scholarly journals The Actual Approximate Location of Governing Vessel 20

2021 ◽  
Vol 5 (11) ◽  
pp. 11-19
Author(s):  
Edward Frederick Block IV
Keyword(s):  
Approximate Location

Quantitative investigations of the hydraulic connection between a large reservoir and a buried valley aquifer in southern Alberta

2005 ◽  
Vol 42 (5) ◽  
pp. 1461-1473 ◽  
Author(s):  
B D Smerdon ◽  
C A Mendoza ◽  
A M McCann
Keyword(s):  
Groundwater Flow ◽  
Flow Model ◽  
Hydraulic Head ◽  
Water Levels ◽  
Groundwater Flow Model ◽  
Reservoir Level ◽  
Hydraulic Connection ◽  
Southern Alberta ◽  
Approximate Location ◽  
Pumping Rates

Quantitative investigations, including two aquifer tests and development of a three-dimensional (3D) groundwater flow model, were required to determine the hydraulic connection between an irrigation reservoir and a buried valley aquifer in southern Alberta. Evidence of seepage was detected in the buried valley aquifer 10 km east of the Pine Coulee reservoir at the onset of filling in 1999, when the reservoir level exceeded an elevation of 1035 m above sea level (a.s.l.). Concern for an increase in the local water table and the creation of artesian conditions in the aquifer prompted this study to determine the approximate location of a seepage window that appeared to be connecting the reservoir and aquifer. Observations of hydraulic head in the aquifer during the pumping tests revealed a barrier boundary when the reservoir level was at an elevation of 1035 m a.s.l. and a recharge boundary condition when the elevation exceeded 1039 m a.s.l. These data were used to calibrate a 3D groundwater flow model, which was needed to determine the hydraulic properties and approximate location of the leakage zone. The quantitative investigation showed that seepage likely occurred through the sideslopes of the flooded coulee, rather than through the low-permeability coulee floor sediments or the embankment dam. Further simulations illustrated the expected seepage rates at various reservoir supply levels and the pumping rates required for relief wells installed in the buried valley aquifer to maintain historic aquifer hydraulic head. A brief postanalysis indicated that the forecasted pumping rates were only 15% lower than have been required to maintain preconstruction water levels in the buried valley aquifer.Key words: dams, seepage analysis, groundwater modelling, buried valley aquifer, pumping test.

Detection of inhomogeneity by the observation of the surface of the material simulating biological tissues

2019 ◽  
Vol 15 (1) ◽  
Author(s):  
Barbara Kmiecik ◽  
Jerzy Detyna
Keyword(s):  
Biological Tissues ◽  
Material Surface ◽  
Pathological State ◽  
Butadiene Rubber ◽  
Test Results ◽  
Nitrile Butadiene Rubber ◽  
Tissue Phantoms ◽  
Approximate Location ◽  
Heterogeneous Tissue

Abstract This paper presents a research which involves the observation of the movement of points presented on a material surface under the influence of mechanical extortion. Tests were performed using two 15 mm silicone layers, one of which contained 1 mm thick elements of nitrile-butadiene rubber. Analysed materials were structurally heterogeneous tissue phantoms. Test results that were obtained indicated that the developed method allows detecting inhomogeneity and its approximate location, what may be used in pathological state prevention.

scholarly journals The Algorithm for Determining the Coordinates of a Point in Three-Dimensional Space by Using the Auxiliary Point

2013 ◽  
Vol 48 (4) ◽  
pp. 141-145 ◽  
Author(s):  
Bartlomiej Oszczak ◽  
Eliza Sitnik
Keyword(s):  
Fixed Point ◽  
Precise Measurement ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Satellite Navigation ◽  
Reference Points ◽  
Two Dimensional ◽  
Approximate Location ◽  
The Many ◽  
Three Dimensional Space

ABSTRACT During the process of satellite navigation, and also in the many tasks of classical positioning, we need to calculate the corrections to the initial (or approximate) location of the point using precise measurement of distances to the permanent points of reference (reference points). In this paper the authors have provided a way of developing Hausbrandt's equations, on the basis of which the exact coordinates of the point in two-dimensional space can be determined by using the computed correction to the coordinates of the auxiliary point. The authors developed generalised equations for threedimensional space introducing additional fixed point and have presented proof of derived formulas.

scholarly journals Coupled Dynamic–Thermodynamic Forcings during Tropical Cyclogenesis. Part II: Axisymmetric Experiments

2017 ◽  
Vol 74 (7) ◽  
pp. 2279-2291 ◽  
Author(s):  
Brian H. Tang
Keyword(s):  
Angular Momentum ◽  
Outer Region ◽  
Tropical Cyclogenesis ◽  
Radial Gradient ◽  
Central Piece ◽  
Approximate Location ◽  
Gross Moist Stability ◽  
Diagnostic Framework ◽  
Inner Region ◽  
Negative Difference

Abstract An ensemble of axisymmetric model experiments with simplified physics is used to evaluate the diagnostic framework presented in Part I. The central piece of the framework is understanding what causes decreases in the ratio of bulk differences of moist entropy over differences of angular momentum between two defined regions, the boundary between the two demarcating the approximate location of the emergence of the radius of maximum wind of the developing meso-beta-scale protovortex. Within a day before tropical cyclogenesis, the moist entropy forcing results in a decrease of this ratio. Net advective fluxes act to export moist entropy from the outer region and import moist entropy into the inner region, resulting in a positive radial gradient in gross moist stability that is maximized around the time of genesis. While surface moist entropy fluxes are needed for genesis to occur, they act synergistically with the net advective fluxes to decrease the ratio before and during genesis. Within a day after tropical cyclogenesis, surface moist entropy fluxes directly amplify the positive difference in moist entropy between the inner and outer regions, and radial fluxes of angular momentum reduce the magnitude of the negative difference in angular momentum between the inner and outer regions. Both of these processes act to reduce the ratio further. The framework highlights differences in processes occurring before, during, and after genesis as the meso-beta-scale protovortex develops and intensifies.

Least-cost pathway analysis and inter-regional interaction in the Göksu valley, Turkey

2008 ◽  
Vol 58 ◽  
pp. 87-102 ◽  
Author(s):  
James M.L. Newhard ◽  
Norm Levine ◽  
Allen Rutherford
Keyword(s):  
Recent Work ◽  
Research Design ◽  
Pathway Analysis ◽  
River Valley ◽  
Long Distance ◽  
Formal Testing ◽  
Anatolian Plateau ◽  
Regional Interaction ◽  
Approximate Location ◽  
Distance Communication

AbstractRecent work in the Göksu river valley has brought questions of long-distance communication routes to the forefront of discussion. The valley has been long regarded as a potential conduit from the Anatolian plateau to the Mediterranean, yet no formal testing as to whether it was geographically suited to this use has taken place. The discovery of the site of Çömlek Tepesi in the upper Göksu valley and work at Kilse Tepe south of Mut has given further weight to the idea that the valley served as a communication route at points in time, and has encouraged testing the notion that a route through the valley would be attractive based on geography. Computerised modelling using least-cost pathway analysis (LCPA) was used to test whether the Göksu valley could serve as a communication route, and if so, the approximate location of that route based upon geographical constraints. In this paper, the methods of LCPA are reviewed and an example of its use is presented. Advocated as an exploratory rather than explanatory technique, the application of LCPA in the Göksu valley has strengthened current assumptions about regional and extra-regional interaction and raised new questions that refined the project's research design.

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