Accuracy and Precision of Well Casing Surveys and Water-Level Measurements and Their Impact on Water-Level Contour Maps

2009 ◽  
pp. 295-295-15 ◽  
Author(s):  
R Schalla ◽  
AK Lewis ◽  
DJ Bates
Keyword(s):  
Water Level ◽  
Contour Maps ◽  
Accuracy And Precision ◽  
Water Level Measurements ◽  
Water Level Contour

Using Synthetic Data and Artificial Wells to Teach the Construction and Use of Water Level Contour Maps

2008 ◽  
Vol 56 (4) ◽  
pp. 317-323
Author(s):  
Michael John Nicholl ◽  
Alexander Grigor Baron ◽  
Colin Robins ◽  
Joshua Boxell ◽  
Yuyu Lin
Keyword(s):  
Water Level ◽  
Synthetic Data ◽  
Contour Maps ◽  
Water Level Contour

3D modelling of the flow distribution in the delta of Lake Øyeren, Norway

2010 ◽  
Vol 41 (2) ◽  
pp. 92-103 ◽  
Author(s):  
Peggy Zinke ◽  
Nils Reidar Bøe Olsen ◽  
Jim Bogen ◽  
Nils Rüther
Keyword(s):  
Water Level ◽  
Cross Sections ◽  
Stokes Equations ◽  
Morphological Changes ◽  
Flow Distribution ◽  
Field Measurements ◽  
Navier Stokes ◽  
Error Sources ◽  
Navier Stokes Equations ◽  
Water Level Measurements

A 3D numerical model was used to compute the discharge distribution in the channel branches of Lake Øyeren's delta in Norway. The model solved the Navier–Stokes equations with the k–ɛ turbulence model on a 3D unstructured grid. The bathymetry dataset for the modelling had to be combined from different data sources. The results for three different flow situations in 1996 and 1997 showed a relative accuracy of the computed discharges within the range of 0 to±20% compared with field measurements taken by an ADCP at 13 cross sections of the distributary channels. The factors introducing the most error in the computed results are believed to be uncertainties concerning the bathymetry. A comparison between the computational results of the older morphology data from 1985–1990 and the model morphology from 1995–2004 indicated that morphological changes in this period had already had consequences for the flow distribution in some channels. Other important error sources were the inevitable use of averaged water level gradients because of unavailable water level measurements within the delta.

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