Methods for determination of radioactive substances in water and fluvial sediments

Thatcher, L. L.; Janzer, V.J.; Edwards, K

doi:10.3133/ofr76560

Cited by 173 publications

(59 citation statements)

References 11 publications

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“…Sampling for 3 H analyses was carried out in 500 mL polyethylene bottles and analysis were performed at the hydrogeology Department of the University of Avignon, France, by electrolytic enrichment and liquid scintillation counting method (Thatcher et al, 1977).…”

Section: Dating Tracers Excess Air and Recharge Temperaturementioning

confidence: 99%

Residence time, mineralization processes and groundwater origin within a carbonate coastal aquifer with a thick unsaturated zone

Santoni

Huneau

Garel

et al. 2016

Journal of Hydrology

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Section: Dating Tracers Excess Air and Recharge Temperaturementioning

confidence: 99%

Residence time, mineralization processes and groundwater origin within a carbonate coastal aquifer with a thick unsaturated zone

Santoni

Huneau

Garel

et al. 2016

Journal of Hydrology

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“…Water samples from DrA were selected as representative of water that can discharge, by natural or artificial drainage, from the deepest and longest circulation path developed through the slope. Analysis was performed using the electrolytic enrichment and liquid scintillation counting method (Thatcher et al, 1977). Results were expressed as Tritium Units (T.U.…”

Section: Groundwater Isotopic Analysesmentioning

confidence: 99%

Origin and assessment of deep groundwater inflow in the Ca' Lita landslide using hydrochemistry and in situ monitoring

Cervi

Ronchetti

Martinelli

et al. 2012

Hydrol. Earth Syst. Sci.

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Abstract. Changes in soil water content, groundwater flow and a rise in pore water pressure are well-known causal or triggering factors for hillslope instability. Rainfall and snowmelt are generally assumed as the main sources of groundwater recharge. This assumption neglects the role of deep water inflow in highly tectonized areas, a factor that can influence long-term pore-pressure regimes and play a role on local slope instability.This paper aims to assess the origin of groundwater in the Ca' Lita landslide (northern Italian Apennines) and to qualify and quantify the aliquot attributable to deep water inflow. The research is essentially based on in situ monitoring and hydrochemical analyses. It involved 5 yr of continuous monitoring of groundwater levels, electrical conductivity and temperature and with groundwater sampling followed by determination of major ions (Na + , K + , Mg 2+ , Ca 2+ , Cl − , HCO Results show that the groundwater balance in the Ca' Lita landslide must take into account an inflow of deep and highly mineralised Na-SO 4 water (more than 9500 µS cm −1 ) with non-negligible amounts of Cl − (up to 800 mg l −1 ). The chemical and isotopic fingerprint of this water points to oilfield water hosted at large depths in the Apennine chain and that uprises through a regional fault line crossing the landslide area. It recharges the aquifer hosted in the bedrock underlying the sliding surface (at a rate of about 49 000-85 700 m 3 yr −1 ) and it also partly recharges the landslide body. In both the aquifers, the hydrochemical imprint of deep water mixed with rainfall and snowmelt water was observed. This indicates a probable influence of deep water inflow on the mobility of the Ca' Lita landslide, a finding that could be applicable to other large landslides occurring in highly tectonized areas in the northern Apennines or in other mountain chains. The paper demonstrates that hydrochemistry should, therefore, be considered as a valuable investigation method to define hydrogeological limits and the groundwater sources in hillslope and to assess groundwater flow patterns in deepseated landslides.

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“…The similarity of the effective hydraulic conductivity at the well field scale and at the kilometer scale indicates that the highly permeable fractures funnel fluid movement, but only over distances of 20 to 50 m. Over larger distances, groundwater moves through both highly permeable fractures and a network of less permeable fractures, and it is the network of less permeable fractures that controls the bulk hydraulic conductivity of the rock. ysis of 3H were collected in 1 L glass bottles and analyzed by the USGS isotope laboratory in Menlo Park, California, using electrolytic enrichment and liquid scintillation counting [Thatcher et al, 1977]. Water samples for analysis of dissolved gases in groundwater were collected from selected intervals of bedrock boreholes and drift piezometers using a 0.5-L glass chambers with an evacuated 0.05-L sidearm tube [Pearson et al, 1978].…”

mentioning

confidence: 99%

Effective matrix diffusion in kilometer‐scale transport in fractured crystalline rock

Shapiro¹

2001

Water Resources Research

134

137

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Methods for determination of radioactive substances in water and fluvial sediments

Cited by 173 publications

References 11 publications

Residence time, mineralization processes and groundwater origin within a carbonate coastal aquifer with a thick unsaturated zone

Residence time, mineralization processes and groundwater origin within a carbonate coastal aquifer with a thick unsaturated zone

Origin and assessment of deep groundwater inflow in the Ca' Lita landslide using hydrochemistry and in situ monitoring

Effective matrix diffusion in kilometer‐scale transport in fractured crystalline rock

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