Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Adaptations that Reduce Water Loss

Adaptations that Reduce Water Loss

Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.

Quality of Water

Quality of Water

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...

Testing Water Quality

Testing Water Quality

When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...

Net Change Theorem

Net Change Theorem

The Net Change Theorem is a fundamental principle in calculus that establishes a direct relationship between a function’s rate of change and its accumulated change over an interval. Mathematically, it states that the definite integral of a function's derivative over a given interval [a,b] yields the net change in the original function:This theorem has significant applications in various real-world scenarios, including physics, economics, and engineering. A particularly useful application is in...

Sources of Food Contamination

Sources of Food Contamination

Contamination of food by microbial agents and natural toxins poses significant risks to public health. These hazards can be introduced at various points across the food supply chain, ranging from environmental sources to processing and storage stages. Understanding these contamination pathways is critical for developing strategies to ensure food safety.Seafood is particularly vulnerable to contamination through both environmental exposure and microbial colonization. Toxins from harmful algal...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Efficacy of urban road salt reduction strategies on public supply well quality.

The Science of the total environment·2023

Same author

Stimulating in situ denitrification in an aerobic, highly permeable municipal drinking water aquifer.

Journal of contaminant hydrology·2014

Same author

Substrate Interaction during Aerobic Biodegradation of Creosote-Related Compounds: A Factorial Batch Experiment.

Environmental science & technology·2011

Same author

Applications and implications of direct groundwater velocity measurement at the centimetre scale.

Journal of contaminant hydrology·2011

Same author

On the use of mean groundwater age, life expectancy and capture probability for defining aquifer vulnerability and time-of-travel zones for source water protection.

Journal of contaminant hydrology·2011

Same author

High-pressure injection of dissolved oxygen for hydrocarbon remediation in a fractured dolostone aquifer.

Journal of contaminant hydrology·2010

Search research articles

Related Experiment Video

Updated: Jul 12, 2026

Watershed Planning within a Quantitative Scenario Analysis Framework

Watershed Planning within a Quantitative Scenario Analysis Framework

Published on: July 24, 2016

Well vulnerability: a quantitative approach for source water protection.

E O Frind¹, J W Molson, D L Rudolph

¹Department of Earth Sciences, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1.

|September 12, 2006

Summary

This study introduces a quantitative method to assess well vulnerability in complex groundwater systems. It provides water managers with advanced tools for developing robust wellhead protection strategies.

More Related Videos

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

Published on: November 13, 2017

VirWaTest, A Point-of-Use Method for the Detection of Viruses in Water Samples

VirWaTest, A Point-of-Use Method for the Detection of Viruses in Water Samples

Published on: May 11, 2019

Related Experiment Videos

Last Updated: Jul 12, 2026

Watershed Planning within a Quantitative Scenario Analysis Framework

Watershed Planning within a Quantitative Scenario Analysis Framework

Published on: July 24, 2016

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

Published on: November 13, 2017

VirWaTest, A Point-of-Use Method for the Detection of Viruses in Water Samples

VirWaTest, A Point-of-Use Method for the Detection of Viruses in Water Samples

Published on: May 11, 2019

Area of Science:

Hydrogeology
Environmental Science
Water Resource Management

Background:

Assessing drinking water source vulnerability is crucial for public health.
Conventional wellhead protection often lacks quantitative measures for complex groundwater systems.

Purpose of the Study:

To develop a quantitative approach for assessing well vulnerability in complex three-dimensional groundwater systems.
To provide relative measures of intrinsic well vulnerability, including contaminant arrival times and concentration reduction.

Main Methods:

Utilized adjoint theory combined with forward- and backward-in-time transport modeling.
Employed a standard numerical flow and transport code for analysis.
Focused on the relative expected impact of potential contaminant sources within a well capture zone.

Main Results:

Developed quantitative measures of well vulnerability beyond traditional advective travel times.
Included expected contaminant arrival times, dispersion-related concentration reduction, time to breach quality objectives, and exposure times.
Demonstrated the methodology on a complex glacial multiaquifer system in Ontario.

Conclusions:

The new approach offers a more physically based and quantitative method for wellhead protection.
Enhances water managers' ability to develop effective strategies for safeguarding drinking water sources.
Provides critical insights into the expected impact of potential contamination events.