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Gully Geometry: What Are We Measuring? : Volume 2, Issue 1 (31/03/2015)

By Casalí, J.

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Book Id: WPLBN0004022335
Format Type: PDF Article :
File Size: Pages 13
Reproduction Date: 2015

Title: Gully Geometry: What Are We Measuring? : Volume 2, Issue 1 (31/03/2015)  
Author: Casalí, J.
Volume: Vol. 2, Issue 1
Language: English
Subject: Science, Soil, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Campo-Bescós, M. A., Giménez, R., & Casalí, J. (2015). Gully Geometry: What Are We Measuring? : Volume 2, Issue 1 (31/03/2015). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Projects and Rural Engineering, Public University of Navarre, Los Olivos Building, 31006 Pamplona, Spain. Many of the researches on (ephemeral) gully erosion comprise the determination of the geometry of these eroded channels specially width and depth. This is not a simple task due to uncertainty generated by the wide range of variability of gully cross-section shape found in the field. However in the literature this uncertainty is not recognized and then no criteria in the measurement procedure is indicated. The aim of this work is to make the researchers aware of the ambiguity that arises when characterizing the geometry of an ephemeral gully and similar eroded channels. Besides, a measurement protocol is proposed with the ultimate goal of pooling criteria in future works. It is suggested to characterize the geometry of a gully through its effective width and effective depth, which, together with its length, define an equivalent prismatic gully (EPG). The latter would facilitate the comparison between each other of different gullies.

Summary
Gully geometry: what are we measuring?

Excerpt
Evans, M. and Lindsay, J.: High resolution quantification of gully erosion in upland peatlands at the landscape scale, Earth Surf. Proc. Land., 35, 876–886, 2010.; Casalí, J., López, J. J., and Giráldez, J. V.: Ephemeral gully erosion in southern Navarra (Spain), Catena, 36, 65–84, 1999.; Campo, M. A., Flores-Cervantes, J. H., Bras, R. L., Casalí, J., and Giráldez, J. V.: Evaluation of a gully headcut retreat model using multitemporal aerial photographs and digital elevation models, J. Geophys. Res.-Earth, 118, 1–15, 2013.; Casalí, J., Loizu, J., Campo, M. A., De Santisteban, L. M., and Álvarez-Mozos, J.: Accuracy of methods for field assessment of rill and ephemeral gully erosion, Catena, 67, 128–138, 2006.; Castillo, C., Taguas, E. V., Zarco-Tejada, P., James, M. R., and Gómez, J. A.: The normalized topographic method: An automated procedure for gully mapping using GIS, Earth Surf. Proc. Land., 39, 2002–2015, 2014.; Foster, G. R.: Understanding ephemeral gully erosion, in: Soil Conservation, Assessing the National Resources Inventory 2. Committee on Conservation Needs and Opportunities, Board of Agriculture, National Research Council, National Academy Press, Washington: 90–125, 1986.; Gabet, E. J. and Bookter, A.: A morphometric analysis of gullies scoured by post-fire progressively bulked debris flows in southwest Montana, USA, Geomorphology, 96, 298–309, 2008.; Giménez, R., Marzolff, I., Campo, M. A., Seeger, M., Ries, J. B., Casalí, J., and Álvarez-Mozos, J.: Accuracy of high-resolution photogrammetric measurements of gullies with contrasting morphology, Earth Surf. Proc. Land., 34, 1915–1926, 2009.; Gordon, L. M., Bennett, S. J., Bingner, R. L., Theurer, F. D., and Alonso, C. V.: Simulating ephemeral gully erosion in AnnAGNPS, Transactions of the American Society of Agricultural and Biological Engineers, 50, 857–866, 2007.; Hutchinson, D. E. and Pritchard, H. W.: Resource conservation glossary, J. Soil Water Conserv., 31, 1–63, 1976.; Parker, C., Clifford, N. J., and Thorne, C. R.: Automatic delineation of functional river reach boundaries for river research and applications, River Res. Appl., 28, 1708–1725, 2012.; Soil Science Society of America: Glossary of Soil Science Terms, Soils Science Society of America, Madison, WI, available at: https://www.soils.org/publications/soils-glossary# (last access: 24 March 2015), 2015.; Thorne C. R., Zevenbergen, L. W., Grissinger, E. H., and Murphey, J. B.: Ephemeral gullies as sources of sediment, Proceedings of the Fourth Federal Interagency Sedimentation Conference, 1, 3.152–3.161, 1986.

 

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