NDLI: Stream-aquifer interactions in the Maules Creek catchment, Namoi Valley, New South Wales, Australia

Content Provider	Springer Nature Link
Author	Andersen, Martin S. Acworth, R. I.
Copyright Year	2009
Abstract	The interaction between surface-water streams and groundwater in the Maules Creek catchment of northern New South Wales, Australia has been investigated using a wide range of techniques. Zones of groundwater discharge were mapped by measuring the temperature and fluid electrical-conductivity distribution in bores and surface water. Zones where surface water appears to be recharging the aquifer were investigated by measuring the vertical head gradient between the stream and adjacent bores and by estimates of the decreasing surface flow. Geological heterogeneity appears to be the most significant factor in controlling exchange. Lithological information was assembled using geophysical logging of existing bores, supplemented by the results of electrical resistivity imaging. A preliminary water balance was assembled from the available State records of groundwater abstraction for irrigation, rainfall, evapotranspiration and flow gauging in Maules Creek and the adjacent Namoi River. The analysis has demonstrated the complexity of these coupled systems and gives an indication of the most efficient techniques to be deployed in the field to investigate these complex but important systems.L’interaction entre cours d’eau de surface et nappe du captage de Maules Creek, Nord de la Nouvelle-Galles du Sud, Australie, a été étudiée en utilisant une large gamme de techniques. Les zones d’émergence de la nappe ont été cartographiées à l’aide de la distribution de la température et de la conductivité électrique de l’eau en sondage et en surface. Les zones de recharge de l’aquifère par de l’eau de surface ont été étudiées en mesurant le gradient hydraulique vertical entre le cours d’eau et les forages voisins et par estimation de la diminution du débit en surface. L’hétérogènéité des formations apparaît comme étant le principal facteur contrôlant les échanges. Les informations sur la lithologie ont été acquises par diagraphies dans les forages existants et complétées par imagerie électrique. Un premier bilan a été établi à partir des données de l’Etat sur les prèvements d’eau souterraine pour l’irrigation, la hauteur des pluies, l’évapotranspiration et le jaugeage des débits de Maules Creek et de la rivière Namoi voisine. L’analyse a montré la complexité de ces systèmes interdépendants et donne une indication sur les techniques les plus efficaces à mettre en œuvre sur le terrain pour comprendre ces systèmes complexes mais importants.Se ha investigado la interacción entre los cursos de aguas superficiales y el agua subterránea en la cuenca del Maules Creek del norte de Nueva Gales del Sur, Australia usando una amplia variedad de técnicas. Se mapearon las zonas de descarga de las aguas subterráneas midiendo la distribución de la temperatura y de la conductividad eléctrica del fluido en pozos y aguas superficiales. Las zonas donde las aguas superficiales están recargando al acuífero fueron investigadas midiendo del gradiente vertical de carga vertical entre los cursos de agua y los pozos adyacentes, estimando el flujo superficial decreciente. La heterogeneidad geológica aparece como el factor más significativo en el control del intercambio. Se ensambló la información litológica usando perfilajes geofísicos de pozos existentes, suplementado por los resultados del procesamiento de imágenes de resistividad eléctrica. Un balance de agua preliminar fue ensamblado a partir de los registros oficiales disponibles de la extracción de aguas subterráneas para riego, precipitaciones, evapotranspiración y mediciones de flujo en el Maules Creek, y en el adyacente Río Namoi. El análisis ha demostrado la complejidad de estos sistemas acoplados y da una indicación de las técnicas más eficientes a ser desplegadas en el campo para investigar estos complejos pero importantes sistemas.应用多种方法研究了澳大利亚新南威尔士北部Maules Creek流域河流和地下水之间的相互作用。通过测量井孔和地表水的温度和流体电导率分布绘出了地下水排泄区。通过测量河流与邻近钻孔的垂向水头梯度, 及计算地面径流量损失研究了地表水补给含水层的区域。地质非均质性似为控制水量交换的最主要因素。通过已有钻孔的地球物理测井, 辅以电阻率成像结果整理了岩性资料。通过可用的政府档案, 包括用于灌溉的地下水抽水量、降雨量、蒸发-蒸腾量和Maules Creek和邻近的Namoi河的测流量, 做了初步的水量均衡计算。分析表明这一耦合系统相当复杂, 并就如何在区域上研究这一复杂且重要的系统给出了最有效方法。A interacção entre a água superficial dos rios e a água subterrânea na bacia do Rio Maules, no norte de Nova Gales do Sul, Austrália, tem sido investigada usando uma grande variedade de técnicas. Foram mapeadas zonas de descarga de água subterrânea, através da medição e da análise da distribuição da temperatura e da condutividade eléctrica em furos e em água superficial. As zonas em que a água superficial parece estar a recarregar o aquífero foram investigadas medindo o gradiente hidráulico vertical entre o rio e os furos adjacentes e pela estimativa do decréscimo do fluxo superficial. As heterogeneidades geológicas parecem ser o factor mais significativo no controlo destas trocas. Foram reunidas informações sobre a litologia, a partir de perfis geofísicos realizados em furos existentes complementadas por resultados de perfis de resistividade eléctrica. Foi esboçado um balanço hidrológico preliminar, a partir dos registos disponíveis no Estado relativos às extracções de água subterrânea para a rega, à precipitação, à evapotranspiração e ao caudal medido nos rios Maules e Namoi, que lhe é adjacente. A análise evidenciou a complexidade destes sistemas associados e deu uma indicação sobre as técnicas mais eficientes a serem empregues no campo para estudar estes sistemas complexos, mas importantes.
Starting Page	2005
Ending Page	2021
Page Count	17
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	17
Issue Number	8
e-ISSN	14350157
Language	Portuguese
Publisher	Springer-Verlag
Publisher Date	2009-08-12
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Groundwater/surface-water relations General hydrogeology Geophysical methods Groundwater recharge/water budget Australia 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

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