World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Estimation of Forest Structure Metrics Relevant to Hydrologic Modelling Using Coordinate Transformation of Airborne Laser Scanning Data : Volume 16, Issue 10 (23/10/2012)

By Varhola, A.

Click here to view

Book Id: WPLBN0004010570
Format Type: PDF Article :
File Size: Pages 18
Reproduction Date: 2015

Title: Estimation of Forest Structure Metrics Relevant to Hydrologic Modelling Using Coordinate Transformation of Airborne Laser Scanning Data : Volume 16, Issue 10 (23/10/2012)  
Author: Varhola, A.
Volume: Vol. 16, Issue 10
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Teti, P., Coops, N. C., Frazer, G. W., & Varhola, A. (2012). Estimation of Forest Structure Metrics Relevant to Hydrologic Modelling Using Coordinate Transformation of Airborne Laser Scanning Data : Volume 16, Issue 10 (23/10/2012). Retrieved from http://hawaiilibrary.net/


Description
Description: Department of Forest Resources Management, University of British Columbia, 2231-2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada. An accurate characterisation of the complex and heterogeneous forest architecture is necessary to parameterise physically-based hydrologic models that simulate precipitation interception, energy fluxes and water dynamics. While hemispherical photography has become a popular method to obtain a number of forest canopy structure metrics relevant to these processes, image acquisition is field-intensive and, therefore, difficult to apply across the landscape. In contrast, airborne laser scanning (ALS) is a remote-sensing technique increasingly used to acquire detailed information on the spatial structure of forest canopies over large, continuous areas. This study presents a novel methodology to calibrate ALS data with in situ optical hemispherical camera images to obtain traditional forest structure and solar radiation metrics. The approach minimises geometrical differences between these two techniques by transforming the Cartesian coordinates of ALS data to generate synthetic images with a polar projection directly comparable to optical photography. We demonstrate how these new coordinate-transformed ALS metrics, along with additional standard ALS variables, can be used as predictors in multiple linear regression approaches to estimate forest structure and solar radiation indices at any individual location within the extent of an ALS transect. We expect this approach to substantially reduce fieldwork costs, broaden sampling design possibilities, and improve the spatial representation of forest structure metrics directly relevant to parameterising fully-distributed hydrologic models.

Summary
Estimation of forest structure metrics relevant to hydrologic modelling using coordinate transformation of airborne laser scanning data

Excerpt
Bater, C. W., Wulder, M., Coops, N. C., Nelson, R. F., Hilker, T., and Næsset, E.: Stability of sample-based scanning-LiDAR-derived vegetation metrics for forest monitoring, IEEE T. Geosci. Remote, 49, 2385–239, 2011.; Bewley, D., Alila, Y., and Varhola, A.: Variability of snow water equivalent and snow energetics across a large catchment subject to Mountain Pine Beetle infestation and rapid salvage logging, J. Hydrol., 388, 464–479, 2010.; Boon, S.: Snow ablation energy balance in a dead forest stand, Hydrol. Process., 23, 2600–2610, 2009.; Bréda, N. J.: Ground-based measurements of leaf area index: a review of methods, instruments and current controversies, J. Exp. Bot., 54, 2403–2417, 2003.; Chen, J. M., Rich, P. M., Gower, S. T., Norman, J. M., and Plummer, S.: Leaf area index of boreal forests: Theory, techniques, and measurements, J. Geophys. Res., 102, 29429–29443, 1997.; Côté, J.-F., Widlowski, J.-L., Fournier, R., and Verstraete, M. M.: The structural and radiative consistency of three-dimensional tree reconstructions from terrestrial lidar, Remote Sens. Environ., 113, 1067–1081, 2009.; Coops, N. C., Smith, M. L., Jacobsen, K. L., Martin, M., and Ollinger, S.: Estimation of plant and leaf area index using three techniques in a mature native eucalypt canopy, Austral Ecol., 29, 332–341, 2004.; Coops, N. C., Varhola, A., Bater, C. W., Teti, P., and Boon, S.: Assessing differences in tree and stand structure following beetle infestation using LiDAR data, Can. J. Remote Sens., 35, 497–508, 2009.; Danson, F. M., Hetherington, D., Morsdorf, F., Koetz, B., and Allgöwer, B.: Forest canopy gap fraction from terrestrial laser scanning, IEEE Geosci. Remote S., 4, 157–160, 2007.; Ellis, C. R. and Pomeroy, J. W.: Estimating sub-canopy shortwave irradiance to melting snow on forested slopes, Hydrol. Process., 21, 2581–2593, 2007.; Ellis, C. R., Pomeroy, J. W., Brown, T., and MacDonald, J.: Simulation of snow accumulation and melt in needleleaf forest environments, Hydrol. Earth Syst. Sci., 14, 925–940, doi:10.5194/hess-14-925-2010, 2010.; Ellis, C. R., Pomeroy, J. W., Essery, R. L. H., and Link, T. E.: Effects of needleleaf forest cover on radiation and snowmelt dynamics in the Canadian Rocky Mountains, Can. J. Forest Res., 41, 608–620, 2011.; Field, A.: Discovering Statistics using SPSS, Sage Publications, 779 pp., 2005.; Essery, R., Bunting, P., Hardy, J. P., Link, T., Marks, D., Melloh, R., Pomeroy, J. W., Rowlands, A., and Rutter, N.: Radiative transfer modelling of a coniferous canopy characterised by airborne remote sensing, J. Hydrometeorol., 9, 228–242, 2007.; Frazer, G. W., Canham, C. D., and Lertzman, K. P.: Gap Light Analyzer (GLA), Version 2.0: Imaging software to extract canopy structure and gap light transmission indices from true-colour fisheye photographs, users manual and program documentation. Simon Fraser University/Institute of Ecosystem Studies, Burnaby, BC/Millbrook, NY, 1999.; Frazer, G. W., Fournier, R. A., Trofymow, J. A., and Hall, R. J.: A comparison of digital and film fisheye photography for analysis of forest canopy structure and gap light transmission, Agr. Forest Meteorol., 109, 249–263, 2001.; Goodwin, N., Coops, N. C., and Culvenor, D. S.: Assessment of forest structure with airborne LiDAR and the effects of platform altitude, Remote Sens. Environ., 103, 140–152, 2006.; Hanssen, K. H. and Solberg, S.: Assessment of defoliation during a pine sawfly outbreak: Calibration of airborne laser scanning data with hemispherical photography, Forest Ecol. Manag., 250, 9–16, 2007.; Hardy, J. P., Melloh, R., Koenig, G., Marks, D., Winstral, A., Pomeroy, J. W., and Link, T.: Solar radiation transmission through conifer canopies, Agr. Forest Meteorol., 126, 257–270, 2004.; Hilker, T., van Leeuwen, M., Coops, N. C., Wulder, M. A., Newnham, G. J., Jupp, D. L. B., and Culvenor, D.: Comparing canopy metrics derived from terrestrial and airbor

 

Click To View

Additional Books


  • Testing the Realism of a Topography-driv... (by )
  • Physically-based Modelling of Hydrologic... (by )
  • Groundwater as an Emergency Source for D... (by )
  • Influence of Solar Forcing, Climate Vari... (by )
  • A View of Water Quality from the Plynlim... (by )
  • Improving Uncertainty Estimation in Urba... (by )
  • Hess Opinions: from Response Units to Fu... (by )
  • Improving Runoff Estimates from Regional... (by )
  • Future Changes in Flash Flood Frequency ... (by )
  • Effects of Intersite Dependence of Neste... (by )
  • What Can Flux Tracking Teach US About Wa... (by )
  • Climate Information Based Streamflow and... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii 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.