NDLI: The protection of groundwater dependent ecosystems in Otago, New Zealand

Content Provider	Springer Nature Link
Author	Bekesi, Gabor Hodges, Sean
Copyright Year	2006
Abstract	Surface waters (streams, rivers, and wetlands) are the most important groundwater dependent ecosystems (GDEs) in Otago, New Zealand. Pumping wells in the vicinity can deplete water in the GDE. In Otago, most of the surface water resources are allocated and a method, which would assist in the implementation of water management policy, is needed to acknowledge the strong hydraulic link between surface and shallow groundwater. A simplified method has been developed which derives a numerical relationship between the bore pumping rate and the distance between the bore and surface water body beyond which depletion is considered insignificant. A range of GDE depletion scenarios are examined at various combinations of hydraulic parameters to find a minimum distance for a given pumping rate, at which 90% of the modelled surface water depletion scenarios become less than a threshold GDE depletion after a specified time. A buffer zone, based on the minimum distance is placed around GDEs, and groundwater abstraction rights within the buffer are subject to stricter rules. Applicants wishing to abstract from bores within the buffer zone will need to address the environmental impact of the proposed activity on the GDE.Les eaux de surface (cours d’eau et zones humides) sont les plus importants écosystèmes dépendants des eaux souterraines (GDEs) in Otago en Nouvelle Zélande. Les puits de pompage les plus proches peuvent diminuer la quantité d’eau des GDEs. En Otago, la plus part des eaux de surface sont allouées et une méthode spécifique est nécessaire pour reconnaître le lien hydraulique fort entre eaux de surface et souterraine et appuyer une politique de gestion des eaux. Une méthode simplifiée a été développée, sous la forme d’une relation numérique entre le pompage d’un puits et la distance de ce puits à la zone humide, distance pour laquelle le prélèvement est considéré comme insignifiant. Plusieurs types de scénarios d’impacts sur les GDEs ont été examinés suivant différentes combinaisons de paramètres hydrauliques, conduisant à une distance minimum pour un débit de pompage donné pour lequel 90 % des eaux de surface modélisées subissent un épuisement seuil après un temps déterminé. Une zone tampon, basée sur la distance minimum est placée autour des GDEs, et le droit au prélèvement d’eau souterraine dans cette zone est sujet à des règles strictes. Les candidats au prélèvement dans la zone tampon devront définir les impacts de leur activité proposée sur les GDEs.Las aguas superficiales (ríos, arroyos, y humedales) son los ecosistemas dependientes de agua subterránea (GDEs) más importantes en Otago, Nueva Zelandia. El bombeo de pozos en la región puede agotar el agua en los GDEs. La mayor parte de los recursos hídricos superficiales en Otago ya están asignados y se necesita un método que permita reconocer el fuerte vínculo hidráulico entre el agua superficial y el agua subterránea somera y que pueda apoyar la implementación de una política de manejo hídrico. Se ha desarrollado un método simplificado que aporta una relación numérica entre el ritmo de bombeo en el pozo y la distancia entre el pozo y el cuerpo de agua superficial, más alla de la cual el agotamiento se considera insignificante. Se ha examinado un rango de escenarios de agotamiento de GDEs con varias combinaciones de parámetros hidráulicos para encontrar la distancia minima para una tasa de bombeo dada a la cual el 90% de los escenarios de agotamiento de agua superficial modelada llegan a ser menores a un valor normal de fondo de agotamiento GDE después de un tiempo especificado. Una zona de amortiguamiento basada en la distancia mínima se coloca alrededor de los GDEs y los derechos de explotación de aguas subterráneas dentro de la zona de amortiguamiento están sujetos a reglas estrictas. Los aplicantes que deseen extraer agua de pozos emplazados en la zona de amortiguamiento necesitarán elaborar el estudio de impacto ambiental de la actividad propuesta en el GDE.
Starting Page	1696
Ending Page	1701
Page Count	6
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	14
Issue Number	8
e-ISSN	14350157
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-07-29
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Groundwater flow Stream depletion Groundwater/surface-water relations Groundwater dependent ecosystems (GDE) 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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