scholarly journals Satellite Technologies in Monitoring of Ecosystems

2015 ◽  
Vol 2 ◽  
pp. 60
Author(s):  
Nikolay Belyaev ◽  
Vasily Krupin ◽  
Evgeny Mikhalenko ◽  
Aleksandr Smirnov ◽  
Valentin Vilkevich ◽  
...  
Keyword(s):  
Water Surface ◽  
Field Data ◽  
Hydraulic Engineering ◽  
Relative Accuracy ◽  
Drainage Area ◽  
Area Measurement ◽  
Theoretical Base ◽  
Land Plot ◽  
Practical Research ◽  
Plot Area

<p class="R-AbstractKeywords"><span lang="EN-US">The article provides a description of modern geodetic devices, which are used to solve several problems connected with environmental and hydraulic engineering. In particular, a non-conventional method of area measurement for ecosystems monitoring, which involves the usage of satellite navigation devices, is considered. </span></p><p class="TTPParagraphothers"><span lang="EN-US">Nowadays electronic tachymeters, digital levelling instruments, laser scanning systems and satellite systems are widely used for implementation of geodetic engineering works. In full extent it could be also applied to different environmental and hydraulic engineering problems solution.</span></p><p class="TTPParagraphothers"><span lang="EN-US">The satellite navigators, especially with GPS+GLONASS system support, are the promising alternative to handle different planimetric tasks, particularly, water surface and drainage area measurement. </span></p><p class="TTPParagraphothers"><span lang="EN-US">The paper presents an analysis of the results of research carried out in 2012-2014 years and comparison of them with the new field data. Moreover the obtained results are compared with the theoretical values of quadrates’ areas and the dependence of the relative accuracy versus land plot area is built.</span></p><p class="TTPParagraphothers"><span lang="EN-US">Based on a practical research, the accuracy of the method is being estimated. The analysis of different measuring conditions and factors, regarding their effect on accuracy, is made. </span></p><p class="R-MainText"><span lang="EN-US">The suitable areas, where the method could be used, are mentioned. Particularly, the possibility of water surface and drainage area measuring is examined with the usage of previous theoretical base. </span></p><p class="TTPParagraphothers"><span lang="EN-US">The paper presents an analysis of the results of research carried out in 2012-2014 years and comparison of them with the new field data. Moreover the obtained results are compared with the theoretical values of quadrates’ areas and the dependence of the relative accuracy versus land plot area is built.</span></p><p class="TTPParagraphothers"><span lang="EN-US">Based on a practical research, the accuracy of the method is being estimated. The analysis of different measuring conditions and factors, regarding their effect on accuracy, is made. </span></p><p class="R-MainText"><span lang="EN-US">The suitable areas, where the method could be used, are mentioned. Particularly, the possibility of water surface and drainage area measuring is examined with the usage of previous theoretical base. </span></p>

Use of Laboratory and Field Data to Evaluate the Pier Scour Equation from Hydraulic Engineering Circular 18

2017 ◽  
Vol 2638 (1) ◽  
pp. 113-121
Author(s):  
Stephen T. Benedict ◽  
Thomas P. Knight
Keyword(s):  
South Carolina ◽  
Field Data ◽  
Field Measurements ◽  
The United States ◽  
Prediction Equation ◽  
Hydraulic Engineering ◽  
Bridge Engineering ◽  
Geological Survey ◽  
Pier Scour ◽  
Primary Focus

The Hydraulic Engineering Circular 18 (HEC-18) pier scour prediction equation is the most widely used pier scour prediction equation in the United States, if not the world, and understanding the equation’s performance is of interest to the bridge engineering community. Previous evaluations of the equation’s performance were limited to smaller sets of laboratory and field data. In 2014, the U.S. Geological Survey, in cooperation with the South Carolina Department of Transportation, published a U.S. Geological Survey pier scour database, consisting of 569 laboratory and 1,858 field measurements of pier scour. This extensive database is a valuable resource for evaluating the HEC-18 pier scour equation, which is the primary focus of the investigation presented in this paper. Although comparing predicted and measured values is a common method for evaluating the performance of a prediction equation, the present investigation used a different approach and evaluated the HEC-18 equation by comparing selected data from the USGS database with the dimensionless relationship used to develop the original equation. This alternative approach highlighted some of the strengths and weaknesses of the equation, which are not as evident in the more common approach of comparing predicted and measured values. The findings of the investigation are presented in this paper.

Three Dimensional Visualization Technologies for Water Conservancy Works

2012 ◽  
Vol 263-266 ◽  
pp. 1809-1812
Author(s):  
Nan Xie
Keyword(s):  
Field Data ◽  
3D Visualization ◽  
Three Dimensional ◽  
Interactive Visualization ◽  
Simulation System ◽  
Hydraulic Engineering ◽  
Visual Simulation ◽  
Complex Field ◽  
Water Conservancy ◽  
Visualization Techniques

The advances in the study of three dimensional (3D) interactive visualization techniques in hydraulic engineering are reviewed. Main contents, key technologies and the difficulties with their solutions in the application of 3D interactive visualization techniques to water conservancy works are analyzed and summarized. A true 3D visual simulation system prototype for large-scale water conservancy project was built. A framework for building 3D visual simulation system for complex field data in hydraulic engineering is presented to illustrate potentiality and effectiveness of 3D visualization techniques for hydraulic engineering. Aspects like navigation and presentations of complex field data with spatial dependence are presented.

scholarly journals Greater Water Surface Variability Revealed by New Congo River Field Data: Implications for Satellite Altimetry Measurements of Large Rivers

2019 ◽  
Vol 46 (14) ◽  
pp. 8093-8101 ◽  
Author(s):  
Andrew B. Carr ◽  
Mark A. Trigg ◽  
Raphael M. Tshimanga ◽  
Duncan J. Borman ◽  
Mark W. Smith
Keyword(s):  
Water Surface ◽  
Satellite Altimetry ◽  
Field Data ◽  
Large Rivers ◽  
Congo River ◽  
Surface Variability

Wind-induced turbulent heat and mass transfer over large bodies of water

1976 ◽  
Vol 77 (4) ◽  
pp. 645-664 ◽  
Author(s):  
C. Y. Shaw ◽  
Y. Lee
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Satisfactory Agreement ◽  
Water Surface ◽  
Field Data ◽  
Theoretical Study ◽  
Field Conditions ◽  
Turbulent Heat ◽  
Bodies Of Water ◽  
Principle Of Similarity

A semi-theoretical study has been made of the problem of stable turbulent heat and mass transfer between a water surface and surrounding atmosphere under the influence of wind. The equations derived are based on the principle of similarity and are therefore expected to be valid under both laboratory and field conditions. The predicted heat- and mass-transfer Stanton numbers appear to be in satisfactory agreement with the available field data.

scholarly journals ABOUT PLOT AREA DETERMINATION IN CASE OF REQUIRED COORDINATE SUPPORT DEFICIENCY

2021 ◽  
Vol 26 (3) ◽  
pp. 138-146
Author(s):  
Viktor N. Klyushnichenko ◽  
◽  
Gennady P. Martynov ◽  
Galina I. Yurina ◽  
◽  
...  
Keyword(s):  
Main Parameter ◽  
High Accuracy ◽  
Significant Part ◽  
Land Plot ◽  
Control Functions ◽  
Plot Area ◽  
The Given ◽  
Practical Recommendations ◽  
Area Determination

The article is devoted to the relevant problem of the adjustment of different-time and different-accuracy results of land plot coordination support which highly require cadastral registration. The most significant factor in the given case is the area of a land plot, which is its main parameter being taken into account in determination of type of permitted use, cadastral value, land tax and rent. Therefore, area determination requires rather high accuracy, in particular, for garden and vegetable garden plots. According to statistics the significant part of earlier registered land plots contains errors, that’s why there are often the cases when adjacent plots overlap or their area is determined obviously incorrectly. Such situations require solutions, which are based on repeated cadastral measurements with possible use of several options for determination of adjacent plots areas, which were considered in working formulas of Heron and Brahmagupta. The given formulas do not use land plot boundary points coor-dinates, that’s why they can perform some control functions in cases of repeated coordinate determi-nation in such situations. The result of the present research was the formulation and solution of the problem of clarifying the location of gardening land plots and summer cottages in general that were previously approximated to the locality. The results of cadastral activities characterized the essence and content of using the formulas of Geron and Brahmagupta for calculating the values of areas, an analysis is carried out and practical recommendations for their use are given.

Validation of measurements of land plot area using UAV imagery

2014 ◽  
Vol 33 ◽  
pp. 270-279 ◽  
Author(s):  
Francisco Javier Mesas-Carrascosa ◽  
María Dolores Notario-García ◽  
José Emilio Meroño de Larriva ◽  
Manuel Sánchez de la Orden ◽  
Alfonso García-Ferrer Porras
Keyword(s):  
Land Plot ◽  
Plot Area

scholarly journals Artificial land plot as a real estate object

2021 ◽  
Vol 3 ◽  
pp. 52-55
Author(s):  
V.A. Alexeev ◽  
Keyword(s):  
Real Estate ◽  
Hydraulic Engineering ◽  
Engineering Structure ◽  
Land Plot

The article deals with the concept of an artificial land plot and critically analyzes its legislative definition. The author establishes the correlation of the concepts ‘artificial land plot’, ‘artificial island’, ‘hydraulic engineering structure’. A proposal is made to eliminate the reference of an artificial land plot to constructions.

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