NDLI: Identifying environmental impacts of underground construction

Content Provider	Springer Nature Link
Author	Attanayake, Premadasa M. Waterman, Matthew K.
Copyright Year	2006
Abstract	Dewatering of the groundwater resource and associated reduced flow of surface water features are potential negative impacts when constructing underground facilities. Little work has been done to develop methods for the early detection of environmental impacts on water resources where major underground construction is being undertaken. Recognizing this, prior to construction of two rock tunnels in the southwestern USA, a 3-year preconstruction program was implemented to monitor over 100 wells, springs, and streams in the project area that might be affected. This preconstruction monitoring phase has established data for a hydrologic reference which indicates a high degree of spatial and temporal variability. This variability must be accounted for when trying to identify construction-related impacts. The project area was subdivided into areas of similar characteristics based on geologic and hydrologic features. Measurements from features within each unit were then normalized and aggregated to derive a single representative flow parameter. This representative flow was then correlated to precipitation and major stream flow records to allow for a method of estimating unimpacted flow and groundwater levels during and after construction. Application of this method proved useful in determining and enabling a quick response to construction-related impacts.El drenaje de recursos de agua subterránea con la reducción asociada de flujo de agua superficial constituyen impactos potenciales negativos cuando se construyen instalaciones subterráneas. Se ha hecho poco trabajo para desarrollar métodos que permitan la detección temprana de impactos ambientales en los recursos hídricos donde se están desarrollando construcciones subterráneas grandes. Tomando esto en cuenta se implementó, con anticipación de tres años antes del inicio de la obra, un programa de monitoreo abarcando más de 100 pozos, manantiales, y arroyos, en el área donde se construirían dos túneles en roca en el suroeste de Estados Unidos. Esta fase de monitoreo en la etapa de pre-construcción estableció datos para un marco hidrológico el cual indica un alto grado de variabilidad temporal y espacial. Debe de explicarse esta variabilidad cuando se trata de identificar los impactos relacionados con la construcción. El área del proyecto se dividió en áreas de características similares en base a las características hidrológicas y geológicas. Se normalizaron las mediciones de ciertas características dentro de cada unidad y se agregaron para derivar un parámetro único de flujo representativo. Este flujo representativo se correlacionó con la lluvia y los registros de caudales de los ríos principales para estimar un método que permita calcular flujos sin impacto y niveles de agua subterránea durante y después de la construcción. La aplicación de este método mostró ser útil en determinar y permitir una respuesta rápida a impactos relacionados con la construcción.L’épuisement des ressources en eau souterraine et le phénomène conséquent de la baisse du régime des eaux de surface sont des impacts potentiels et négatifs lies à la construction souterraine. Peu d’études ont porté sur le développement de méthodes de détection des impacts environnementaux sur les ressources hydrologiques, lorsque de grandes constructions souterraines sont planifiées. Dés lors, avant la construction de deux tunnels dans la roche dans le Sud-Ouest des USA, un programme de pré construction sur trois ans, visant le suivi d’une centaine de puits, sources et cours d’eau, a été mis en place. Cette phase de surveillance précédant la construction, a permis d’établir un état de référence hydrologique révélant entre autre l’importance de la variabilité spatiale et temporelle. Cette variabilité doit être prise en compte lorsque l’on s’essaye à la définition des impacts. La zone d’étude a été subdivisée par entités présentant des caractéristiques géologiques et hydrologiques communs. Les mesures de ces différentes entités ont été ensuite normalisées et agrégées de manière à n’en sortir qu’un seul et unique paramètre d’écoulement. Cet écoulement représentatif a été corrélé aux enregistrements de débits et de précipitation, permettant la mise en place d’une méthode d’estimation de l’impact pendant et après la construction, sur les niveaux piézométriques et les débits. Il est prouvé que cette méthode est fort utile, apportant une réponse rapide à la caractérisation des impacts.
Starting Page	1160
Ending Page	1170
Page Count	11
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	14
Issue Number	7
e-ISSN	14350157
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-06-02
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Groundwater protection Environmental impact detection Underground excavation Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Geology Hydrogeology
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Water Science and Technology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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