Glacial and periglacial geomorphology and its paleoclimatological significance in three North Ethiopian Mountains, including a detailed geomorphological map

Hendrickx, Hanne; Jacob, Miró; Frankl, Amaury; Nyssen, Jan

doi:10.1016/j.geomorph.2015.05.005

Cited by 10 publications

(5 citation statements)

References 36 publications

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“…Field mapping in July 2018 and 2019, following the methodology of Hedding (2008), coupled with spatial data (DSMs, hillshade and orthophotos) of the terrain generated from the UAV images satellite imagery enabled the identification of talus, glacial and glaciofluvial relief forms. Symbols in the resultant geomorphological maps were adapted from Hendrickx et al (2015) and Kneisel et al (1998) and moraines were classified according to the descriptions presented by Schomacker (2011).…”

Section: Methodsmentioning

confidence: 99%

Geomorphological processes and landforms of glacier forelands in the upper Aktru River basin (Gornyi Altai), Russia: evidence for rapid recent retreat and paraglacial adjustment

et al. 2020

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The glaciers in the Aktru River basin of Gornyi Altai, Russia currently represent some of the fastest receding glaciers in the world. Formation of the morainic complexes closest to the contemporary glaciers in the Aktru River basin took place during the 17th -18th centuries with recession commencing at the end of the 18th century. Coupled with this glacial retreat, earth surface processes and vegetation succession are responding to shape the glacier forelands. This article presents the first geomorphological maps for the upper reaches of the Aktru River basin and focuses on the geomorphological landforms that occur in the rapidly changing glacier forelands. Geomorphological mapping is difficult in steep mountainous regions and, thus, mapping was completed using satellite imagery, field mapping and observations coupled with highresolution aerial photography obtained from Unmanned Aerial Vehicles (UAVs). Critical steps of the procedure used to process UAV imagery and difficulties encountered in this mountainous terrain are noted. The acquired spatial data enable the mapping and classification of small-scale transient geomorphological features such as talus, glacial and glaciofluvial landforms. Their dynamics provide insights into supraglacial and subglacial processes of the glaciers of the Aktru River basin and subsequent paraglacial adjustment. The presented highresolution spatial data, which can also be obtained at high temporal resolutions in the future, can act as a reference frame for geomorphologists and ecologists studying the temporal evolution of glacier forelands of the Aktru River basin during paraglacial adjustment and subsequent colonisation and stabilisation by biota.

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Section: Methodsmentioning

confidence: 99%

Geomorphological processes and landforms of glacier forelands in the upper Aktru River basin (Gornyi Altai), Russia: evidence for rapid recent retreat and paraglacial adjustment

et al. 2020

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“…Altitudes range from 1549 to 3140 m asl (Table 1). Even at the highest elevations, no frost occurs and no glacial or periglacial activity occurred during the Pleistocene (Hendrickx et al, 2015). Catchment slopes are generally very steep, ranging from 0.27 to 0.65 m m −1 .…”

Section: The Study Areamentioning

confidence: 99%

Sediment flux dynamics as fingerprints of catchment rehabilitation: The case of western Rift Valley escarpment of northern Ethiopia

et al. 2015

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“…The elevation of the catchments ranges from 1549 to 3140 m a.s.l., and the average catchment slope gradient ranges from 0.27 to 0.65 m m -1 . Even at the highest elevations, no frost occurs and there was no glacial or periglacial activity during the Pleistocene (Hendrickx et al, 2015).The escarpment drains towards the east and ephemeral mountain streams turn into braided river systems when reaching the Raya graben floor (Billi, 2007;Biadgilgn et al, 2015) ( Figure 2).…”

Section: Lithology and Geomorphologymentioning

confidence: 99%

Regreening of the Northern Ethiopian Mountains: Effects on Flooding and on Water Balance

Asfaha

Meyere

Frankl

et al. 2019

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The hydro-geomorphology of mountain catchments is mainly determined by vegetation cover. This study was carried out to analyse the impact of vegetation cover dynamics on flooding and water balance in 11 steep (0.27-0.65 m m -1 ) catchments of the western Rift Valley escarpment of Northern Ethiopia, an area that experienced severe deforestation and degradation until the first half of the 1980s and considerable reforestation thereafter. Land cover change analysis was carried out using aerial photos (1936,1965 and 1986) and Google Earth imaging (2005 and 2014). Peak discharge heights of 332 events and the median diameter of the 10 coarsest bedload particles (Max 10 ) moved in each event in three rainy seasons (2012-2014) were monitored. The result indicates a strong reduction in flooding (R 2 = 0.85, P<0.01) and bedload sediment supply (R 2 = 0.58, P<0.05) with increasing vegetation cover. Overall, this study demonstrates that in reforesting steep tropical mountain catchments, magnitude of flooding, water balance and bedload movement is strongly determined by vegetation cover dynamics.

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Glacial and periglacial geomorphology and its paleoclimatological significance in three North Ethiopian Mountains, including a detailed geomorphological map

Cited by 10 publications

References 36 publications

Geomorphological processes and landforms of glacier forelands in the upper Aktru River basin (Gornyi Altai), Russia: evidence for rapid recent retreat and paraglacial adjustment

Geomorphological processes and landforms of glacier forelands in the upper Aktru River basin (Gornyi Altai), Russia: evidence for rapid recent retreat and paraglacial adjustment

Sediment flux dynamics as fingerprints of catchment rehabilitation: The case of western Rift Valley escarpment of northern Ethiopia

Regreening of the Northern Ethiopian Mountains: Effects on Flooding and on Water Balance

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