasH-Index: 1
#2James M. TinjumH-Index: 11
Last.Dante FrattaH-Index: 14
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#1Susan K. SwansonH-Index: 6
Last.David J. HartH-Index: 10
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