{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,5]],"date-time":"2026-01-05T11:23:03Z","timestamp":1767612183342,"version":"build-2065373602"},"reference-count":19,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2021,2,27]],"date-time":"2021-02-27T00:00:00Z","timestamp":1614384000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Identifying precursor events that allow the timely forecasting of landslides, thereby enabling risk reduction, is inherently difficult. Here we present a novel, low cost, flow visualization technique using time-lapsed imagery (TLI) that allows real time analysis of slope movement. This approach is applied to the Rest and Be Thankful slope, Argyle, Scotland, where past debris flows have blocked the A83 or forced preemptive closure. TLI of the Rest and Be Thankful are taken from a fixed station, 28 mm lens, time lapse camera every 15 min. Imagery is filtered to counter the effects of misalignment from wind induced vibration of the camera, asymmetric lighting, and fog. Particle image velocimetry (PIV) algorithms are then run to produce slope movement velocity vectors. PIV generated vectors are automatically post-processed to separate vectors generated by slope movement from false positives generated by harsh environmental conditions. Results for images over a 20-day period indicated precursor slope movement initiated by a rainfall event, a period of quiescence for 10 days, followed by a large landslide failure during proceeding rainfall where over 3000 tons of sediment reached the road. Results suggest low cost, live streamed TLI and this novel PIV approach correctly detect and, importantly, report precursor slope movement, allowing early warning, effective management and landslide impact mitigation. Future applications of this technique will allow the development of an effective decision-making tool for asset management of the A83, reducing the risk to life of motorists. The technique can also be applied to other critical infrastructure sites, allowing hazard risk reduction.<\/jats:p>","DOI":"10.3390\/rs13050893","type":"journal-article","created":{"date-parts":[[2021,2,27]],"date-time":"2021-02-27T03:44:31Z","timestamp":1614397471000},"page":"893","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Low-Cost Automatic Slope Monitoring Using Vector Tracking Analyses on Live-Streamed Time-Lapse Imagery"],"prefix":"10.3390","volume":"13","author":[{"given":"Muhammad Waqas","family":"Khan","sequence":"first","affiliation":[{"name":"Engineering &amp; Environment, Northumbria University, Newcastle NE1 8ST, UK"}]},{"given":"Stuart","family":"Dunning","sequence":"additional","affiliation":[{"name":"Department of Geography, Newcastle University, Newcastle NE1 7RU, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6375-4956","authenticated-orcid":false,"given":"Rupert","family":"Bainbridge","sequence":"additional","affiliation":[{"name":"Department of Geography, Newcastle University, Newcastle NE1 7RU, UK"}]},{"given":"James","family":"Martin","sequence":"additional","affiliation":[{"name":"Engineering &amp; Environment, Northumbria University, Newcastle NE1 8ST, UK"}]},{"given":"Alejandro","family":"Diaz-Moreno","sequence":"additional","affiliation":[{"name":"Reynolds International Ltd., Suite 2, Broncoed House, Broncoed Business Park, Wrexham Road, Mold, Flintshire CH7 1HP, UK"}]},{"given":"Hamdi","family":"Torun","sequence":"additional","affiliation":[{"name":"Engineering &amp; Environment, Northumbria University, Newcastle NE1 8ST, UK"}]},{"given":"Nanlin","family":"Jin","sequence":"additional","affiliation":[{"name":"Engineering &amp; Environment, Northumbria University, Newcastle NE1 8ST, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4980-4080","authenticated-orcid":false,"given":"John","family":"Woodward","sequence":"additional","affiliation":[{"name":"Engineering &amp; Environment, Northumbria University, Newcastle NE1 8ST, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6507-6773","authenticated-orcid":false,"given":"Michael","family":"Lim","sequence":"additional","affiliation":[{"name":"Engineering &amp; Environment, Northumbria University, Newcastle NE1 8ST, UK"}]}],"member":"1968","published-online":{"date-parts":[[2021,2,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"227","DOI":"10.1016\/j.earscirev.2016.08.011","article-title":"Landslides in a changing climate","volume":"162","author":"Garianoab","year":"2016","journal-title":"Earth Sci. Rev."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"166","DOI":"10.1016\/j.proeps.2016.10.018","article-title":"Assessing the potential effects of climate changes on landslide phenomena affecting pyroclastic covers in Nocera area (Southern Italy)","volume":"16","author":"Reder","year":"2016","journal-title":"Procedia Earth Planet. Sci."},{"key":"ref_3","unstructured":"Williams, J., Rosser, N.J., Afana, A., and Hunter, G. (2013, January 25\u201327). Can full-waveform of terrestrial laser scanning enhance our ability to monitor rock slope failure?. Proceedings of the 2013 International Symposium on Slope Stability in Open Pit Mining and Civil Engineering, Brisbane, Australia."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"62","DOI":"10.1016\/j.geomorph.2019.03.014","article-title":"Combination of GNSS, satellite InSAR, and GBInSAR remote sensing monitoring to improve the understanding of a large landslide in high alpine environment","volume":"335","author":"Tofani","year":"2019","journal-title":"Geomorphology"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1753","DOI":"10.1109\/JSTARS.2015.2402290","article-title":"Early warning GBInSAR-based method for monitoring Volterra (Tuscany, Italy) city walls","volume":"8","author":"Pratesi","year":"2015","journal-title":"IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Mayinger, F., and Feldmann, O. (2001). Optical Measurements. Techniques and Applications. Optical Measurements: Techniques and Applications, Springer.","DOI":"10.1007\/978-3-642-56443-7"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"207","DOI":"10.14712\/23361980.2019.18","article-title":"Economic impacts of landslides and floods on a road network","volume":"54","author":"Winter","year":"2012","journal-title":"AUC Geogr."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"138","DOI":"10.1016\/j.pgeola.2020.02.007","article-title":"Glacial conditioning and paraglacial sediment reworking in Glen Croe (the Rest and be Thankful), western Scotland","volume":"131","author":"Finlayson","year":"2020","journal-title":"Proc. Geol. Assoc."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Sparkes, B., Dunning, S., Lim, M., and Winter, M.G. (2017). Characterisation of Recent Debris Flow Activity at the Rest and Be Thankful, Scotland, Workshop on World Landslide Forum. Advancing Culture of Living with Landslides.","DOI":"10.1007\/978-3-319-53483-1_8"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Brennen, C. (2005). Fundamentals of Multiphase Flow, Cambridge University Press.","DOI":"10.1017\/CBO9780511807169"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1427","DOI":"10.1088\/0957-0233\/8\/12\/007","article-title":"On the errors of digital particle image velocimetry","volume":"8","author":"Huang","year":"1997","journal-title":"Meas. Sci. Technol."},{"key":"ref_12","unstructured":"Thielicke, W. (2014). The Flapping Flight of Birds: Analysis and Application. [Ph.D. Thesis, University of Groningen]."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"685","DOI":"10.1088\/0957-0233\/11\/6\/311","article-title":"Standard images for particle-image velocimetry","volume":"11","author":"Okamoto","year":"2002","journal-title":"Meas. Sci. Technol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"463","DOI":"10.1007\/s10452-005-6567-z","article-title":"Basics and principles of particle image velocimetry (PIV) for mapping biogenic and biologically relevant flows","volume":"40","author":"Stamhuis","year":"2016","journal-title":"Aquat. Ecol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1007\/BF00384623","article-title":"Theory of cross-correlation analysis of PIV images","volume":"49","author":"Keane","year":"1992","journal-title":"Appl. Sci. Res."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Thielicke, W., and Stamhuis, E.J. (2014). PIVlab\u2014Towards user-friendly, affordable and accurate digital particle image velocimetry in MATLAB. J. Open Res. Softw., 2.","DOI":"10.5334\/jors.bl"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"355","DOI":"10.1016\/S0734-189X(87)80186-X","article-title":"Adaptive histogram equalization and its variations","volume":"39","author":"Pizer","year":"1987","journal-title":"Comput. Vis. Graph. Image Process."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"225","DOI":"10.1007\/s00348-006-0233-7","article-title":"Intensity Capping: A simple method to improve cross-correlation PIV results","volume":"42","author":"Shavit","year":"2007","journal-title":"Exp. Fluids"},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Maragos, P. (2009). The Essential Guide to Image Processing, Academic Press. Chapter 3: Morphological filters.","DOI":"10.1016\/B978-0-12-374457-9.00013-5"}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/13\/5\/893\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:29:47Z","timestamp":1760160587000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/13\/5\/893"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,2,27]]},"references-count":19,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2021,3]]}},"alternative-id":["rs13050893"],"URL":"https:\/\/doi.org\/10.3390\/rs13050893","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2021,2,27]]}}}