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Journal articles on the topic 'Terracettes'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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1

Greenwood, P., S. Kuonen, W. Fister, and N. J. Kuhn. "The influence of terracettes on the surface hydrology of steep-sloping and subalpine environments: some preliminary findings." Geographica Helvetica 70, no. 1 (February 23, 2015): 63–73. http://dx.doi.org/10.5194/gh-70-63-2015.

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Abstract. Alpine and mountain slopes represent important pathways that link high-altitude grazing areas to meadows and rangelands at lower elevations. Given the often acute gradients associated with such environments, they potentially represent highly efficient runoff conveyance routes that facilitate the downslope movement of runoff and associated material during erosion events. Many such slopes host series of small steps, or "terracettes". The juxtaposition of terracettes against the natural downslope flow path of non-complex slopes leads us to hypothesise that they may influence typical hillslope processes by intercepting or capturing surface runoff. Here we report preliminary results and some tentative conclusions from ongoing work to explore this possibility. Google Earth was used to initially identify a ca. 400 m2 well-developed terracette system situated on a west-facing slope with gradients ranging from 25 to 40° (46 to 84 %). A digital elevation model (DEM) of the terracettes was constructed using spatial data taken from a relevant section of topographic map. The DEM was then queried using a flow-accumulation algorithm and the results displayed in a geographic information system. The output data provided "proof of concept" that terracettes can capture surface runoff. The generation of empirical data from a series of rainfall/runoff simulations performed on the same section of terracettes supports this finding. Results from both work components indicate that sections of a terracette system may intercept runoff and could act as preferential flow pathways. By contrast, some sections appeared to act as depositional sites. We cautiously predict that these areas could act as retention zones for the temporary storage of runoff-associated substances. Greater understanding of the exact influence of terracettes on surface hydrology in steep-sloping and subalpine environments could benefit the future management of grazing and rangelands in such areas.
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2

Henck, Amanda, James Taylor, Hongliang Lu, Yongxian Li, Qingxia Yang, Barbara Grub, Sara Jo Breslow, et al. "Anthropogenic hillslope terraces and swidden agriculture in Jiuzhaigou National Park, northern Sichuan, China." Quaternary Research 73, no. 2 (March 2010): 201–7. http://dx.doi.org/10.1016/j.yqres.2009.10.001.

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Small, irregular terraces on hillslopes, or terracettes, are common landscape features throughout west central China. Despite their prevalence, there is limited understanding of the nature of these topographic features, the processes that form them, and the role humans played in their formation. We used an interdisciplinary approach to investigate the geology, ecology, and cultural history of terracette development within Jiuzhaigou National Park, Sichuan Province, China. Terracettes occur on south facing, 20° slopes at 2500 m elevation, which appears to coincide with places people historically preferred to build villages. Ethnographic interviews suggest that traditional swidden agricultural cycles removed tree roots, causing the loess sediments to lose cohesion, slump, and the terrace risers to retreat uphill over time. This evidence is supported by landslide debris at terracette faces. Archaeological analysis of terracette sites reveal remains of rammed spread soil structures, bones, stone tools, and ceramics dating from at least 2200 years before present within a distinct paleosol layer. Radiocarbon and optically stimulated luminescence dating of terracette sediments ranged in age from between 1500 and 2000 14C yr BP and between 16 and 0.30"ka, respectively. These multiple lines of evidence indicate a long history of human habitation within Jiuzhaigou National Park and taken together, suggest strong links between terracette formation and human-landuse interactions.
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3

Weihs, Brandon J., and John F. Shroder. "Mega-terracettes and related ungulate activities in Loess Hills, Iowa, USA." Zeitschrift für Geomorphologie 55, no. 1 (March 1, 2011): 45–61. http://dx.doi.org/10.1127/0372-8854/2011/0055-0024.

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4

Gallart, Francesc, Joan Puigdefa´bregas, and Gabriel del Barrio. "Computer simulation of high mountain terracettes as interaction between vegetation growth and sediment movement." CATENA 20, no. 6 (December 1993): 529–42. http://dx.doi.org/10.1016/0341-8162(93)90015-h.

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5

Hellman, Ian, Robert Heinse, Jason W. Karl, and Mark Corrao. "Detection of terracettes in semi‐arid rangelands using Fourier‐based image analysis of very‐high‐resolution satellite imagery." Earth Surface Processes and Landforms 45, no. 13 (August 25, 2020): 3368–80. http://dx.doi.org/10.1002/esp.4971.

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6

Cannone, N., and M. Guglielmin. "Relationships between periglacial features and vegetation development in Victoria Land, continental Antarctica." Antarctic Science 22, no. 6 (December 2010): 703–13. http://dx.doi.org/10.1017/s0954102010000751.

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AbstractThe relationships between vegetation patterns and periglacial features and their underlying ecology are still poorly understood and lack specific investigations in Antarctica. Here we present the results of vegetation colonization of different types of sorted patterned ground and gelifluction features (lobes and terracettes) at four sites in northern Victoria Land. This paper aims to understand the relationships between vegetation and the most widespread periglacial features in Victoria Land, discuss the role of periglacial features and vegetation in determining the ground surface temperature, and assess whether periglacial features provide ecological niches for vegetation colonization and development. Vegetation patterns are influenced by the feature type, mainly relating to patterned ground and debris island versus gelifluction features. The relations between vegetation and the periglacial features investigated in continental Antarctic are similar to those described for the Arctic, although in this part of the Antarctic vegetation is exclusively composed of cryptogams. Frost heave, ground texture and relief associated with different types of periglacial features provide a range of ecological niches sustaining vegetation biodiversity. Our data confirm the importance of periglacial features in shaping flora and vegetation biodiversity, as previously assessed only for the soil fauna in continental Antarctic.
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7

KÜCK, K. M., and C. A. LEWIS. "TERRACETTES AND ACTIVE GELIFLUCTION TERRACES IN THE DRAKENSBERG OF THE PROVINCE OF THE EASTERN CAPE, SOUTH AFRICA: A PROCESS STUDY." South African Geographical Journal 84, no. 2 (September 2002): 214–25. http://dx.doi.org/10.1080/03736245.2002.9713773.

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8

Guidry, Sean A., and Henry S. Chafetz. "Siliceous shrubs in hot springs from Yellowstone National Park, Wyoming, U.S.A." Canadian Journal of Earth Sciences 40, no. 11 (November 1, 2003): 1571–83. http://dx.doi.org/10.1139/e03-069.

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Many of the siliceous hot springs in Yellowstone National Park contain subaqueous, spinose siliceous precipitates up to 5 cm high that occupy shallow terracettes in siliceous terraced mound accumulations, discharge channels, etc. These siliceous "shrubs" are composed of opal-A with an arborescent or branching pattern and have strong morphological similarities to bacterial shrubs from carbonate-precipitating hot springs. Siliceous shrubs constitute a major precipitate style associated with discharge channel – flow-path facies throughout most of the 20 m of flow path at Cistern Spring, Norris Geyser Basin. They are found in siliceous spring waters ranging in temperature from 76.4 to 16.2 °C and pH from 6.0 to 7.4. At every scale, siliceous shrubs contain abundant evidence of microbial life in the form of bacterial body fossils and extracellular polymeric substances. The presence of relict organic constituents and bacterial morphological fossils indicates that the shrub fabric and architecture are dominated by bacteria, i.e., there is potentially a strong biotic effect on the precipitation process. Precipitation of opal in siliceous shrubs is very likely the result of either active bacterially induced precipitation or passive mediation through organic templates. On a larger scale, siliceous shrubs contain abundant evidence of former microbial activity in hot springs, thus they are good microbial biomarkers.
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9

Corrao, Mark, Robert Heinse, Jan Eitel, Barbara Cosens, and Tim Link. "Soil Moisture Differences between Terracette Benches and Risers on Semiarid Rangeland Hillslopes." Vadose Zone Journal 15, no. 1 (January 2016): vzj2015.04.0058. http://dx.doi.org/10.2136/vzj2015.04.0058.

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10

Pentecost, Allan. "The formation of travertine shrubs: Mammoth Hot Springs, Wyoming." Geological Magazine 127, no. 2 (March 1990): 159–68. http://dx.doi.org/10.1017/s0016756800013844.

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AbstractThe structure and microbiology of active travertines is described from Canary and Minerva springs, with emphasis on ‘shrubs’ growing in terracette pools. These dendritic growths of aragonite consist of intricately branched sprays containing thousands of radiating needles. Shrub microstructure could be explained by the principle of ‘Keimauslese” and the preferential elongation of sharp protuberances in a rapidly depositing environment.The shrubs, and other active travertines, contain unicellular and filamentous bacteria. Estimates of total bacteria numbers ranged from 0.6−1.7 × 105 mm−3 but biomass was low, and always less than 1% of the travertine by weight. No evidence was found to indicate that bacteria played a role in shrub growth or morphology, but crystal trapping on bacterial strings may influence travertine fabrics on cascades. The shrubs are considered to have developed by inorganic processes, in hot spring waters supersaturated with aragonite.
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11

Corrao, Mark V., Barbara E. Cosens, Robert Heinse, Jan U. H. Eitel, and Timothy E. Link. "Using Science to Bridge Management and Policy: Terracette Hydrologic Function and Water Quality Best Management Practices in Idaho." Rangelands 37, no. 5 (October 2015): 191–99. http://dx.doi.org/10.1016/j.rala.2015.08.003.

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12

Bonini, José Eduardo, Jurandyr Luciano Sanches Ross, Tiago D. Martins, and Bianca Carvalho Vieira. "Escorregamentos rasos em São Luiz do Paraitinga (SP, Brasil) (2009-2010)." Physis Terrae - Revista Ibero-Afro-Americana de Geografia Física e Ambiente 2, no. 2 (January 27, 2021): 85–99. http://dx.doi.org/10.21814/physisterrae.3076.

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Escorregamentos e inundações estão entre as tipologias de desastres que geram os maiores danos no Brasil. No verão de 2009-2010 algumas cidades no Planalto de Paraitinga-Paraibuna (SP), dentre elas São Luiz do Paraitinga, foram atingidas por precipitações intensas que deflagraram centenas de escorregamentos e uma grande inundação. O objetivo deste artigo foi caracterizar as áreas afetadas por escorregamentos considerando aspectos geológicos, geomorfológicos e de uso da terra, tendo como área de estudo três bacias hidrográficas em São Luiz do Paraitinga com grande quantidade de registros de escorregamentos rasos. Os resultados mostraram um predomínio de vertentes embasadas por granitoides, com ângulos até 23º, com curvatura côncava e cobertas por pastos com terracetes de pisoteio. Os escorregamentos rasos de 2009-2010 ocorreram, sobretudo, em vertentes embasadas por rochas granitoides e migmatíticas, com ângulos entre 25º e 37º. Estudos futuros podem avaliar a relação entre o uso da terra e os escorregamentos de 2009-2010 no Planalto de Paraitinga-Paraibuna, além de avaliações mais detalhadas sobre as propriedades dos solos e os fatores deflagradores dos escorregamentos.
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13

Corrao, Mark V., Timothy E. Link, Robert Heinse, and Jan U. H. Eitel. "Modeling of terracette-hillslope soil moisture as a function of aspect, slope and vegetation in a semi-arid environment." Earth Surface Processes and Landforms 42, no. 10 (February 19, 2017): 1560–72. http://dx.doi.org/10.1002/esp.4114.

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14

Sun, Yi, Fujiang Hou, Jay P. Angerer, and Shuhua Yi. "Effects of topography and land-use patterns on the spatial heterogeneity of terracette landscapes in the Loess Plateau, China." Ecological Indicators 109 (February 2020): 105839. http://dx.doi.org/10.1016/j.ecolind.2019.105839.

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15

Djokic, Tara, Martin J. Van Kranendonk, Kathleen A. Campbell, Malcolm R. Walter, and Colin R. Ward. "Earliest signs of life on land preserved in ca. 3.5 Ga hot spring deposits." Nature Communications 8, no. 1 (May 9, 2017). http://dx.doi.org/10.1038/ncomms15263.

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Abstract The ca. 3.48 Ga Dresser Formation, Pilbara Craton, Western Australia, is well known for hosting some of Earth’s earliest convincing evidence of life (stromatolites, fractionated sulfur/carbon isotopes, microfossils) within a dynamic, low-eruptive volcanic caldera affected by voluminous hydrothermal fluid circulation. However, missing from the caldera model were surface manifestations of the volcanic-hydrothermal system (hot springs, geysers) and their unequivocal link with life. Here we present new discoveries of hot spring deposits including geyserite, sinter terracettes and mineralized remnants of hot spring pools/vents, all of which preserve a suite of microbial biosignatures indicative of the earliest life on land. These include stromatolites, newly observed microbial palisade fabric and gas bubbles preserved in inferred mineralized, exopolymeric substance. These findings extend the known geological record of inhabited terrestrial hot springs on Earth by ∼3 billion years and offer an analogue in the search for potential fossil life in ancient Martian hot springs.
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16

Jin, Baocheng, Guojun Sun, Ying Zhang, Mei Zou, Xiaofeng Ni, Kai Luo, Xueli Zhang, Hua Cheng, Fengmin Li, and X. Ben Wu. "Livestock tracks transform resource distribution on terracette landscapes of the Loess Plateau." Ecosphere 7, no. 4 (April 2016). http://dx.doi.org/10.1002/ecs2.1337.

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