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Articoli di riviste sul tema "Aggradation"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 10 marzo 2023

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1

Nikic, Zoran, Ratko Ristic, Nenad Maric, Vukasin Milcanovic, Sinisa Polovina, and Ivan Malusevic. "Function of check dam aggradation in local water supply of mountainous areas." Bulletin of the Faculty of Forestry, no. 120 (2019): 117–30. http://dx.doi.org/10.2298/gsf1920117n.

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Check dams are built to control erosion processes and torrential floods. In Serbia, legally binding documents, VOS (2002) and PPRS (2010), provide the concept for the water supply of the population and industry by regional systems for which water is provided by building high dams and formation of reservoirs. With this concept, it is often not possible to meet the needs of local communities in mountainous areas. In order to contribute to solving the water supply problems of these mostly poor villages, research was conducted on the possibility of using check dam aggradation groundwater for this

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2

Johnson, Peggy A., Richard D. Hey, Michael W. Horst, and Amanda J. Hess. "Aggradation at Bridges." Journal of Hydraulic Engineering 127, no. 2 (February 2001): 154–57. http://dx.doi.org/10.1061/(asce)0733-9429(2001)127:2(154).

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3

Alappat, Linto, Palaniandy Seralathan, Anil Shukla, Kyth Thrivikramji, and Ashok Singhvi. "Chronology of red dune aggradations of South India and its Palaeo-environmental significance." Geochronometria 40, no. 4 (December 1, 2013): 274–82. http://dx.doi.org/10.2478/s13386-013-0118-5.

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Abstract Red sand dunes occur in the coastal plains of south east and west of Tamil Nadu, India between the coordinates of 8°00′ to 9°30′ N; 77°18′ to 79° 00′ E. OSL dating of these sands indicated aggradations between ∼16-9 ka and ∼9-3 ka in the west and east coasts respectively. Dating results from inland red dunes at the foothills of Western Ghats show a break in deposition at ∼6 ka and aggradation since ∼2 ka. The sand aggradations in the west coast occurred during the transition period when SW monsoon in the area was reestablishing. The dunes attained their stability by 9 ka. In the coast

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4

Treat, Claire C., and Miriam C. Jones. "Near-surface permafrost aggradation in Northern Hemisphere peatlands shows regional and global trends during the past 6000 years." Holocene 28, no. 6 (January 19, 2018): 998–1010. http://dx.doi.org/10.1177/0959683617752858.

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The history of permafrost aggradation and thaw in northern peatlands can serve as an indicator of regional climatic history in regions where records are sparse. We infer regional trends in the timing of permafrost aggradation and thaw in North American and Eurasian peatland ecosystems based on plant macrofossils and peat properties using existing peat core records from more than 250 cores. Results indicate that permafrost was continuously present in peatlands during the last 6000 years in some present-day continuous permafrost zones and formed after 6000 BP in peatlands in the isolated to disc

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5

Humlum, Ole. "Holocene permafrost aggradation in Svalbard." Geological Society, London, Special Publications 242, no. 1 (2005): 119–29. http://dx.doi.org/10.1144/gsl.sp.2005.242.01.11.

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6

Vandermaelen, Nathan, Koen Beerten, François Clapuyt, Marcus Christl, and Veerle Vanacker. "Constraining the aggradation mode of Pleistocene river deposits based on cosmogenic radionuclide depth profiling and numerical modelling." Geochronology 4, no. 2 (December 15, 2022): 713–30. http://dx.doi.org/10.5194/gchron-4-713-2022.

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Abstract. Pleistocene braided-river deposits commonly represent long periods of non-deposition or erosion that are interrupted by rapid and short aggradation phases. When dating these sedimentary sequences with in situ-produced cosmic radionuclides (CRNs), simple concentration depth profiling approaches often fall short, as they assume that the alluvial sedimentary sequence has been deposited with a constant and rapid aggradation rate and been exposed to cosmic radiations afterwards. Numerical modelling of the evolution of CRNs in alluvial sequences permits one to account for aggradation, non-

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7

Pelletier, J. D. "The linkage between hillslope vegetation changes and late-Quaternary fluvial-system aggradation in the Mojave Desert revisited." Earth Surface Dynamics Discussions 2, no. 1 (March 24, 2014): 181–213. http://dx.doi.org/10.5194/esurfd-2-181-2014.

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Abstract. Valley-floor-channel and alluvial-fan deposits and terraces in the southwestern US record multiple episodes of late Quaternary fluvial aggradation and incision. Perhaps the most well constrained of these episodes took place from the latest Pleistocene to the present in the Mojave Desert. One hypothesis for this episode, i.e. the paleo-vegetation change hypothesis (PVCH), posits that a reduction in hillslope vegetation cover associated with the transition from Pleistocene woodlands to Holocene desert scrub generated a pulse of sediment that triggered a primary phase of aggradation dow

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8

Pelletier, J. D. "The linkages among hillslope-vegetation changes, elevation, and the timing of late-Quaternary fluvial-system aggradation in the Mojave Desert revisited." Earth Surface Dynamics 2, no. 2 (August 21, 2014): 455–68. http://dx.doi.org/10.5194/esurf-2-455-2014.

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Abstract. Valley-floor-channel and alluvial-fan deposits and terraces in the southwestern US record multiple episodes of late-Quaternary fluvial-system aggradation and incision. Perhaps the most well-constrained of these episodes took place from the latest Pleistocene to the present in the Mojave Desert. One hypothesis for this episode – i.e., the paleovegetation-change hypothesis (PVCH) – posits that a reduction in hillslope vegetation cover associated with the transition from Pleistocene woodlands to Holocene desert scrub generated a pulse of sediment that triggered a primary phase of aggrad

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9

Tamang, Sagar Kumar, Wenjun Song, Xing Fang, Jose Vasconcelos, and J. Brian Anderson. "Framework for quantifying flow and sediment yield to diagnose and solve the aggradation problem of an ungauged catchment." Proceedings of the International Association of Hydrological Sciences 379 (June 5, 2018): 131–38. http://dx.doi.org/10.5194/piahs-379-131-2018.

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Abstract. Estimating sediment deposition in a stream, a standard procedure for dealing with aggradation problem is complicated in an ungauged catchment due to the absence of necessary flow data. A serious aggradation problem within an ungauged catchment in Alabama, USA, blocked the conveyance of a bridge, reducing the clearance under the bridge from several feet to a couple of inches. A study of historical aerial imageries showed deforestation in the catchment by a significant amount over a period consistent with the first identification of the problem. To further diagnose the aggradation prob

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10

Hereford, Richard. "Modern Alluvial History of the Paria Rver Drainage Basin, Southern Utah." Quaternary Research 25, no. 3 (May 1986): 293–311. http://dx.doi.org/10.1016/0033-5894(86)90003-7.

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Stream channels in the Paria River basin were eroded and partially refilled between 1883 and 1980. Basin-wide erosion began in 1883; channels were fully entrenched and widened by 1890. This erosion occurred during the well-documented period of arroyo cutting in the Southwest. Photographs of the Paria River channel taken between 1918 and 1940 show that the channel did not have a floodplain and remained wide and deep until the early 1940s. A thin bar (<50 cm), now reworked and locally preserved, was deposited at that time. Basin-wide aggradation, which began in the early 1940s, developed floo

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11

Johnson, Bradley G., Martha Cary Eppes, John A. Diemer, Gonzalo Jiménez-Moreno, and Anthony L. Layzell. "Post-glacial landscape response to climate variability in the southeastern San Juan Mountains of Colorado, USA." Quaternary Research 76, no. 3 (November 2011): 352–62. http://dx.doi.org/10.1016/j.yqres.2011.08.006.

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AbstractGeomorphic mapping in the upper Conejos River Valley of the San Juan Mountains has shown that three distinct periods of aggradation have occurred since the end of the last glacial maximum (LGM). The first occurred during the Pleistocene–Holocene transition (~ 12.5–9.5 ka) and is interpreted as paraglacial landscape response to deglaciation after the LGM. Evidence of the second period of aggradation is limited but indicates a small pulse of sedimentation at ~ 5.5 ka. A third, more broadly identifiable period of sedimentation occurred in the late Holocene (~ 2.2–1 ka). The latest two per

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12

Notebaert, B., G. Houbrechts, G. Verstraeten, N. Broothaerts, J. Haeckx, M. Reynders, G. Govers, F. Petit, and J. Poesen. "Fluvial architecture of Belgian river systems in contrasting environments: implications for reconstructing the sedimentation history." Netherlands Journal of Geosciences - Geologie en Mijnbouw 90, no. 1 (August 2011): 31–50. http://dx.doi.org/10.1017/s0016774600000652.

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AbstractAccurate dating is necessary to get insight in the temporal variations in sediment deposition in floodplains. The interpretation of such dates is however dependent on the fluvial architecture of the floodplain. In this study we discuss the fluvial architecture of three contrasting Belgian catchments (Dijle, Geul and Amblève catchment) and how this influences the dating possibilities of net floodplain sediment storage. Although vertical aggradation occurred in all three floodplains during the last part of the Holocene, they differ in the importance of lateral accretion and vertical aggr

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13

Yen, Chin‐lien, Shou‐young Chang, and Hong‐Yuan Lee. "Aggradation‐Degradation Process in Alluvial Channels." Journal of Hydraulic Engineering 118, no. 12 (December 1992): 1651–69. http://dx.doi.org/10.1061/(asce)0733-9429(1992)118:12(1651).

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14

Weninger, J. M., and J. H. McAndrews. "Late Holocene aggradation in the lower Humber River valley, Toronto, Ontario." Canadian Journal of Earth Sciences 26, no. 9 (September 1, 1989): 1842–49. http://dx.doi.org/10.1139/e89-157.

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Alluvial fills are common in the lower reaches of rivers along the western shore of Lake Ontario. The Humber River floodplain at Toronto is underlain by a 2.5 km long wedge of alluvium that thins upstream from Lake Ontario. Floodplain sediments were studied for their lithology, 14C age, and fossil pollen. On the levees, grey clay is overlain by oxidized silt and sand. Sediment cores from two flood ponds grade upward from gravel, sand, and silt, to silty marl, mineral peat, and clay, to heterogeneous silt and sand. Base-level (Lake Ontario) rise directly controlled aggradation between 6500 and

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15

Mehl, A. E., and M. A. Zárate. "Late Glacial-Holocene climatic transition record at the Argentinian Andean piedmont between 33–34° S." Climate of the Past Discussions 9, no. 5 (October 31, 2013): 6125–60. http://dx.doi.org/10.5194/cpd-9-6125-2013.

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Abstract. The Arroyo La Estacada (~33°28' S, 69°02' W), eastern Andean piedmont of Argentina, cuts through an extensive piedmont aggradational unit composed of a dominant late Pleistocene–early Holocene (LP–EH) alluvial sequence including several paleosols. The arroyo sedimentary record exhibits a paleosol developed affecting the topmost part of likely Lateglacial aeolian deposits aggraded into a floodplain environment by the end of the late Pleistocene. The paleosol shows variable grade of development in the outcrops along the arroyo probably in relation to fluvial valley paleotopography. Org

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16

Melo, Rafael Roney Camara de, and José Roberto Gonçalves de Azevedo. "Dynamics of sedimentary Capibaribe River bed after deepening dredging." RBRH 21, no. 4 (October 24, 2016): 871–81. http://dx.doi.org/10.1590/2318-0331.01161603.

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ABSTRACT The growth of urban centers in the country are increasingly dependent on the adoption of new mobility options, and before this need was developed and initiated a project to build a river corridor passenger in a part of the Capibaribe River in the city of Recife-PE. For the implementation of a navigation channel deepening are needed dredging to define a geometry of the bed of the river compatible with the needs of ships that will traverse the channel. The monitoring of dredging is done with the constant bathymetric surveys where the information volumes of dredged sediments are removed,

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17

Lauer, Tobias, Matthias Krbetschek, Manfred Frechen, Sumiko Tsukamoto, Christian Hoselmann, and Michael Weidenfeller. "Infrared radiofluorescence (IR-RF) dating of middle pleistocene fluvial archives of the Heidelberg Basin (Southwest Germany)." Geochronometria 38, no. 1 (March 1, 2011): 23–33. http://dx.doi.org/10.2478/s13386-011-0006-9.

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AbstractThe infrared radiofluorescence (IR-RF) dating technique was applied to eight fluvial samples that were collected from two sediment cores at the Heidelberg Basin located near Viernheim and Ludwigshafen in southwest Germany. Based on the IR-RF derived ages of the samples it was possible to establish a chronological framework for the Mid-Pleistocene fluvial deposits of the Heidelberg Basin. The results allow us to distinguish between four main periods of aggradation. The lowermost sample taken from 100 m core depth lead to an IR-RF age of 643 ± 28 ka pointing to a Cromerian period of aggr

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18

Zhang, Hou, and R. Kahawita. "Nonlinear Model For Aggradation in Alluvial Channels." Journal of Hydraulic Engineering 113, no. 3 (March 1987): 353–68. http://dx.doi.org/10.1061/(asce)0733-9429(1987)113:3(353).

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19

Cui, Yantao, Chris Paola, and Gary Parker. "Numerical simulation of aggradation and downstream fining." Journal of Hydraulic Research 34, no. 2 (March 1996): 185–204. http://dx.doi.org/10.1080/00221689609498496.

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20

Slootman, Arnoud, and Matthieu J. B. Cartigny. "Cyclic steps: Review and aggradation-based classification." Earth-Science Reviews 201 (February 2020): 102949. http://dx.doi.org/10.1016/j.earscirev.2019.102949.

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21

Rice, Stephen P. "Tributary connectivity, confluence aggradation and network biodiversity." Geomorphology 277 (January 2017): 6–16. http://dx.doi.org/10.1016/j.geomorph.2016.03.027.

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22

Ulanowicz, Robert E., Sven Erik Jørgensen, and Brian D. Fath. "Exergy, information and aggradation: An ecosystems reconciliation." Ecological Modelling 198, no. 3-4 (October 2006): 520–24. http://dx.doi.org/10.1016/j.ecolmodel.2006.06.004.

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23

Sándor, Andrea, and Tímea Kiss. "Floodplain aggradation caused by the high magnitude flood of 2006 in the lower Tisza region, Hungary." Journal of Environmental Geography 1, no. 1-2 (January 1, 2008): 31–39. http://dx.doi.org/10.14232/jengeo-2008-43855.

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The area of floodplains in the Carpathian Basin was dramatically reduced as a result of river regulation works in the 19th century. Therefore, the accumulation processes were limited to the narrower floodplains. The aims of the presented study are to determine the rate of accumulation caused by a single flood event on the active, narrow floodplain of the Lower Tisza and to evaluate the relations between the aggradation, flow velocity during the peak of the flood and the canopy. The uncultivated lands in the study area cause increased roughness which decreased the velocity of the flood, influen

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24

Radice, Alessio, and Stefanía Unigarro Villota. "Propagation of aggrading sediment fronts in a laboratory flume." E3S Web of Conferences 40 (2018): 05055. http://dx.doi.org/10.1051/e3sconf/20184005055.

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Channel bed aggradation due to sediment overloading was studied experimentally. A series of aggradation tests, with uniform lightweight sediment, were performed to observe the hydro-morphologic response of a laboratory flume to bed-load sediment transport and nonequilibrium upstream sediment feeding. The hydro-dynamic and the sediment feeding rates were kept constant in time. The temporal evolution of the longitudinal profiles of the stream bed and of the water surface was measured by imaging methods. The experimental data were used to (i) provide a phenomenological description of the aggradat

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von Suchodoletz, Hans, and Dominik Faust. "Late Quaternary fluvial dynamics and landscape evolution at the lower Shulaveris Ghele River (southern Caucasus)." Quaternary Research 89, no. 1 (October 24, 2017): 254–69. http://dx.doi.org/10.1017/qua.2017.80.

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AbstractThe southern Caucasus was intensively settled through the Neolithic period to present. Studies of late Quaternary fluvial dynamics and landscape development at the lower Shulaveris Ghele River in southeastern Georgia aid understanding of the Quaternary history of this region. Our studies show that following river aggradation to form a fan-shaped alluvial surface during the late Pleistocene, fluvial sedimentation shifted west, leaving a fan surface subject only to local fluvial and colluvial processes as well as late Neolithic settlement. At about 6 ka, the river avulsed to the east and

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26

Wu, Chia-Yu, and Joann Mossa. "Decadal-Scale Variations of Thalweg Morphology and Riffle–Pool Sequences in Response to Flow Regulation in the Lowermost Mississippi River." Water 11, no. 6 (June 5, 2019): 1175. http://dx.doi.org/10.3390/w11061175.

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The lowermost Mississippi River (LMR) is one of the largest deltaic systems in North America and one of the heavily human-manipulated fluvial river systems. Historic hydrographic surveys from the mid-1900s to the early 2010s were used to document the thalweg morphology adjustments, as well as the riffle–pool sequences. Extensive aggradation was observed during 1950s to 1960s, as the Atchafalaya River was enlarging before the completion of the Old River Control Structure (ORCS). Following the completion of the ORCS, reductions in sediment input to the LMR resulted in net degradation of the thal

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Poggetti, Emilio, Corrado Cencetti, Pierluigi De Rosa, Andrea Fredduzzi, and Felipe Raphael Rivelli. "Sediment Supply and Hydrogeological Hazard in the Quebrada De Humahuaca (Province of Jujuy, Northwestern Argentina)—Rio Huasamayo and Tilcara Area." Geosciences 9, no. 11 (November 16, 2019): 483. http://dx.doi.org/10.3390/geosciences9110483.

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This paper describes the hydrogeological hazard in a reach of Quebrada de Humahuaca, (Upper Valley of Rio Grande de Jujuy, in the Argentine Andes), elected a World Heritage Site by UNESCO in 2003. Along the Quebrada, the Rio Huasamayo, flowing into the Rio Grande, formed a large alluvial fan where the village of Tilcara was built. The final reach of Rio Huasamayo is an artificial channel, embanked by unconsolidated material removed from the riverbed. The village is located in an area at a lower elevation with respect to the riverbed, still in aggradation; so it is affected by an evident hydrog

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Szafraniec, Joanna Ewa, and Wojciech Dobiński. "Deglaciation Rate of Selected Nunataks in Spitsbergen, Svalbard—Potential for Permafrost Expansion above the Glacial Environment." Geosciences 10, no. 5 (May 25, 2020): 202. http://dx.doi.org/10.3390/geosciences10050202.

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Spitsbergen has recently experienced a continuous deglaciation process, linked to both glacier front retreat and lowering of the glacier surface. This process is accompanied by permafrost aggradation from the top of the slopes down to the glacier. Here, the authors determine the rate of permafrost expansion in this type of vertical profile. To this end, seven nunataks across the island were analysed using Landsat satellite imagery, a high-resolution digital elevation model (ArcticDEM), and geoinformation software. Over the last 24–31 years, new nunataks gradually emerged from the ice cover at

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29

Oetelaar, Gerald A. "River of Change: a Model for the Development of Terraces Along the Bow River, Alberta." Hydrological and Flood Reconstructions 56, no. 2-3 (October 7, 2004): 155–69. http://dx.doi.org/10.7202/009102ar.

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Abstract Researchers working in the Bow River valley have identified a minimum of four alluvial terraces, the upper two of which have been designated as paired terraces. Over the past 35 years, they have attempted to correlate these alluvial landforms and to generate models for the development of the terraces along the section of the Bow River between Calgary and the Rocky Mountains. In this study, Mazama ash and an early Holocene paleosol are used to correlate the terrace suites examined by previous researchers and to generate a model which accounts for the development of the upper two sets o

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Reddy, Dontireddy Venkat, Vuddaraju Singaraju, Rakesh Mishra, Devender Kumar, Puthusserry Joseph Thomas, Karra Kameshwa Rao, and Ashok Kumar Singhvi. "Luminescence chronology of the inland sand dunes from SE India." Quaternary Research 80, no. 2 (September 2013): 265–73. http://dx.doi.org/10.1016/j.yqres.2013.06.003.

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Records of past climate changes have been preserved variously on the earth's surface. Sand dunes are one such prominent imprint, and it is suggested that their presence is an indicator of periods of transition from arid to less arid phases. We report inland sand dunes from Andhra Pradesh (SE India) spread over an area of ~ 500 km2, ~ 75 km inland from the east coast. The dune sands are examined to understand their provenance, transportation, timing of sand aggradation and their relationship to past climates. The dune distribution, grain morphology and the grain-size studies on sands suggest an

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Carver, Daniel P., and Jared M. Beeton. "Holocene landscape evolution and geoarcheology of low-order streams in the Rio Grande basin, San Juan Mountains, Colorado, USA." Quaternary Research 82, no. 2 (September 2014): 331–41. http://dx.doi.org/10.1016/j.yqres.2014.05.006.

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AbstractThis geoarcheological study investigates soil stratigraphy and geochronology of alluvial deposits to determine Holocene landscape evolution within the Hot Creek, La Jara Creek, and Alamosa River drainage basins in the San Juan Mountains of Colorado. Geomorphic mapping and radiocarbon dating indicate synchronicity in patterns of erosion, deposition, and stability between drainage basins. In all three basins, the maximum age of mapped alluvial terraces and fans is ~ 3300 cal yr BP. A depositional period seen at both Hot Creek and the Alamosa River begins ~ 3300 to 3200 cal yr BP. Based o

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Qiao, Li, and Jian Feng Sheng. "Environmental Analysis on Insulation Resistance Reduction Case." Applied Mechanics and Materials 483 (December 2013): 257–61. http://dx.doi.org/10.4028/www.scientific.net/amm.483.257.

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An insulation resistance reduction case was studied in this paper. An electrical component composed with metal panel, screw and insulation panel occurred flashover after 2-year service. Environment assessment, dust analysis and material analysis were done to find the reduction reason. The result shows that the reduction is caused by conductive dust aggraded on insulation panel surface; the aged surface of insulation material is favor for the conductive dust aggradation; humid air and high-hygroscopic dust accelerate this aggradation. It is suggested to improve the hydrophobicity and anti-aging

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Panin, Andrey, Olga Borisova, Evgeny Konstantinov, Yury Belyaev, Ekaterina Eremenko, Andrey Zakharov, and Aleksey Sidorchuk. "The Late Quaternary Evolution of the Upper Reaches of Fluvial Systems in the Southern East European Plain." Quaternary 3, no. 4 (November 13, 2020): 31. http://dx.doi.org/10.3390/quat3040031.

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Networks of dry valleys (or balkas) and hollows in the upper reaches of fluvial basins in extraglacial areas in the Penultimate Glaciation (Marine Isotope Stage 6—MIS 6) regions of the East European Plain demonstrate clear incision/aggradation rhythms corresponding to global glacial/interglacial climate cycles. The first phase of each incision/aggradation rhythm began after the global glacial maximum and was characterized by a cool and humid climate, permafrost and sparse vegetation, when high surface runoff and active linear erosion formed a dense network of gullies. The second phase occurred

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Chao, Yi-Chiung, Chi-Wen Chen, Hsin-Chi Li, and Yung-Ming Chen. "Riverbed Migrations in Western Taiwan under Climate Change." Water 10, no. 11 (November 12, 2018): 1631. http://dx.doi.org/10.3390/w10111631.

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In recent years, extreme weather phenomena have occurred worldwide, resulting in many catastrophic disasters. Under the impact of climate change, the frequency of extreme rainfall events in Taiwan will increase, according to a report on climate change in Taiwan. This study analyzed riverbed migrations, such as degradation and aggradation, caused by extreme rainfall events under climate change for the Choshui River, Taiwan. We used the CCHE1D model to simulate changes in flow discharge and riverbed caused by typhoon events for the base period (1979–2003) and the end of the 21st century (2075–20

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Ribberink, J. S., and J. T. M. Van Der Sande. "Aggradation in rivers due to overloading - analytical approaches." Journal of Hydraulic Research 23, no. 3 (May 1985): 273–83. http://dx.doi.org/10.1080/00221688509499355.

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Akram Gill, Mohammad. "Nonlinear solution of aggradation and degradation in channels." Journal of Hydraulic Research 25, no. 5 (October 1987): 537–47. http://dx.doi.org/10.1080/00221688709499254.

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Lee, Hong-Yuan, and Wei-Sheng Yu. "Nonlinear Solution Of Aggradation And Degradation In Channels." Journal of Hydraulic Research 26, no. 4 (August 1988): 497–98. http://dx.doi.org/10.1080/00221688809499208.

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Daniels, J. Michael. "Floodplain aggradation and pedogenesis in a semiarid environment." Geomorphology 56, no. 3-4 (December 2003): 225–42. http://dx.doi.org/10.1016/s0169-555x(03)00153-3.

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39

Petts, G. E., and M. C. Thoms. "Channel aggradation below Chew Valley Lake, Somerset, U.K." CATENA 13, no. 3 (September 1986): 305–20. http://dx.doi.org/10.1016/0341-8162(86)90005-6.

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40

Eliot, I. G., and D. J. Clarke. "Semi-diurnal variation in beachface aggradation and degradation." Marine Geology 79, no. 1-2 (February 1988): 1–22. http://dx.doi.org/10.1016/0025-3227(88)90153-3.

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41

McCarthy, T. S., I. G. Stanistreet, B. Cairncross, W. N. Ellery, K. Ellery, R. Oelofse, and T. S. A. Grobicki. "Incremental aggradation on the Okavango Delta-fan, Botswana." Geomorphology 1, no. 3 (September 1988): 267–78. http://dx.doi.org/10.1016/0169-555x(88)90017-7.

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42

Persico, Lyman, and Grant Meyer. "Holocene beaver damming, fluvial geomorphology, and climate in Yellowstone National Park, Wyoming." Quaternary Research 71, no. 3 (May 2009): 340–53. http://dx.doi.org/10.1016/j.yqres.2008.09.007.

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Abstract (sommario):

AbstractWe use beaver-pond deposits and geomorphic characteristics of small streams to assess long-term effects of beavers and climate change on Holocene fluvial activity in northern Yellowstone National Park. Although beaver damming has been considered a viable mechanism for major aggradation of mountain stream valleys, this has not been previously tested with stratigraphic and geochronologic data. Thirty-nine radiocarbon ages on beaver-pond deposits fall primarily within the last 4000 yr, but gaps in dated beaver occupation from ~ 2200–1800 and 950–750 cal yr BP correspond with severe drough

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43

Townsend, Kirk F., Michelle S. Nelson, Tammy M. Rittenour, and Joel L. Pederson. "Anatomy and evolution of a dynamic arroyo system, Kanab Creek, southern Utah, USA." GSA Bulletin 131, no. 11-12 (May 2, 2019): 2094–109. http://dx.doi.org/10.1130/b35195.1.

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Abstract Many alluvial valleys in the American Southwest are entrenched within continuous arroyos, and stratigraphic evidence indicates that these fluvial systems experienced repeated periods of entrenchment and aggradation during the mid- to late-Holocene. Previous research suggests arroyo dynamics were regionally quasi-synchronous, implying that they were driven by allogenic forcing due to hydroclimatic fluctuations. However, several of these interpretations rely on records with limited age control and include distal correlations across the American Southwest. While hydroclimatic variability

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44

S. Kale, Vishwas. "Mid to late Quaternary Fluvial activity in allochthonous river systems of the Maharashtra Plateau, India: A review and new observations." Journal of Palaeosciences 70, no. (1-2) (September 10, 2021): 289–304. http://dx.doi.org/10.54991/jop.2021.20.

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Abstract (sommario):

The Maharashtra Plateau dominantly displays an erosional landscape and the Quaternary alluvial deposits in the valleys are remarkably limited in areal extent and thickness. The only exceptions are the infilled basins/valleys downstream of bedrock gorges with knickpoints. Earlier studies have inferred a good correspondence between the major changes in the monsoon regime and the fluvial activity (aggradation and incision/excavation) on the regional–scale during the last ~103 –105 years. However, geomorphic evidence suggests that some of the mid to late Quaternary aggradational events may not be

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45

Gilbert, Graham L., Stefanie Cable, Christine Thiel, Hanne H. Christiansen, and Bo Elberling. "Cryostratigraphy, sedimentology, and the late Quaternary evolution of the Zackenberg River delta, northeast Greenland." Cryosphere 11, no. 3 (May 30, 2017): 1265–82. http://dx.doi.org/10.5194/tc-11-1265-2017.

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Abstract (sommario):

Abstract. The Zackenberg River delta is located in northeast Greenland (74°30′ N, 20°30′ E) at the outlet of the Zackenberg fjord valley. The fjord-valley fill consists of a series of terraced deltaic deposits (ca. 2 km2) formed during relative sea-level (RSL) fall. We investigated the deposits using sedimentological and cryostratigraphic techniques together with optically stimulated luminescence (OSL) dating. We identify four facies associations in sections (4 to 22 m in height) exposed along the modern Zackenberg River and coast. Facies associations relate to (I) overriding glaciers, (II) re

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46

Candy, Ian, Stuart Black, and Bruce W. Sellwood. "U-series isochron dating of immature and mature calcretes as a basis for constructing Quaternary landform chronologies for the Sorbas basin, southeast Spain." Quaternary Research 64, no. 1 (July 2005): 100–111. http://dx.doi.org/10.1016/j.yqres.2005.05.002.

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Abstract (sommario):

AbstractImmature and mature calcretes from an alluvial terrace sequence in the Sorbas basin, southeast Spain, were dated by the U-series isochron technique. The immature horizons consistently produced statistically reliable ages of high precision. The mature horizons typically produced statistically unreliable ages but, because of linear trends in the dataset and low errors associated with each data point, it was still possible to place a best-fit isochron through the dataset to produce an age with low associated uncertainties. It is, however, only possible to prove that these statistically un

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47

Aricò, C., and T. Tucciarelli. "Diffusive Modeling of Aggradation and Degradation in Artificial Channels." Journal of Hydraulic Engineering 134, no. 8 (August 2008): 1079–88. http://dx.doi.org/10.1061/(asce)0733-9429(2008)134:8(1079).

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48

Bhallamudi, S. Murty, and M. Hanif Chaudhry. "Numerical Modeling of Aggradation and Degradation in Alluvial Channels." Journal of Hydraulic Engineering 117, no. 9 (September 1991): 1145–64. http://dx.doi.org/10.1061/(asce)0733-9429(1991)117:9(1145).

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49

Bradford, Scott F., and Nikolaos D. Katopodes. "Hydrodynamics of Turbid Underflows. II: Aggradation, Avulsion, and Channelization." Journal of Hydraulic Engineering 125, no. 10 (October 1999): 1016–28. http://dx.doi.org/10.1061/(asce)0733-9429(1999)125:10(1016).

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50

Simms, Alexander R., John B. Anderson, and Michael Blum. "Barrier-island aggradation via inlet migration: Mustang Island, Texas." Sedimentary Geology 187, no. 1-2 (May 2006): 105–25. http://dx.doi.org/10.1016/j.sedgeo.2005.12.023.

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