Search results for "MORPHOLOGY"

2017

Abstract. The aim of this study is to present a framework that provides new ways to characterize the spatio-temporal variability of lateral exchanges for water flow and solute transport in a karst conduit network during flood events, treating both the diffusive wave equation and the advection–diffusion equation with the same mathematical approach, assuming uniform lateral flow and solute transport. A solution to the inverse problem for the advection–diffusion equations is then applied to data from two successive gauging stations to simulate flows and solute exchange dynamics after recharge. The study site is the karst conduit network of the Fourbanne aquifer in the French Jura Mountains, wh…

Des particules charbonneuses, t�moins des variations de l'�rosion chimique d'un bassin versant calcaire durant l'holoc�ne (bassin de chaillexon, doub…

1999

Matter fluxes result from chemical and mechanical weathering that vary as a function of climate, relief, lithology and human activities. The aim of this paper is to characterize chemical weathering variations in the past using coaly particles found in both the geological substratum and the Holocene lacustrine sediments of a calcareous basin (Chaillexon lake, Doubs, France). Results point out that chemical weathering was the predominant erosional process in the watershed, which may be due to the calcareous nature of the bedrock. The significant variability of this process relative to mechanical weathering during the Holocene period can be interpreted as a consequence of the development of th…

Taxonomic uncertainty and a continental conundrum:Polypodium macaronesicumreassessed

2014

Data from the chloroplast trnL-F region are used to test the delimitation of putative diploid species in the Polypodium cambricum aggregate. In particular, we investigate the distinctiveness of the Macaronesian Polypodium macaronesicum, P. azoricum and the continental P. cambricum, investigate molecular diversity patterns within Macaronesia and establish the identity of putative P. macaronesicum material collected from an area in southern Spain, where it co-occurs with other Macaronesian elements. The analysis supports the distinction of Macaronesian and continental plants, with accessions from Macaronesia resolved as monophyletic. Greater haplotype diversity was found in Macaronesia than o…

Taxonomic Revision of the Genus Trictenotoma Gray, 1832 (Coleoptera: Trictenotomidae). Part 3 – Species from the Philippine Archipelago, with Descrip…

2021

The species of Trictenotoma Grey, 1832 from the Philippine Archipelago are critically assessed, description of T. boudanti Drumont et Telnov sp. nov. from Balabac and Palawan, and a redescription of T. cindarellaKriesche, 1921 from Mindanao are provided. A key to the Philippine Trictenotomidae Blanchard, 1845 is presented for the first time.

Effects of the 6th September 2002 earthquake: damage amplification in the south-eastern sector of Palermo explained by GIS technology

2009

During the 6th September 2002 earthquake the highest damage level in Palermo was observed in the SE sector.
 This is a recent urbanization area where reinforced concrete structures predominate. A detailed analysis of soil
 properties in Palermo was carried out by City-GIS to investigate a possible role of nearsurface geology on earthquake
 effects. City-GIS is a tool dedicated to natural hazard evaluation in urban areas. The availability of high
 density of well log data (stratigraphic and geotechnical) allowed a realistic modeling of surface geology and
 physical-mechanical properties that control the seismic response. In wide zones of the above mentioned sector
 of…

Evaporite karst in Italy: A review

2017

none 16 si Although outcropping rarely in Italy, evaporite (gypsum and anhydrite) karst has been described in detail since the early 20th century. Gypsum caves are now known from almost all Italian regions, but are mainly localised along the northern border of the Apennine chain (Emilia Romagna and Marche), Calabria, and Sicily, where the major outcrops occur. Recently, important caves have also been discovered in the underground gypsum mines in Piedmont. During the late 80s and 90s several multidisciplinary studies were carried out in many gypsum areas, resulting in a comprehensive overview, promoting further research in these special karst regions. More recent and detailed studies focused…

Note illustrative alla carta geomorfologica e della vegetazione dell’area della Rupe

2001

Using a small COTS UAV to quantify moraine dynamics in Arctic environments

2016

International audience; Arctic regions are known to be places where climate shift yields most visible consequences. In this context, glaciers and their environment are highly subject to global warming effects. New dynamics are observed and the behaviour of arctic systems (such as glaciers, moraines, beaches etc) changes at rates visible over yearly observations. According to recent works on climate change impacts on the cryosphere, short/violent events are recently observed and are one characteristic of these changes. As a consequence, an accelerating rate of glacial and pro-glacial activity is observed, especially at the end of each hydrological season (early fall). As an example, many pha…

Valoda: nozīme un forma. Nr. 13: Gramatika un valodas prasme

2022

Latvian Grammar

2021

“Latvian Grammar” was written to make information about the Latvian language and its grammatical system more easily available not only within Latvia, but also beyond its borders. A modern grammar of Latvian written in English is as important for native speakers of Latvian as for those who have learned Latvian as a second language and also is of great value for anyone interested in the culture and history of Latvia or the Latvian language itself. The need for a reference grammar of Latvian written in English is especially important right now due to the existence of a large Latvian diaspora community abroad, particularly in English-speaking countries where children and young people are educat…