NDLI: A time-series analysis framework for the flood-wave method to estimate groundwater model parameters

Content Provider	Springer Nature Link
Author	Obergfell, Christophe Bakker, Mark Maas, Kees
Copyright Year	2016
Abstract	The flood-wave method is implemented within the framework of time-series analysis to estimate aquifer parameters for use in a groundwater model. The resulting extended flood-wave method is applicable to situations where groundwater fluctuations are affected significantly by time-varying precipitation and evaporation. Response functions for time-series analysis are generated with an analytic groundwater model describing stream–aquifer interaction. Analytical response functions play the same role as the well function in a pumping test, which is to translate observed head variations into groundwater model parameters by means of a parsimonious model equation. An important difference as compared to the traditional flood-wave method and pumping tests is that aquifer parameters are inferred from the combined effects of precipitation, evaporation, and stream stage fluctuations. Naturally occurring fluctuations are separated in contributions from different stresses. The proposed method is illustrated with data collected near a lowland river in the Netherlands. Special emphasis is put on the interpretation of the streambed resistance. The resistance of the streambed is the result of stream-line contraction instead of a semi-pervious streambed, which is concluded through comparison with the head loss calculated with an analytical two-dimensional cross-section model.La méthode de l’onde de crue est appliquée dans le cadre d’une analyse de séries de niveaux piézométriques afin d’estimer des paramètres de modèles d’écoulement d’eau souterraine. La méthode qui en résulte est applicable dans des situations où les fluctuations de niveaux piézométriques à proximité d’un cours d’eau dépendent aussi de façon significative des régimes de précipitation et d’évaporation. Les fonctions de réponse dans l’analyse de séries de niveaux piézométriques sont générées par un modèle analytique d’écoulement d’eau souterraines décrivant les interactions entre un cours d’eau et un aquifère. Ces fonctions de réponse analytiques jouent le même rôle que les fonctions de réponse dans un essai de pompage, c’est à dire traduire les variations de niveaux piézométriques observées en termes de paramètres de modèle d’écoulement d’eau souterraine au moyen d’une expression analytique parcimonieuse. Une différence importante par rapport à la méthode de l’onde de crue traditionnelle et aux essais de pompage est que les paramètres du modèle d’écoulement d’eau souterraine sont inférés des effets combinés du régime de précipitation, d’évaporation et des fluctuations de niveau d’un cours d’eau. Les fluctuations de niveaux piézométriques naturelles sont séparées en contributions, chacune liée à une cause particulière. La méthode est illustrée en utilisant des niveaux piézométriques mesurés à proximité d’un cours d’eau de basse altitude aux Pays-Bas. Une attention particulière est prêtée à l’interprétation de la résistance à l’écoulement du lit du cours d’eau qui apparait être le résultat des courbures des lignes d’écoulement de l’eau souterraine et non pas de la présence d’un lit de cours d’eau peu perméable. Cette conclusion est tirée en calculant les pertes de hauteur piézométriques au moyen d’un modèle analytique dans un plan vertical en deux dimensions.El método de la onda de crecida se lleva a cabo en el marco del análisis de series de tiempo para estimar parámetros del acuífero para su uso en un modelo de agua subterránea. El método de la onda de crecida ampliada es aplicable a situaciones en que las fluctuaciones del agua subterránea están afectadas significativamente por la precipitación y la evaporación variables con el tiempo. Las funciones de respuesta para el análisis de las series de tiempo se generan con un modelo analítico de agua subterránea que describe la interacción agua superficial-acuífero. Las funciones de respuesta del análisis juegan el mismo papel que la función de pozo en un ensayo de bombeo, que es traducir las variaciones observadas en la carga hidráulica en los parámetros del modelo del agua subterránea por medio de una ecuación parsimoniosa del modelo. Una diferencia importante en comparación entre las pruebas de los métodos tradicionales de onda de crecida y las de bombeo del acuífero es que los parámetros se deducen de los efectos combinados de las fluctuaciones de la precipitación, la evaporación y el nivel de la corriente. Las fluctuaciones que ocurren naturalmente se separan de las contribuciones de diferentes cargas. El método propuesto se ilustra con los datos recogidos cerca de un río de tierras bajas en Holanda. Se pone especial énfasis en la interpretación de la resistencia en el lecho del río. La resistencia del lecho del río es el resultado de la contracción de la línea de la corriente en lugar de la capa semipermeable en el cauce del río, la cual se concluye mediante la comparación con la pérdida de carga hidráulica calculada en una sección transversal de un modelo analítico bidimensional.在时间序列分析框架内实施洪波法以估算地下水模型中的含水层参数。在地下水波动受到随时间变化的降水和蒸发显著影响的情况下,扩展的洪波法非常适用。生成了时间序列的响应函数,以及描述河流-含水层相互作用的解析地下水模型。解析响应函数与抽水实验中的井函数发挥着同样的作用,井函数通过简约的模型方程式将观测到的水头变化转换成地下水模型参数。与传统的洪波法和抽水实验相比,一个重要的差别就是含水层参数根据降水量、蒸发量和河流水位波动推断出来。从不同的压力中分离出自然出现的波动所占的比重。根据荷兰一个低地河流附近收集到的资料描述了所提出的方法。特别强调了河床阻力的解译。河床的阻力是河流线收缩造成的,而不是半渗透的河床造成的,这是通过与解析二维横断面模型计算出的水头损失进行比较得出的结论。O método da onda de inundação foi implementado dentro de uma abordagem de series temporais para estimar parâmetros de aquíferos para uso em modelos de águas subterrâneas. O método da onda de inundação estendido resultante é aplicável em situações onde as flutuações das águas subterrâneas são significativamente afetadas pela precipitação e evapotranspiração variante no tempo. Funções de resposta para séries temporais são geradas com um modelo analítico de águas subterrâneas descrevendo a interação rio-aquífero. Funções de resposta analíticas desempenham o mesmo papel que a função do poço em um teste de bombeamento, que é o de traduzir variações de carga piezométrica em parâmetros de modelos de águas subterrâneas pelo uso de uma equação de modelo parcimoniosa. Uma diferença importante quando comparado ao método da onda de inundação tradicional e testes de bombeamento é que os parâmetros do aquífero são inferidos pelo efeito combinado da precipitação, evapotranspiração e flutuações no nível do rio. Flutuações ocorridas naturalmente são separadas em contribuição por diferentes estresses. O método proposto é ilustrado com dados coletados próximos a um polder de rio nos Países Baixos. Ênfase especial é dedicada à interpretação da residência no leito do rio. A residência do leito do rio é resultado de uma contração da linha de fluxo ao invés de um leito de rio semipermeável, conclusão que foi feita através de comparação com a perda de carga calculada com um modelo bidimensional em transepto.
Starting Page	1807
Ending Page	1819
Page Count	13
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	24
Issue Number	7
e-ISSN	14350157
Language	Portuguese
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-06-29
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	The Netherlands Time series analysis Groundwater/surface-water relations Analytical solutions Numerical modeling Hydrogeology Hydrology/Water Resources Geology Water Quality/Water Pollution Geophysics/Geodesy 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

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