World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Water Surface and Velocity Measurement-river and Flume : Volume Xl-5, Issue 1 (06/06/2014)

By Chandler, J. H.

Click here to view

Book Id: WPLBN0004015189
Format Type: PDF Article :
File Size: Pages 6
Reproduction Date: 2015

Title: Water Surface and Velocity Measurement-river and Flume : Volume Xl-5, Issue 1 (06/06/2014)  
Author: Chandler, J. H.
Volume: Vol. XL-5, Issue 1
Language: English
Subject: Science, Isprs, International
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus Publications
Publication Date:
Publisher: Copernicus Publications, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Ferreira, E., Shiono, K., Wackrow, R., & Chandler, J. H. (2014). Water Surface and Velocity Measurement-river and Flume : Volume Xl-5, Issue 1 (06/06/2014). Retrieved from

Description: Dept. Civil and Building Engineering, Loughborough University, LE11 3TU, UK. Understanding the flow of water in natural watercourses has become increasingly important as climate change increases the incidence of extreme rainfall events which cause flooding. Vegetation in rivers and streams reduce water conveyance and natural vegetation plays a critical role in flood events which needs to be understood more fully. A funded project at Loughborough University is therefore examining the influence of vegetation upon water flow, requiring measurement of both the 3-D water surface and flow velocities. Experimental work therefore requires the measurement of water surface morphology and velocity (i.e. speed and direction) in a controlled laboratory environment using a flume but also needs to be adaptable to work in a real river.

Measuring the 3D topographic characteristics and velocity field of a flowing water surface is difficult and the purpose of this paper is to describe recent experimental work to achieve this. After reviewing past work in this area, the use of close range digital photogrammetry for capturing both the 3D water surface and surface velocity is described. The selected approach uses either two or three synchronised digital SLR cameras in combination with PhotoModeler for data processing, a commercial close range photogrammetric package. One critical aspect is the selection and distribution of appropriate floating marker points, which are critical if automated and appropriate measurement methods are to be used. Two distinct targeting approaches are available: either large and distinct specific floating markers or some fine material capable of providing appropriate texture. Initial work described in this paper uses specific marker points, which also provide the potential measuring surface velocity. The paper demonstrates that a high degree of measurement and marking automation is possible in a flume environment, where lighting influences can be highly controlled. When applied to a real river it is apparent that only lower degrees of automation are practicable. The study has demonstrated that although some automation is possible for point measurement, point matching needs to be manually guided in a natural environment where lighting cannot be controlled.

Water Surface and Velocity Measurement-River and Flume


Click To View

Additional Books

  • 3D Building Change Detection Using High ... (by )
  • Hybrid Automatic Building Interpretation... (by )
  • Burn Severity Mapping in Australia 2009 ... (by )
  • Basic Graduate Curricula of Gis Design i... (by )
  • Construction of a Geographical Database ... (by )
  • Forest Resource Management System by Sta... (by )
  • Geometric Properties of a Mechanical For... (by )
  • Pile Volume Measurement by Range Imaging... (by )
  • A 3D Social Platform for the Paths of Vi... (by )
  • Voxel-based Approach for Estimating Urba... (by )
  • Semantic Interpretation of Insar Estimat... (by )
  • Impact of Climate and Analysis of Desert... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.