Search Results - "Stephens, Daniel B"

Development and evaluation of the Maxey-Eakin recharge method by Stephens, Daniel B., Umstot, Todd

“…The Maxey-Eakin method affords a convenient means to estimate natural groundwater recharge and has been widely applied to desert basins in the Southwestern…”
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Analysis of the Groundwater Monitoring Controversy at the Pavillion, Wyoming Natural Gas Field by Stephens, Daniel B.

“…The U.S. Environmental Protection Agency (EPA) was contacted by citizens of Pavillion, Wyoming 6 years ago regarding taste and odor in their water wells in an…”
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Perspectives from a Water Resources and Environmental Consultant by Stephens, Daniel B.

“…A former academic who founded his own consulting firm 35 years ago reflects upon how the industry reached its current place, where it is headed and what might…”
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Decentralized Groundwater Recharge Systems Using Roofwater and Stormwater Runoff by Stephens, Daniel B., Miller, Mark, Moore, Stephanie J., Umstot, Todd, Salvato, Deborah J.

“…Stormwater capture for groundwater recharge in urban areas is usually conducted at the regional level by water agencies. Field and modeling studies in New…”
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Also Consider the Recharge by Stephens, Daniel B.

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A comparison of estimated and calculated effective porosity by Stephens, Daniel B, Hsu, Kuo-Chin, Prieksat, Mark A, Ankeny, Mark D, Blandford, Neil, Roth, Tracy L, Kelsey, James A, Whitworth, Julia R

“…Effective porosity in solute-transport analyses is usually estimated rather than calculated from tracer tests in the field or laboratory. Calculated values of…”
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An Imminent Human Resource Crisis in Ground Water Hydrology? by Stephens, Daniel B.

“…Anecdotal evidence, mostly from the United States, suggests that it has become increasingly difficult to find well‐trained, entry‐level ground water…”
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Recent Trends in Hydrogeology and Environmental Consulting and Perspective on Maturing of Hydrogeology Profession by Stephens, Daniel B

“…This paper is a reflection of the development of the field of groundwater hydrology over the past 50 years or so. The field of hydrogeology began to grow…”
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British land drainers: their place among pre-Darcy forefathers of applied hydrogeology by Stephens, Daniel B, Stephens, Deborah A

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An analytical solution for vertical transport of volatile chemicals in the vadose zone by Shan, Chao, Stephens, Daniel B.

“…An analytical solution is presented for one-dimensional vertical transport of volatile chemicals through the vadose zone to groundwater. The solution accounts…”
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DNAPL migration through a fractured perching layer by Stephens, D.B. (Daniel B. Stephens and Associates Inc., Albuquerque, NM.), Kelsey, J.A, Prieksat, M.A, Piepho, M.G, Shan, C, Ankeny, M.D

“…The migration of a DNAPL (TCA) was demonstrated by a laboratory flow visualization experiment. The system consists of two unconfined aquifers separated by a…”
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A Missing Link in the Historical Development of Hydrogeology by Stephens, Daniel B., Ankeny, Mark D.

“…In 1764, after Joseph Elkington forced an iron bar roughly four feet below the base of a trench, caused a great quantity of water to issue from the hole and…”
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A perspective on diffuse natural recharge mechanisms in areas of low precipitation by Stephens, D.B

“…Extensive studies document that significant recharge can occur in arid and semiarid climates, even where annual potential evapotranspiration exceeds…”
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Decentralized Groundwater Recharge Systems Using Roofwater and Stormwater Runoff 1 by Stephens, Daniel B., Miller, Mark, Moore, Stephanie J., Umstot, Todd, Salvato, Deborah J.

“…Stephens, Daniel B., Mark Miller, Stephanie J. Moore, Todd Umstot, and Deborah J. Salvato, 2011. Decentralized Groundwater Recharge Systems Using Roofwater and…”
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Decentralized Groundwater Recharge Systems Using Roofwater and Stormwater Runoff1 by Stephens, Daniel B., Miller, Mark, Moore, Stephanie J., Umstot, Todd, Salvato, Deborah J.

“…Stephens, Daniel B., Mark Miller, Stephanie J. Moore, Todd Umstot, and Deborah J. Salvato, 2011. Decentralized Groundwater Recharge Systems Using Roofwater and…”
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Evaluation of closed-form analytical models to calculate conductivity in a fine sand by Stephens, D.B, Rehfeld, K.R

“…The soil‐water characteristic curve, θ—ψ, was determined for an undisturbed core of fine sand over a range of negative pressure heads observed in the field, 0…”
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Book review: 200 Years of British Hydrogeology, by J. D. Mather (ed.) (Geological Society, London, 2004) Geol Soc London Spec Publ 225, 393pp. ISBN 978-1-86239-155-0 by Stephens, Daniel B.

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Closure to "Vadose Zone Permeability Tests: Unsteady Flow" by D. B. Stephens and S. P. Neuman (May, 1982) by Stephens, Daniel B, Neuman, Shlomo P

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A uthors ’R eply by Stephens, Daniel B., Shan, Chao

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Authors'Reply by Stephens, Daniel B., Shan, Chao

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