XXII ISPRS Congress 2012: Technical Commission VIII

Shortis, M.; Shimoda, H.; Cho, K.

Bibliographic data

Multivolume work

Persistent identifier:: 1663813779

Title:: XXII ISPRS Congress 2012

Sub title:: Melbourne, Australia, 25 August-1 September 2012

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663813779

Language:: English

Additional Notes:: Kongress-Thema: Imaging a sustainable future

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1663822514

Title:: Technical Commission VIII

Scope:: 590 Seiten

Year of publication:: 2014

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663822514

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(39,B8)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.; Literaturangaben

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Shortis, M.; Shimoda, H.; Cho, K.

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [VIII/8: Land]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: GULLIES, GOOGLE EARTH AND THE GREAT BARRIER REEF: A REMOTE SENSING METHODOLOGY FOR MAPPING GULLIES OVER EXTENSIVE AREAS U. Gilad, R. Denham and D. Tindall

Document type:: Multivolume work

Structure type:: Chapter

-B8, 2012 in Hamburg for ign, to I. Lange 21 as all further jon of the bus ank the NASA k H. Peng and arning Group at ; O. Conrad and International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B8, 2012 XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia GULLIES, GOOGLE EARTH AND THE GREAT BARRIER REEF: A REMOTE SENSING METHODOLOGY FOR MAPPING GULLIES OVER EXTENSIVE AREAS U. Gilad, R. Denham and D. Tindall Remote Sensing Centre, Queensland Dept. of Environment and Resource Management, ESP, GPO Box 2454, Brisbane, QLD, 4001, Australia - (uri.gilad, robert.denham, dan.tindall)@derm.qld.gov.au KEY WORDS: Environment, Geomorphology, Mapping, GIS, Prediction, Modelling, Imagery ABSTRACT: Recent work suggests that gully erosion is the main contributor of sediments to the Great Barrier Reef, Australia. The objectives of this study were to identify the location of gullies as well as the landscape characteristics associated with gully presence in the Burdekin Catchment. Data were collected by random sampling using Google Earth. A spatial-statistical analysis allowed the exclusion of areas where gullies were less likely to be present. The remaining gully sensitive areas were then manually mapped by using Google Earth, assisting in the creation of a predictive map. A semi-quantitative gully presence map was also created by visually inspecting imagery at 5 km x 5 km grid cell scale. Results show a strong relationship between gully presence and drainage features, low tree cover and low slopes. The resulting predictive map has correctly allocated more than 90% of gullies within less than 20% of the Burdekin’s area, yet uncertainties still remain. The manually derived mapping product comprises the most comprehensive gully data available for the Burdekin, while the high-resolution predictive map and the 5 km x 5 km grid map will allow better targeting of gullied areas in later stages of this research. This study also provides a methodology that can be applied to mapping gullies over extensive areas. It demonstrates how Google Earth could be used as a reliable platform for mapping gullies and discusses the limitations in the use of remotely sensed data for gully mapping and modelling. 1. INTODUCTION Until recently, hillslope erosion was thought to be the dominant contributor of sediments to the Great Barrier Reef (GBR). However, recent work is challenging this assumption, with suggestions that in some subcatchments most of the sediment load is being derived from gully erosion (Bartley et al., 2007). Evidence also suggests that fine sediment particles are of most concern to reef water quality and significant amounts of these are derived from gullies. Consequently, it is important to know where gullies occur in the contributing catchments, as well as to identify the types of landscapes and environmental factors that are associated with gully formation. In the last few years efforts have focused on the Burdekin Catchment (130,000 km?), the fifth largest river catchment in Australia (Bartley et al., 2007) which is the largest contributor of sediments to the Reef. The Remote Sensing Centre of the Queensland Department of Environment and Resource Management, supported by the QScape program, has been undertaking this study aiming to identify the location of gullies and the environmental conditions associated with gully formation in the Burdekin Catchment. 2. STUDY AREA The Burdekin Catchment in central Queensland, Australia, covers 130,000 km? consisting of almost a third of the total Reef drainage area (Figure 1). The climate of the Burdekin is defined as dry-tropical, ranging between 500-1500mm a year (Dight, 2009). The most prevalent land use is grazing which accounts for about 90% of the sediments and nutrients exported to the reef (Brodie et al., 2003). At the heart of the catchment is the Burdekin Falls Dam which captures about 60% of the sediments that reach the Lake Dalrymple during flood events (Bainbridge et al., 2008). The dam's location and ability to trap sediments reduces the volume of sediments that arrive from above the dam to only about 20% of the total sediment load that is exported from the catchment. The remaining 80% of the load is being transported from the river systems below the dam, in particular the Bowen and Broken rivers (Figure 1). Burdekin Catchment (above dam) RASE Burdekin Catchment (below dam) | Other GBR catchment Non:GBR catchment GBR Marine Park SÉ» Lake Dalrymple E Figure 1. Queensland catchments and the Great Barrier Reef Marine Park boundary.

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