Results 161 to 170 of about 7,123,984 (286)

Evaluating Suitability for Surface Managed Aquifer Recharge to Enhance Dry‐Season Stream Flows

open access: yesGroundwater, EarlyView.
Identifying suitable sites for surface MAR projects to enhance dry‐season stream flow requires evaluating the geology of the aquifer, depth to groundwater, soil permeability, topographic slope, the distance between the infiltration basin and receiving surface water, and other factors.
Andrew L. Bobst, Ann E.H. Hanson
wiley   +1 more source

Effects of material stratification on the seepage field in a rockfill dam

open access: yes, 2006
Transient seepage analyses for Gouhou concrete faced rockfill dam were conducted using the unsaturated soil seepage theory. Through comparison of the seepage fields in a uniform dam and an evidently stratified dam, the evolution of seepage with time and ...
Chen, Qun, Zhang, Li Min, Zhu, Fen Qing
core  

Using the Transition Assessment Teaching Assistant to Evaluate a Transition from Pump and Treat to MNA

open access: yesGroundwater Monitoring &Remediation, EarlyView.
Abstract At many sites, chlorinated ethenes in some of the monitoring wells remain above cleanup goals, even though the water produced by the pumped wells of the pump‐and‐treat system meets the goals. Regulators and site risk managers need tools to determine whether it is appropriate to shut‐down the pump‐and‐treat system and transition to monitored ...
John T. Wilson   +8 more
wiley   +1 more source

Reconnaissance‐Scale Methods for the Identification of Groundwater Discharge to Streams

open access: yesGroundwater Monitoring &Remediation, EarlyView.
Abstract Identifying groundwater discharge locations is critical for understanding and monitoring groundwater contributions to streams in terms of water quantity and quality. Streams and rivers are under increasing strain from factors, including increased urbanization, agricultural land use, groundwater extraction, and climate change, which can alter ...
Corey M. Zanatta   +2 more
wiley   +1 more source

Delivering Sulfate to LNAPL Body for Enhanced Source Zone Depletion (ESZD)

open access: yesGroundwater Monitoring &Remediation, EarlyView.
Abstract This field pilot study evaluates the feasibility of applying sulfate to a light non‐aqueous phase liquid (LNAPL) body for achieving enhanced source zone depletion (ESZD) at a refinery site. Two rounds of gypsum land application (GLA) delivered sulfate to an 8000 ft2 area encompassing LNAPL‐containing monitoring wells MW‐2 and MW‐3, while MW‐1 ...
Ravi Kolhatkar   +2 more
wiley   +1 more source

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