Geomorphic and Sedimentological Impact of the 2017 Flash Flood Event in the City of Comodoro Rivadavia (Central Patagonia, Argentina)

Paredes, José Matildo; Ocampo, Silvina Mariela; Foix, Nicolás; Olazábal, Sabrina Ximena; Valle, Mauro Nicolás; Montes, Alejandro; Allard, José Oscar

doi:10.1007/978-3-030-66161-8_1

Cited by 3 publications

(2 citation statements)

References 47 publications

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“…En general, los estudios científicos/técnicos han sido conducidos luego del paso de las crecidas, documentándose eventos extremos en el sur del Sinaí, Egipto (Kehew et al, 2010), en el este de Sudáfrica (Heritage et al, 2019) y el suroeste de los Estados Unidos (Costa y Jarret, 2008). En el contexto de Argentina, recientemente han ocurrido eventos extraordinarios en varios lugares de la región semiárida de Patagonia, afectando comunidades como Puerto Madryn (Bilmes et al, 2016), Comodoro Rivadavia (Paredes et al, 2021); el Valle Inferior del Río Chubut -VIRCh (Kaless et al, 2019a) y la meseta chubutense (Kaless et al, 2019b;Kaless et al, 2023). La cuantificación de la intensidad de dichos eventos resulta casi imposible de realizar durante el desarrollo del evento debido a su peligrosidad, ocurrencia en lugares remotos y baja duración.…”

Section: Introductionunclassified

Cuenca experimental Arroyo Sagmata

Kaless,

Frumento,

Malnero

et al. 2023

CURIHAM

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El Valle inferior del Río Chubut (VIRCh) es el lugar de asiento de la mitad de la población de la Provincia del Chubut (Argentina). Las lluvias ocasionales producen crecidas repentinas en los arroyos efímeros y pulsos de alta turbiedad en el Río Chubut que provocan el corte del suministro de agua potable a las poblaciones y riesgo de inundación. Con el objetivo de contar con información de campo de los procesos hidrológicos y de erosión de suelos, en el año 2017 se inició la instrumentación de una cuenca piloto de 129 km2 de extensión, denominada Cuenca Experimental Arroyo Sagmata (CEAS). Se presentan resultados para el periodo diciembre-2017 a febrero-2022. La lluvia media anual fue de 161 mm. No se observan variaciones estacionales en la precipitación y duración de las tormentas. Se registraron tres eventos con elevada intensidad en 10 min: 42, 45 y 63 mm/h. Durante el periodo se han registrado 17 eventos de crecidas, con un caudal máximo vertido en el Río Chubut de 34.6 m3/s. La concentración media de sedimentos transportados en suspensión por el flujo es de 33.4 g/l con un valor máximo registrado de 60.6 g/l. Los resultados presentados constituyen un aporte tanto al conocimiento de la hidrología regional como así también para la formulación de proyectos que garanticen la seguridad hídrica en el VIRCh.

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Section: Introductionunclassified

Cuenca experimental Arroyo Sagmata

Kaless,

Frumento,

Malnero

et al. 2023

CURIHAM

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“…One of the dominant types of disasters occurring in the territory of Indonesia are floods and flash floods, which cause a lot of material loss and casualties [1]. Flash floods have occurred several times in South Sulawesi, and the flash floodprone area is widely distributed in South Sulawesi and flash floods are one of the most destructive natural hazards, causing significant economic losses [2][3][4][5][6][7]. Flooding in the region is commonly caused by high-intensity storms that cause ephemeral watercourses to overflow [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Flood Sedimentology for Future Floods Mitigation in North Luwu, Sulawesi, Indonesia

et al. 2023

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A sedimentological study after the flash floods that hit North Luwu on July 13, 2020, has been carried out on three affected rivers, namely the Masamba River, the Radda River, and the Binuang River. The study aims to determine the sedimentological impact of the 2020 flash flood disaster, including sedimentation rate, annual bedload sediment volume, and total sediments, which will be used as a reference for future mitigation consideration. The study is based on fieldwork for data collection and laboratory analysis. The results of field measurements and laboratory analysis are then processed by calculating the sedimentation rate at the annual discharge, the bedload sediment volume, and the total estimated sediment accumulated by the flash flood. Sedimentation rate analysis was performed using the Ackers-White formula, and flood delineation was processed using HEC-RAS software. The climatological data from the climatology station at Andi Djemma Airport were used to calculate the river discharge. It is estimated that the volume of bedload sediment in the Binuang River is 16,194,168 m3/year, that of the Masamba River is 7,852,061 m3/year, and that of the Radda River is 4,003,011 m3/year. The volume of sediment brought by flash flood sedimentation in the Radda River is 9,141,608.39 m3, while that in the Masamba River is 55,131,761.29 m3, and that in the Binuang River is 136,838,603.61 m3. The total estimated sedimentation generated by the flash flood on the three rivers on July 13, 2020, is 222,476,966 m3. Based on the study, zonation for vulnerability levels is designed for a future mitigation scheme. The zonation can be classified into three zones: 1) the highly affected zone; 2) the moderately affected zone; and 3) the least affected zone, with special purposes in each zone. It is strongly recommended that future disaster settlement and infrastructure reconstruction policies be based on this zone to reduce disaster risk. Doi: 10.28991/CEJ-2023-09-04-011 Full Text: PDF

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Rainfall and Hydrograph Styles in Ephemeral Streams of the Drylands of Patagonia (South America–Argentina)

Kaless,

Malnero,

Frumento

et al. 2024

Water Resources Research

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Ephemeral streams in dry environments can convey high intensity sediment‐laden flash floods. The study of these events is quite difficult due to remote locations with limited accessibility, unexpected events, rough weather conditions and safety concerns. Hence combined data of rainfall and flood hydrograph is rather scarce in the world, and null in Patagonia‐South America. The Experimental Basin Arroyo Sagmata (total drained area of 129 km2), located in the Lower Valley of the Chubut River has been equipped with 4 rain gauges, and 4 time‐lapse cameras in four reaches of the arroyos. Data from a 4‐year monitoring provides valuable insights about the hydrological response of basins in the drylands of Patagonia, such as the time of response, the shape of hydrographs and its relation with the hyetographs. Four hydrograph styles have been observed: single‐peak (S), multi‐peaks (M), flat‐top (F) and compound (C) peaks. Rainfall styles have also been classified into single, multiple and compound. Soil processes operate reducing the number of peaks (M‐type hyetographs are transformed into S‐ or M‐type hydrographs). The rain structure is also important, especially when the high intensity occurs in the beginning of the event. Channel connectivity pattern and disconnections explain the observation of M‐type hydrograph and F‐type hydrograph, respectively.

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Geomorphic and Sedimentological Impact of the 2017 Flash Flood Event in the City of Comodoro Rivadavia (Central Patagonia, Argentina)

Cited by 3 publications

References 47 publications

Cuenca experimental Arroyo Sagmata

Cuenca experimental Arroyo Sagmata

Flood Sedimentology for Future Floods Mitigation in North Luwu, Sulawesi, Indonesia

Rainfall and Hydrograph Styles in Ephemeral Streams of the Drylands of Patagonia (South America–Argentina)

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