NDLI: The diagnostic plot analysis of artesian aquifers with case studies in Table Mountain Group of South Africa

Content Provider	Springer Nature Link
Author	Sun, Xiaobin Xu, Yongxin Lin, Lixiang
Copyright Year	2014
Abstract	Parameter estimates of artesian aquifers where piezometric head is above ground level are largely made through free-flowing and recovery tests. The straight-line method proposed by Jacob-Lohman is often used for interpretation of flow rate measured at flowing artesian boreholes. However, the approach fails to interpret the free-flowing test data from two artesian boreholes in the fractured-rock aquifer in Table Mountain Group (TMG) of South Africa. The diagnostic plot method using the reciprocal rate derivative is adapted to evaluate the artesian aquifer properties. The variation of the derivative helps not only identify flow regimes and discern the boundary conditions, but also facilitates conceptualization of the aquifer system and selection of an appropriate model for data interpretation later on. Test data from two free-flowing tests conducted in different sites in TMG are analysed using the diagnostic plot method. Based on the results, conceptual models and appropriate approaches are developed to evaluate the aquifer properties. The advantages and limitations of using the diagnostic plot method on free-flowing test data are discussed.Les estimations des paramètres des aquifères artésiens, où la charge hydraulique est au-dessus du niveau du sol, sont largement réalisées au moyen d’essais de pompage en écoulement libre et de suivi de la remontée. La méthode de la droite proposée par Jacob-Lohman est souvent utilisée pour l’interprétation du débit mesuré au niveau de forages artésiens en écoulement. Cependant, l’approche ne parvient pas à interpréter les données d’un essai en écoulement libre réalisé au sein de deux forages artésiens de l’aquifère fracturé du groupe de la Montagne de la Table (TMG) en Afrique du Sud. La méthode du graphe de diagnostic utilisant la dérivée de l’inverse du débit est adaptée pour évaluer les propriétés de l’aquifère artésien. La variation de la dérivée aide non seulement à identifier les régimes d’écoulement et discerner les conditions aux limites, mais elle facilite aussi la conceptualisation du système aquifère et la sélection d’un modèle approprié pour l’interprétation ultérieure des données. Les données de deux essais en écoulement libre conduits en différents sites du TMG sont analysées en utilisant la méthode du graphe de diagnostic. Des modèles conceptuels et des approches appropriées sont développés sur la base de ces résultats, afin d’évaluer les propriétés des aquifères. Les avantages et limites de l’utilisation de la méthode du graphe de diagnostic pour les données d’essais en écoulement libre sont discutés.La estimación de los parámetros de acuíferos artesianos donde la carga piezométrica está por encima del nivel del terreno, en gran medida, son realizados a través de ensayos de flujo libre y recuperación. El método de la línea recta propuesto por Jacob-Lohman se usa a menudo para la interpretación de las medidas de caudal en las perforaciones artesianas. Sin embargo, el enfoque es equivocada para la interpretación de los datos de ensayos de flujo libre a partir de dos perforaciones artesianas en un acuífero de rocas fracturadas en el Table Mountain Group (TMG) de Sudáfrica. El diagnóstico por el método gráfico usando la derivada de la tasa recíproca se adapta para evaluar las propiedades del acuífero artesiano. La variación de la derivada ayuda no solamente a identificar el régimen de flujo y discernir las condiciones de los límites, sino también que facilita la conceptualización del sistema acuífero y la selección de un modelo apropiado para la interpretación posterior de los datos. Se analizan los datos de dos ensayos de flujo libre realizados en diferentes sitios en TMG usando el método gráfico de diagnóstico. En base a los resultados se desarrollan modelos conceptuales y enfoques apropiados para evaluar las propiedades del acuífero. Se discuten las ventajas y limitaciones de usar el método gráfico de diagnóstico en datos de ensayos de flujo libre.通过自流和恢复试验主要对压水头高于地面的自流含水层的参数进行了估算。Jacob-Lohman提出的直线法经常用于解译自流钻孔的流量。然而,该方法不能解译南非桌山山脉组断裂岩含水层中的自流试验数据。利用倒数率导数的诊断标绘方法适合评估自流含水层特性。导数变化不仅有助于确定水流动态、识别边界条件,而且还可以促进含水层的概念化及以后用于数据解译的合适模型的选择。对桌山山脉组不同地点进行的自流试验数据采用诊断标绘方法进行了分析。根据研究结果,开发了概念模型和适当方法用来评估含水层特性。探讨了分析自流试验数据所用的诊断标绘方法的优点和局限。A estimativa de parâmetros dos aquíferos artesianos onde os níveis piezométricos se encontram acima do nível do solo é, na maior parte das vezes, baseada nos caudais livres e em ensaios de recuperação. O método da linha reta proposto por Jacob-Lohman é muitas vezes usado para a interpretação da descarga medida em poços artesianos repuxantes. No entanto, a abordagem falha na interpretação dos dados do ensaio de caudal livre de dois poços artesianos no aquífero fraturado do Grupo de Table Mountain (GTM), na África do Sul. O método da projeção diagnóstica, que usa a derivada do recíproco do caudal, é adaptado para avaliar as propriedades do aquífero artesiano. A variação da derivada ajuda não só na identificação dos regimes de fluxo e no discernimento das condições de fronteira, como também facilita a concetualização do sistema aquífero e a seleção de um modelo adequado para a interpretação dos dados numa fase posterior. São analisados os dados de dois ensaios de caudal livre realizados em diferentes locais no GTM, usando o método da projeção diagnóstica. Com base nos resultados, são desenvolvidos modelos conceituais e abordagens adequadas para avaliar as propriedades do aquífero. São discutidas as vantagens e as limitações do uso do método da projeção diagnóstica com dados de ensaios de caudal livre.
Starting Page	567
Ending Page	579
Page Count	13
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	23
Issue Number	3
e-ISSN	14350157
Language	Portuguese
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-11-23
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Artesian aquifer Analytical solutions Reciprocal rate derivative Hydraulic properties South Africa Hydrogeology Hydrology/Water Resources Geology Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
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

A critical overview of transboundary aquifers shared by South Africa

Modelling water-table depth in a primary aquifer to identify potential wetland hydrogeomorphic settings on the northern Maputaland Coastal Plain, KwaZulu-Natal, South Africa

Transboundary aquifer mapping and management in Africa: a harmonised approach

Groundwater response to tidal fluctuations in wedge-shaped confined aquifers

Estimating hydraulic properties from tidal attenuation in the Northern Guam Lens Aquifer, territory of Guam, USA

The hydrogeology of the Condamine River Alluvial Aquifer, Australia: a critical assessment

The Great Artesian Basin: is it that great?

Aquifer design for freshwater storage and recovery in artificial islands and coastal expansions

Hydrogeological model of the Baltic Artesian Basin

The diagnostic plot analysis of artesian aquifers with case studies in Table Mountain Group of South Africa

Similar Documents

A critical overview of transboundary aquifers shared by South Africa

Modelling water-table depth in a primary aquifer to identify potential wetland hydrogeomorphic settings on the northern Maputaland Coastal Plain, KwaZulu-Natal, South Africa

Transboundary aquifer mapping and management in Africa: a harmonised approach

Groundwater response to tidal fluctuations in wedge-shaped confined aquifers

Estimating hydraulic properties from tidal attenuation in the Northern Guam Lens Aquifer, territory of Guam, USA

The hydrogeology of the Condamine River Alluvial Aquifer, Australia: a critical assessment

The Great Artesian Basin: is it that great?

Aquifer design for freshwater storage and recovery in artificial islands and coastal expansions

Hydrogeological model of the Baltic Artesian Basin

The diagnostic plot analysis of artesian aquifers with case studies in Table Mountain Group of South Africa