Journal Title
Title of Journal: Hydrogeol J
|
Abbravation: Hydrogeology Journal
|
Publisher
Springer-Verlag
|
|
|
|
Authors: Michiel Pronk Nico Goldscheider Jakob Zopfi
Publish Date: 2005/06/11
Volume: 14, Issue: 4, Pages: 473-484
Abstract
The dynamics of organic carbon OC turbidity faecal indicator bacteria and physicochemical parameters was studied in a karst system near Yverdon Switzerland Online measurements and sampling were done at a swallow hole draining an agricultural surface the input and two groups of springs the outputs that often show bacterial contamination A fluorescent tracer that was injected into the swallow hole during lowflow conditions first arrived at the springs 10–12 days after injection the total recovery rate was 29 Previous tracer tests during highflow conditions gave shorter travel times After a major rainfall event a primary turbidity peak was observed at the springs It coincides with the rising limb of the hydrograph indicating remobilisation of autochthonous particles from the aquifer A secondary turbidity peak occurs several days later suggesting the arrival of allochthonous particles from the swallow hole Wider peaks of OC and bacteria were observed simultaneously Applying methods from molecular microbiology PCRDGGE allowed characterisation of the bacterial communities at the swallow hole and the springs The results demonstrate that the swallow hole is an important source of groundwater contamination while its contribution to aquifer recharge is insignificant OC appears to be a better indicator for bacterial contamination than turbidityLa dynamique du carbone organique de la turbidité des bactéries indicatrices de contamination fécale et d’autres paramètres physicochimiques a été étudiée dans un système karstique proche de la ville d’YverdonlesBains Suisse Des mesures en continu ainsi que des échantillonnages ont été effectués à une perte drainant une zone agricole input et à deux groupes sourciers output qui montrent fréquemment une contamination bactérienne En période d’étiage un essai de traçage à l’uranine a été réalisé depuis la perte Le traceur est apparu aux sources 10–12 jours après l’injection la masse de restitution totale a été de 29 Des essais précédents réalisés en hautes eaux ont montré des temps de transit plus court Suite à un événement pluvieux important un pic de turbidité primaire synchrone avec l’augmentation du débit est observé aux sources indiquant une remobilisation des sédiments autochtones de l’aquifère Un pic de turbidité secondaire apparaît quelques jours plus tard aux sources suggérant l’arrivée de matériel allochtone de la perte Cette dernière est accompagnée de pics plus larges de carbone organique et des bactéries indicatrices de contamination fécale La microbiologie moléculaire PCRDGGE a permis la caractérisation des communautés bactériennes de la perte et des sources Ces résultats démontrent l’importante influence de la perte sur la qualité de l’eau souterraine alors que sa contribution au débit du système est négligeable Le carbone organique semble être un meilleur indicateur de la présence de contamination bactérienne que la turbiditéSe ha estudiado la dinámica del carbono orgánico turbiedad una bacteria indicadora de fecales y parámetros fisicoquímicos en un sistema kárstico cerca de Yverdon Suiza Se realizaron mediciones en línea y muestreo en un sumidero que drena una superficie agrícola la entrada y dos grupos de manantiales las salidas que frecuentemente muestran contaminación bacterial Un trazador fluorescente que se inyectó en el sumidero durante condiciones de flujo bajo arribó en los manantiales por vez primera 10–12 días después de que fue inyectado el ritmo total de recuperación fue de 29 Las pruebas de trazadores realizadas con anterioridad bajo condiciones de flujo alto aportaron tiempos de viaje más cortos Después de una tormenta fuerte se observó un pico de turbiedad primario en los manantiales El pico coincide con el limbo ascendente del hidrograma indicando remobilización de partículas alóctonas provenientes del acuífero Un pico de turbiedad secundario ocurre varios días más tarde sugiriendo el arribo de partículas alóctonas provenientes del sumidero Se observaron simultáneamente picos más amplios de carbono orgánico y bacteria La aplicación de métodos de microbiología molecular PCRDGGE permitieron caracterizar las comunidades de bacteria en el sumidero y los manantiales Los resultados demuestran que el sumidero es una fuente importante de contaminación de aguas subterráneas mientras que su contribución a la recarga del acuífero es insignificante El carbono orgánico parece ser un mejor indicador de contaminación bacterial que la turbiedadThe Energy Service of Yverdon SEY funded this study We are grateful to ClaudeOlivier Pelet Olivier Flückiger and Pierre Siegrist SEY for the good cooperation We thank Dr PierreAndré Schnegg for his outstanding field fluorometers MariEve Farine Vanessa Di Marzo and Ana Slijepceviv for laboratory work François Bourret for technical support and our trainee Xavier Drogue for testing the measuring devices We thank Pierre Gutzwiler SIGRIST Photometer AG for the good cooperation and MeteoSwiss for the precipitation data We thank the reviewers for their valuable comments and Dr David Drew for language corrections This study was carried out in order to prepare the BEKARST project subproject KARSTDYN dynamics of microbial communities organic carbon and particles in karst groundwater which is funded by the Swiss National Science Foundation since October 2004 Project No 200020105427
Keywords:
.
|
Other Papers In This Journal:
- Simulation of seawater intrusion into the Khan Yunis area of the Gaza Strip coastal aquifer
- Modelling groundwater flow of the Trifa aquifer, Morocco
- Competition between topography- and compaction-driven flow in a confined aquifer: Some analytical results
- Remediation scenarios for selenium contamination, Blackfoot watershed, southeast Idaho, USA
- Radiocarbon dating and the 36 Cl/Cl evolution of three Great Artesian Basin wells at Dalhousie, South Australia
- Influence of rainfall on the deformation and stability of a slope in overconsolidated clays: a case study
- Transport and deposition of suspended particles in saturated porous media: hydrodynamic effect
- Model of hydrological behaviour of the anthropized semiarid wetland of Las Tablas de Daimiel National Park (Spain) based on surface water–groundwater interactions
- Determination of hydraulic parameters of an unconfined alluvial aquifer by the floodwave-response technique
- A theoretical analysis of basin-scale groundwater temperature distribution
- Numerical modeling of stress-permeability coupling in rough fractures
- Using Hydrogeochemical Methods To Evaluate Complex Quaternary Subsurface Stratigraphy Block Island, Rhode Island, USA
- Karst groundwater: a challenge for new resources
- Evaluation of retention properties of a semi-synthetic fractured block from modelling at performance assessment time scales (Äspö Hard Rock Laboratory, Sweden)
- Groundwater management by riverbank filtration and an infiltration channel: the case of Obrenovac, Serbia
- Interactions between groundwater and surface water: the state of the science
- A hydrogeological conceptual approach to study urban groundwater flow in Bucharest city, Romania
- Groundwater recharge: an overview of processes and challenges
- Integrating hydraulic conductivity with biogeochemical gradients and microbial activity along river–groundwater exchange zones in a subtropical stream
- Is self-regulation a myth? Case study on Spanish groundwater user associations and the role of higher-level authorities
- Reply to comment on “Geochemical heterogeneity and isotope geochemistry of natural attenuation processes in a gasoline-contaminated aquifer at the Hnevice site, Czech Republic”: report published in Hydrogeology Journal (2007) 15: 961-976, by Barbora Topinkova, Kamil Nesetril, Josef Datel, Ondrej Nol, Petr Hosl
- Automatic estimation of aquifer parameters using long-term water supply pumping and injection records
- Book review: Groundwater around the World: A Geographic Synopsis, by Jean Margat and Jac van der Gun (CRC Press, 2013)
- Effect of sorption intensities on dispersivity and macro-dispersion coefficient in a single fracture with matrix diffusion
- The bailer test: a simple effective pumping test for assessing borehole success
- Groundwater resources in the Upper Guadiana Basin (Spain): a regional modelling analysis
- Evaluation of graphical and multivariate statistical methods for classification of water chemistry data
- Groundwater source assessment program for the state of Hawaii, USA: methodology and example application
- Thermal tracer testing in a sedimentary aquifer: field experiment (Lauswiesen, Germany) and numerical simulation
- Heterogeneous seepage at the Nopal I natural analogue site, Chihuahua, Mexico
- The role of faulting on surface deformation patterns from pumping-induced groundwater flow (Las Vegas Valley, USA)
- Investigating the influence of aquifer heterogeneity on the potential for thermal free convection in the Yarragadee Aquifer, Western Australia
- Effect of advective mass transfer on field scale fluid and solute movement: Field and modeling studies at a waste disposal site in fractured rock at Oak Ridge National Laboratory, Tennessee, USA
- The impact of intensive groundwater abstraction on recharge to a shallow regional aquifer system: evidence from Bangladesh
- Characterization of a Pleistocene thermal spring in Mozambique
- Ground truthing groundwater-recharge estimates derived from remotely sensed evapotranspiration: a case in South Australia
- Estimation of aquifer hydraulic parameters from surface geophysical measurements: a case study of the Upper Cretaceous aquifer, central Sinai, Egypt
- MODFLOW procedure to simulate axisymmetric flow in radially heterogeneous and layered aquifer systems
- Estimating groundwater recharge beneath irrigated farmland using environmental tracers fluoride, chloride and sulfate
- Effects of climate change on groundwater resources at Shelter Island, New York State, USA
- Simulated impacts of artificial groundwater recharge and discharge on the source area and source volume of an Atlantic Coastal Plain stream, Delaware, USA
- Investigating pesticide transport in the León-Chinandega aquifer, Nicaragua
- Simultaneous parameter identification of a heterogeneous aquifer system using artificial neural networks
- A conceptual approach for assessing the impact of climate change on groundwater and related surface waters in cold regions (Finland)
|