Effects of historical land use on sediment yield from a lacustrine watershed in central Chile
Aerial photography ; Chile ; Geographical information system ; Isotope dating ; Lacustrinesediment ; Land use ; Palynology ; Photointerpretation ; Sediment budget
Années 1943-1994 ; Bilan sédimentaire ; Chili ; Datation isotopique ; Palynologie ; Photo-interprétation ; Photographie aérienne ; Système d'information géographique ; Sédiment lacustre ; Utilisation du sol
Sediment yield in the San Pedro Lake watershed, inferred from sedimentation in the lake, can be related to land use changes shown on aerial photographs taken during the period 1943-1994. To study effects of these changes, the AA. took a core from
the centre of the lake and estimated sedimentation rates by Pb 210 dating, which they checked with Cs 137 and pine pollen. Sediment yield between 1955 and 1994 closely tracks the total land use change that can be detected on sets of aerial photographs
European part of Russia ; Holocene ; Kola Peninsula ; Lacustrine basin ; Lacustrine deposit ; Lacustrinesediment ; Lake ; Postglacial ; Tectonics ; Terrace
Construction de ces terrasses par dépôts lacustres à l'Holocène. Texture des sédiments et processus d'accumulation. Morphotectonique du bassin lacustre d'Imandra.
The AA. propose a new age scale for the late Quaternary sediments of Lake Biwa which they have devised by establishing a paleoclimatic linkage between the lacustrinesediment record and the well-dated marine record of glacial-interglacial cycles.
D'après les résultats d'un sondage des sédiments vaseux des lacs de Valdaï, on montre que lors de changement du niveau des lacs sous l'influence de facteurs climatiques ou lors d'un régulation anthropique, des parties de boues lavées se forment avec
Estimates of suspended sediment yield over the past 800 years have been derived from a whole-basin study of lake sediments in Llyn Geirionydd, North Wales. Magnetic and physical sediment properties were used to correlate a suite of cores to a master
chronology based on 210Pb and 14C dates. The sources of sediment within the catchment were identified by comparing the magnetic and heavy metal properties of sediments, soils, and stream sediments.
This article examines the sediment provenance in the Shudu Lake basin, northwest Yunnan Province, China, as revealed by composite fingerprinting. Based on this technique, variations in the geochemical signature as¬sociated with lacustrinesediment
deposits indicate that almost half of the total catchment sediment yield over an approximate 50-year period originated from channel banks. Conversely, the relative contributions of eroded sediment from both woodland and shrubland have generally remained
[b1] State Key Laboratory of Lacustrine Science and Environment, Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, Chine
Sediment yield from glacio-lacustrine calcareous deposits during the postglacial period in the Combe d'Ain (Jura, France)
France ; Glaciolacustrine ; Jura ; Mass movement ; Postglacial ; Sediment budget ; Slope dynamics ; Soil erosion ; Valley
The middle valley of the river Ain (Jura) cuts through glacio-lacustrine deposits laid down in an ice-dammed lake during the most recent glacial advance. The high values of sediment yield are ascribed to the amenability of glacio-lacustrine deposits
In the Central Sinai the Precambrian rocks of the crystalline basement are partly covered with fine-grained, marly sediments. The sediments indicate a periodic change between more fluvial, coarser horizons and more finegrained, eolian horizons which
have been accumulated under stillwater conditions. The present paper shall contribute to solve the differing opinions about the petrogenesis of the silty sediments including their provenance.
Application of the QDa-Md method of environmental discrimination to particle size analyses of fine sediments by pipette and sedigraph methods: a comparative study
Grain size distribution ; Lacustrinesediment ; Methodology ; Scotland ; Sedimentology ; United Kingdom
The results of particle size analyses by the low-technology pipette method and by the modern SediGraph, of a suite of fine lacustrine bottom sediment samples, are compared. However, the study principally considers the influence of the different
Caractéristiques générales du lac dee barrage. Formation et accumulation de sédiments de fond. Accumulation de métaux dans les sédiments de fond. Accumulation dans les vases de xénobiotiques organiques.
Late Quaternary lacustrine history and paleoclimatic significance of pluvial Lake Cochise, southeastern Arizona
Arizona ; Datation C 14 ; Etats-Unis ; Géographie de l'Amérique ; Lac ; Niveau lacustre ; Paléoclimat ; Paléogéographie ; Pluvial ; Quaternaire ; Stratigraphie ; Sédimentation lacustre
Etude stratigraphique et géochronologique des sédiments lacustres du Lac Cochise. Reconstitution paléoclimatique du Quaternaire supérieur dans le sud de l'Arizona.
This paper is concerned with the stratigraphy and facies analysis of Lake Alsek sediments. Discussion focusses on vertical facies relationships and seeks to determine what sedimentary record has been preserved. This analysis is part of a synthetic
Rate of sedimentation in Lake Kinneret, Israel : spatial and temporal variations
Biogenic process ; Israel ; Lacustrinesedimentation ; Lake ; Seasonal variation ; Sedimentation rate ; Spatial variation ; Stream ; Suspended load
Action biogène ; Charge en suspension ; Cours d'eau ; Israël ; Lac ; Sédimentation lacustre ; Taux de sédimentation ; Variation saisonnière ; Variation spatiale
The aim of this study is to determine the seasonal and spatial patterns of sedimentation rates in Lake Kinneret. The method used in this study minimized the problem of sediment resuspension from the lake bottom, by locating the traps above lake
bottom. The rate of sedimentation near the Jordan's inflow is highly correlated to flow discharge in the river, while in the centre of the lake the seasonal sedimentation pattern is mainly correlated to the bloom period of Peridinium gatunense.
Sédimentation villafranchienne, volcanisme et tectonique du versant est de l'extrémité septentrionale du Devès
Devès ; France ; Géographie de l'Europe ; Massif Central ; Quaternaire ; Subsidence ; Sédimentation ; Tectonique ; Villafranchien ; Volcanisme
Villafranchian subsidence, with lacustrine deposits, followed by an uplift contemporaneous with the related eruption of the Devès volcanoes (Haute-Loire, France).
Lake and reservoir sedimentation. Prediction and interpretation
Costa Rica ; Dammed lake ; Discharge ; Grain size distribution;Granulometry ; Lacustrinesedimentation ; Lake ; Mathematical model ; Palaeohydrology ; Sedimentology ; Suspended load ; Turbidity
Charge en suspension ; Costa Rica ; Débit ; Granulométrie ; Lac ; Lac de barrage ; Modèle mathématique ; Paléohydrologie ; Sédimentation lacustre ; Sédimentologie ; Turbidité
Essai de simulation des processus de sédimentation par un modèle mathématique. Application de ce modèle au réservoir Cachi, Rio Reventazon, Costa Rica, et discussion des implications sédimentologiques.
Cold area ; Greenland ; Lacustrinesedimentation ; Lake ; Proglacial lake ; Sediment transport ; Varves
Groenland ; Lac ; Lac proglaciaire ; Sédimentation lacustre ; Transport sédimentaire ; Varve ; Zone froide
Three cores collected from a proglacial lake with an Axelsson corer are x-rayed. The stratification is interpreted as varves. The cores cover periods of sedimentation with a duration from 5-23 years. The average thickness of the varves vary from 1.9
-20.0 mm indicating a tenfold variation in the sedimentation rate.