Estimation of aquifer parameters from residual drawdowns

Kambhammettu, B.V.N.P.; King, James P.

doi:10.1680/wama.2010.163.7.361

Cited by 2 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They showed that the drawdown-derivative analysis improves estimation of aquifer parameters and identification of different forms of heterogeneity. Kambhammettu and King [21] estimated the transmissivity and storage coefficient using a generalized MATLAB code with the conventional Levenberg-Marquardt algorithm. They considered the residual drawdowns measurements from a single observation well.…”

Section: Introductionmentioning

confidence: 99%

A Straight-Line Method for Analyzing Residual Drawdowns at an Observation Well

Çimen

2015

Mathematical Problems in Engineering

View full text Add to dashboard Cite

Determination of the hydraulic parameters (transmissivity and storage coefficients) of a confined aquifer is important for effective groundwater resources. For this purpose, the residual drawdowns have been in use to estimate the aquifer parameters by the classical Theis recovery method. The proposed method of this paper depends on a straight-line through the field data and it helps to calculate the parameters quickly without any need for long-term pumping data. It is based on the expansion series of the Theis well function by consideration of three terms, and this approach is valid for the dimensionless time factoru′=S′r2/4Tt′≤0.2. The method can be applied reliably to extensive and homogeneous confined aquifers resulting in different storage coefficients during the pumping and recovery periodsS≠S′. It presents a strength methodology for the parameters decision making from the residual data in the groundwater field of civil engineering.

show abstract

Section: Introductionmentioning

confidence: 99%

A Straight-Line Method for Analyzing Residual Drawdowns at an Observation Well

Çimen

2015

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…A number of stochastic optimisation tools are available to solve the nonlinear aquifer parameters using gradient-based techniques but also conventional stabilisation techniques. The paper by Kambhammettu and King (2010) demonstrates how to accelerate and stabilise the conventional Levenberg-Marquardt algorithm. A generalised Matlab code was developed to estimate the transmissivity and storage coefficient of the confined aquifer using residual drawdowns in an observation well.…”

mentioning

confidence: 99%

Editorial: Integrated modelling for regional water management

Yang¹

2010

Proceedings of the Institution of Civil Engineers - Water Manag

View full text Add to dashboard Cite

Integrated hydrological and hydrogeological modelling plays an important role in regional water management. Numerical modelling of the complicated components of the hydrological cycle and related quality characteristics can be an effective tool for decision support in water management. This is because some inherent mechanisms and system behaviours cannot easily be quantitatively measured and are not experimentally accessible in the systems of hydro-geo-atmospheres. The EU water framework directives introduced an innovative, integrated and holistic approach to the protection and management of water resources which requires integrated modelling approaches at catchment scale for its proper implementation (Yang and Wang, 2010).This issue of Water Management brings together recent progress and advances in the numerical modelling tools used to support water management. A number of interesting and novel numerical models are used to study precipitation that could provide useful input to other hydrological and hydrogeological models. Rainfall was also linked to flooding forecast by way of numerical models. Some of the papers presented in this issue extend further studies of hydrogeological modelling for parameter estimation, saline intrusion and density dependent finite difference modelling. These works provide integrated modelling approaches for precipitation, flooding and groundwater issues, not only in quantity but also for quality.In the first paper, Cao et al. (2010) present a new approach to determine the distributed threshold rainfall for flash flooding to support practical flood warning. It is built upon a 2D full hydrodynamic model incorporating rainfall, infiltration loss and boundary resistance. The numerical solution of the model was achieved by the second-order total-variation-diminishing version of the weighted-average-flux method along with the Harten-Lax-van Leer contact (HLLC) approximate Riemann solver for the homogeneous equations, and a Runge-Kutta scheme for the ordinary differential equations of the source terms. The applicability of the new approach is demonstrated as applied to real flash flooding-prone areas in Hunan Province, China. The threshold rainfall for flash flooding, resulting from rainfall of short durations, was quantified, which indicated a high risk of flash flooding in the local areas and prompted effective measures to avoid economic and social losses.Creating a harmony between hydraulic constructions and a natural water environment for people to live in is a very interesting issue for watershed management. Attempts to bring two conflicting viewpoints from hydraulic engineers and ecologists into reconciliation show the practical difficulties of such a harmony. In the paper by Chou et al. (2010) the concept of emergy is introduced and used to assess the contribution of natural environment to the human economic system. The authors applied the emergy synthesis in this paper as a tool to study the catchment management approach in Taiwan. The emergy contributions of a river at different ...

show abstract

Estimation of aquifer parameters from residual drawdowns

Cited by 2 publications

References 9 publications

A Straight-Line Method for Analyzing Residual Drawdowns at an Observation Well

A Straight-Line Method for Analyzing Residual Drawdowns at an Observation Well

Editorial: Integrated modelling for regional water management

Contact Info

Product

Resources

About