A Simple and Affordable System for Installing Shallow Drive Point Piezometers

Burk, Lawrence; Cook, Peter G.

doi:10.1111/gwmr.12112

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…The piezometer tube should be long enough to partially penetrate the unconfined aquifer. The walls of the piezometer tube are totally closed except at its lower end, where the tube is screened to form a cylindrical cavity of radius (a) and height (L) within the aquifer [14]. Similar to the auger-hole method, the piezometer method is conducted by removing the water from the pipe and then measuring the rate of rise of the water within the pipe.…”

Section: The Piezometer Methodsmentioning

confidence: 99%

“…Depending on the relative height, L of the cavity as compared with its radius, a, the piezometer method can be used to determine the horizontal or vertical component of K. Thus, if L is large compared to a, the results obtained reflect the horizontal component of K. Otherwise, if L is small compared to a, then the vertical component of K is estimated. The piezometer method is especially suitable for determining K of individual layers in stratified subsurface systems [14]. [16] Developed a suitable equation for determining K in the form:…”

Section: The Piezometer Methodsmentioning

confidence: 99%

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Review of Some Methods of Determining in-Situ Saturated Hydraulic Conductivity of Soil

Danladi¹,

Usman²,

Drambi³

et al. 2018

AJSET

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In-situ determination of K is important especially when the physical features of the soil system in question is to be characterized as accurately as possible. It gives more reliable values because there is minimal disturbance of the soil. It is more representative of the physical reality than the other methods. The objective of this study is therefore to review some of the in-situ methods of determining permeability, K of a soil, stating the conditions, advantages and disadvantages of each of the methods, thereby helping in proper selection of in-situ method to be adopted for a given soil, land terrain and type of aquifer. There are various methods of determining Saturated Hydraulic Conductivity, K of a soil. Application of each of the methods varies depending on the characteristics of the soil such as land terrain, soil water table and type of aquifer present. In this paper, nine insitu methods, which include auger hole, two types of well pumping tests, piezometer, two well, tube, four well, tracer test, point dilution and cone permeameter, as well as thirteen types and fifteen formulae were reviewed. The advantages and disadvantages as well as conditions for use of each of the nine in-situ methods were stated. Out of the nine methods studied, the non-equilibrium condition for determination of R for wells penetrating a confined aquifer is found to be the most reliable. It is obvious that cone permeameter is the fastest and simplest of measuring K at different depths in a single push without the removal of soil or water from the hole, K is automatically measured within 10 minutes as the device's probe is pushed into the desired depth in the ground. In terms of reliability, well pumping test of the non-equilibrium type is the most reliable and produces accurate results. Every other method is more or less related to each other and gives acceptable values of K.

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Section: The Piezometer Methodsmentioning

confidence: 99%

Section: The Piezometer Methodsmentioning

confidence: 99%

Review of Some Methods of Determining in-Situ Saturated Hydraulic Conductivity of Soil

Danladi¹,

Usman²,

Drambi³

et al. 2018

AJSET

View full text Add to dashboard Cite

show abstract

“…The natural flow regime heterogeneity of most plume discharge zones makes the design and implementation of effective in-situ monitoring programs non-trivial (Kalbus et al, 2006;Rivett et al, 2008b;Roy and Bickerton, 2010;Burk and Cook, 2015). Heterogeneous sediment sequences present a common challenge for the development of conceptual models of plume fate (Ellis and Rivett, 2007).…”

Section: Evaluating Hydrological Connectivitymentioning

confidence: 99%

Natural attenuation of chlorinated ethenes in hyporheic zones: A review of key biogeochemical processes and in-situ transformation potential

et al. 2018

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Chlorinated ethenes (CEs) are legacy contaminants whose chemical footprint is expected to persist in aquifers around the world for many decades to come. These organohalides have been reported in river systems with concerning prevalence and are thought to be significant chemical stressors in urban water ecosystems. The aquifer-river interface (known as the hyporheic zone) is a critical pathway for CE discharge to surface water bodies in groundwater baseflow. This pore water system may represent a natural bioreactor where anoxic and oxic biotransformation process act in synergy to reduce or even eliminate contaminant fluxes to surface water. Here, we critically review current process understanding of anaerobic CE respiration in the competitive framework of hyporheic zone biogeochemical cycling fuelled by in-situ fermentation of natural organic matter. We conceptualise anoxic-oxic interface development for metabolic and co-metabolic mineralisation by a range of aerobic bacteria with a focus on vinyl chloride degradation pathways. The superimposition of microbial metabolic processes occurring in sediment biofilms and bulk solute transport delivering reactants produces a scale dependence in contaminant transformation rates. Process interpretation is often confounded by the natural geological heterogeneity typical of most riverbed environments. We discuss insights from recent field experience of CE plumes discharging to surface water and present a range of practical monitoring technologies which address this inherent complexity at different spatial scales. Future research must address key dynamics which link supply of limiting reactants, residence times and microbial ecophysiology to better understand the natural attenuation capacity of hyporheic systems.

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