Morphological characterization of a highly-dynamic fluvial landscape: The River Baker (Chilean Patagonia)

Ulloa, Héctor; Mazzorana, Bruno; Batalla, Ramón J.; Jullian, Cristobal; Iribarren-Anacona, Pablo; Barrientos, Guillermo; Reid, Brian; Oyarzún, Carlos; Schaefer, Marius; Iroumé, Andrés

doi:10.1016/j.jsames.2018.06.002

Cited by 21 publications

(12 citation statements)

References 41 publications

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“…Moreover, the hierarchical nested approach followed in IDRAIM was also used for the morphological characterization of the River Baker, located in Chilean Patagonia [31].…”

Section: Introductionmentioning

confidence: 99%

Hydro-Morphological Assessment of Dittaino River, Eastern Sicily, Italy

Licciardello

Barbagallo

Muratore

et al. 2021

Water

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The present conditions of the Dittaino River were investigated by using tools addressing different components of the IDRAIM (stream hydro-morphological evaluation, analysis, and monitoring system) procedure. After the segmentation of the river, the Morphological Quality Index (MQI) and the Morphological Dynamic Index (MDI) were assessed to analyze its morphological quality and to classify the degree of channel dynamics related to progressive changes occurring in the relative long-term (i.e., 50–100 years), respectively. The results show that 45% and 22% of the analyzed reaches (mainly located in highest zones of the hydrographic network) were, respectively, of high and good quality. The MQI class decreased to good and then to moderate in the downstream direction, and two reaches were of poor class. The highest MDI classes were also mainly identified in the highest zones of the hydrographic network. Some limitations (i.e., the elevated number of indicators, as well as their simplification) and strengths (i.e., the easy applicability to a large number of reaches) were identified during the application of the MQI method to the Dittaino River.

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“…Moreover, the hierarchical nested approach followed in IDRAIM was also used for the morphological characterization of the River Baker, located in Chilean Patagonia [31].…”

Section: Introductionmentioning

confidence: 99%

Hydro-Morphological Assessment of Dittaino River, Eastern Sicily, Italy

Licciardello

Barbagallo

Muratore

et al. 2021

Water

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“…A temporal reversal via the Bayo River was proposed (Martinod et al, 2016) operating during the interval between 15,000 and 12,600 years BP (Bourgois et al, 2019). Catastrophic GLOF events have also occurred at this watershed (Ulloa et al, 2018;Thorndycraft et al, 2019;Bañales-Seguel et al, 2020). The reactivation of tectonic faults induced by the subduction of the Chile Ridge, mostly related to the Cachet and Exploradores fault zones, can explain these recent geomorphological changes (Agurto-Detzel et al, 2014;Georgieva et al, 2016).…”

Section: Discussionmentioning

confidence: 95%

“…Buenos Aires Lake system has been reported with the catastrophic flooding of the Baker River about 10,000 yrs BP (Thorndycraft et al, 2019;Davies et al, 2020). Other glacial lake outburst floods (GLOFs) have occurred recently along the Baker (Ulloa et al, 2018) and Exploradores rivers (Bañales-Seguel et al, 2020). Recent GLOFs are of special concern in relation to the historic mountain-glacier contributions to the sea level (Zemp et al, 2019) Several glaciolacustrine sequences have been reported along the Southern Andes of Patagonia and Tierra del Fuego from 40 to 54° S, although the altitudes and ages of these paleolakes are not similar.…”

Section: Discussionmentioning

confidence: 99%

Quaternary glaciolacustrine deposits around a Triple Junction site: Paleolakes at the foot of the Northern Patagonian Ice field (Argentina and Chile)

Isla

Espinosa

2021

andgeo

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The area involved by the triple junction between the South American, Nazca and Antarctic plates activity was affected by Quaternary glaciations. Before 12,800 yrs BP an extended ice field occupied the top of the Patagonian Andes, irradiating glaciers towards the east and the west dominantly. Towards the east, the ice melted in piedmont lakes; towards the west, fjords melted into the Pacific Ocean. The Upper-Pleistocene climate amelioration caused the recession of those glaciers. Some piedmont lakes reversed their Atlantic outflow towards to the Pacific Ocean. The glaciers retreat caused the fluvial reactivations along crustal former faults that were located below the ice. The Patagonian ice field became therefore split into present Northern and Southern fields. At the second largest lake of South America, the Buenos Aires-General Carrera Lake, the water level dropped from about 500 m over present mean sea level to 230 m. Several glaciolacustrine deposits from this area are indicating significant variations caused by climatic changes, volcanism and tectonics, differing in spatial and temporal magnitudes. The triple junction activity involved subduction of the Chile Ridge below the continental South American plate, volcanic activity and faulting. During the glacier melting the Baker River captured three eastern-moving glacial systems towards the southwest, towards the Pacific Ocean. This rapid event is thought to occur 12,800 yrs BP. The lowering of these glaciolacustrine systems should be also interpreted in terms of the tectonic activity in the region and considering other processes operating in the lakes and within the watersheds.

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“…In this section, we illustrate the test procedure already explained, applied now to the Baker River. Ulloa et al [43] presented a segmentation of 34 reaches. However, it is not appropriate for the purpose of comparison.…”

Section: Case Study B: the Baker Rivermentioning

confidence: 99%

“…For this reason, we did not use the Ulloa et al [43]'s segmentation for comparison purposes; instead, we proceeded as in the previous case study, by investigating whether some further reaches ("novelties") could be identified with respect to those generated by our proposed procedure once additional attributes were considered ( Figure 12). We start now with slope changes (considering the elevation of the VB along the axis of the active channel envelope).…”

Section: Case Study B: the Baker Rivermentioning

confidence: 99%

A Systematic, Automated Approach for River Segmentation Tested on the Magdalena River (Colombia) and the Baker River (Chile)

Nardini

Yépez

Mazzorana

et al. 2020

Water

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This paper proposes a systematic procedure to identify river reaches from a geomorphic point of view. Their identification traditionally relies on a subjective synthesis of multi-dimensional information (e.g., changes of slope, changes of width of valley bottom). We point out that some of the attributes adopted to describe geomorphic characters of a river (in particular sinuosity and confinement) depend on the length of reaches, while these latter are not yet identified; this is a source of ambiguity and introduces, at least conceptually, an unpleasant, implicit, iterative procedure. We introduce a new method which avoids this difficulty. Furthermore, it is simple, objective, and explicitly defined, and as such, it is automatable. The method requires to define and determine a set of intensive attributes, i.e., attributes that are independent of the segment length. The reaches are then identified by the intersection of the segmentations induced by such attributes. We applied the proposed procedure in two case studies, the Magdalena River (Colombia) and the Baker River (Chile), and investigated whether the adoption of the traditional approach for the definition of reaches would lead to a different result. We conclude that there would be no detectable differences. As such, the method can be considered an improvement in geomorphic river characterization.

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Morphological characterization of a highly-dynamic fluvial landscape: The River Baker (Chilean Patagonia)

Cited by 21 publications

References 41 publications

Hydro-Morphological Assessment of Dittaino River, Eastern Sicily, Italy

Hydro-Morphological Assessment of Dittaino River, Eastern Sicily, Italy

Quaternary glaciolacustrine deposits around a Triple Junction site: Paleolakes at the foot of the Northern Patagonian Ice field (Argentina and Chile)

A Systematic, Automated Approach for River Segmentation Tested on the Magdalena River (Colombia) and the Baker River (Chile)

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