Two adjacent beaver-pond sequences of seven ponds each were examined along the eastern boundary of Glacier National Park, Montana, to determine spatial patterns and amounts of sedimentation, both within individual ponds and along pond sequences
. Dams and their associated ponds were categorized into two age groups, young versus old, based on dam morphology and surface vegetation.
Sedimentation rates and patterns in beaver ponds in a mountain environment
Bilan sédimentaire ; Biogéographie ; Erosion des sols ; Etang ; Etats-Unis ; Milieu humide ; Montagne ; Montana ; Qualité de l'eau ; Versant ; Végétation
Biogeography ; Humid environment ; Montana ; Mountain ; Pond ; Sediment budget ; Slope ; Soil erosion ; United States of America ; Vegetation ; Water quality
The AA. examine the rates and volume of sedimentation occuring in recently constructed beaver ponds of known age in the northern Rocky Mountains of Glacier National Park, Montana, USA. They describe how these factors vary by pond-site type
, by position within a downstream chain of ponds, and by consideration of carbon dynamics. They compare their data to studies from the boreal forest of eastern and central North America.
Mapovani vegetace rybniku s pouzitim fotointerpretacni metody. (Mapping of vegetation of ponds with use of photo-interpretation)
Carte de la végétation ; Cesky ; Géographie de l'Europe ; Milieu humide ; Photo-interprétation ; Tchécoslovaquie ; Végétation ; Végétation ripicole
The littorals of ponds are often covered by dense vegetation not suitable for field mapping. The method of vertical photographical mapping is demonstrated on two ponds in Northern Bohemia. (MS).
Aerial photography ; Colorado ; Global Positioning System ; Landslide ; Mountain ; Photogrammetry ; Photointerpretation ; Pond ; Topography ; United States of America
The AA. evaluate the implication that pond locations are controlled by basal slip surface topography using 9 years of systematic field observations of 8 ponds, and Global Positioning System (GPS) observations of the spatial position and water level
elevation of one pond on the Slumgullion landslide in the San Juan Mountains of southwestern Colorado. They also examine the persistence of surface morphology at the 8 pond locations using topographic profiles measured from stereo aerial photographs from
Temporal variability of sediment yield using accumulations in small ponds
Accumulation lacustre ; British Columbia ; Canada ; Chronostratigraphie ; Datation radiocarbone ; Géographie de l'Amérique ; Holocène ; Lac ; Quaternaire ; Rocky Mountains ; Variabilité temporelle
Présentation d'une méthode d'évolution de la variabilité temporelle de l'accumulation des sédiments dans des petits lacs. Application au Gallie Pond, dans les Coast Mountains, British Columbia.
Calibration ; Cardiff ; Généralités sur la géographie ; Interaction spatiale ; Migration d'achat ; Modèle ; Modèle de gravité ; Modélisation ; Prévision ; Royaume-Uni
Calibration de modèles complexes par la modification du modèle de gravité traditionnel en modèle linéaire généralisé avec une structure d'erreur de Poisson et une fonction logarithmique de liaison. Test sur le pondde Cardiff.
The Euglenophyta of a polluted lowland brook-pond system at Boom (Antwerp, Belgium) during an aeration experiment
Algue ; Belgique ; Cours d'eau ; Ecosystème ; Euglénophyte ; Eutrophisation ; Géographie de l'Europe ; Hydrochimie ; Marécage ; Milieu humide ; Pollution ; Technique de recherche
A polluted lowland brook-pond system was locally treated by aeration using the EVENS-technique. Over a period of 3 years the water was analysed physico-chemically and the Euglenophyta population was studied. (LW).
The effect of ponding depth on infiltration in a crusted surface depression
Centre ; Encroûtement ; Erosion des sols ; Expérimentation ; France ; Haute-Normandie ; Hydraulique agricole ; Infiltration ; Microrelief ; Propriétés du sol ; Précipitation ; Simulation de pluie ; Sol
This study investigates the influence of ponding depth on infiltration rate in a depression caped with a seal of varying thickness and porosity. Two ponding depths were selected : 0.5 cm (shallow) and 4.0 cm (deep), and two soils of distinctly
different aggregate stability were tested in Blosseville (Pays de Caux) and Villamblain (Petite Beauce), France.
A total of 26.826 insect larvae and pupae were collected from 13 sampling areas in a polluted brook-pond system, locally treated by aeration. 106 species were collected: 1 Ephemeroptera, 4 Coleoptera and 101 Diptera. The Chironomidae dominated
by species richness and density of individuals/m. Two major insects communities were recognizable: the brook community was characterized by a high species richness of Brachycera and Nematocera, while the pond community consisted nearly exclusively
The objectives of this study are to make an assessment of the variability in dry sediment bulk density (dbD) between and within small flood retention ponds in central Belgium and to look at the factors controlling this variability. It will further
be evaluated if the various existing dry sediment bulk density prediction techniques for large reservoirs can be used in another environment, i.e. small ponds, and what the implications of their use are for the calculation of sediment yield.
The AA. demonstrate the effect seasonal inter-dune freshwater ponds have on the bleaching of the color of sand dunes by iron reduction in the anaerobic conditions they create. By combining spectral measurements of field samples of dune sand together
The characteristics of general geographical conditions and soils in the habitats and breeding grounds of the European Pond Turtle (Emys orbicularis) in Poleski National Park
Habitat ; Lieu de reproduction ; Niche écologique ; Parc national ; Parc naturel ; Poles'e ; Pologne ; Protection de la nature ; Sable ; Sol ; Tortue ; Tourbe
The two main questions answered concerned the characteristics of the soils in the habitats and breeding grounds of the European Pond Turtle in Poland's Poleski National Park and whether or not it is possible to create a general model
for the habitats and breeding grunds of the species. The study was conducted on selected peaty and sansy materials, the European Pond Turtle being shown to choose soils of its habitats and breeding grounds with care. A model for habitants and breeding grounds
is presented and the research also shows that a few special conditions are mainly responsible for the successful breeding of the European Pond Turtle in Polesie.- (BJ)
Action anthropique ; Bassin-versant ; Erodabilité ; Erosion des sols ; Etang ; Granulométrie ; Honshū ; Japon ; Propriétés du sol ; Précipitation ; Sédimentation ; Vitesse d'érosion
Erodibility ; Erosion rate ; Grain size distribution ; Honshu ; Human impact ; Japan ; Pond ; Precipitation ; Sedimentation ; Soil erosion ; Soil properties ; Watershed
Five years of observations on sedimentation rates in two ponds located near transformed land areas in the Kobe district of central Japan have shown the relationship between sedimentation and development during land transformation. One of the ponds
Pond Inlet, N.W.T. Beobachtungen zur Struktur eines eskimoischen Wirtschaftsraumes Pond Inlet, Northwestern Territories. Appréhension de la structure d'un espace économique esquimau
1921-1973 ; Canada ; Chasse ; Condition écologique ; Economie de subsistance ; Environnement ; Esquimau ; Ethnie ; Géographie des régions polaires ; Mode de vie ; Northwest Territories ; Pond Inlet
La Hudson's Bay Company s'est installée à Pond Inlet dès 1921, puis en 1929 vinrent des missions catholique et protestante. Pond Inlet s'est développé à partir d'un point de peuplement esquimau. Jusqu'au début des années60, ceux-ci vivaient en
groupes de quelques familles et en communauté économique, d'autres vivaient d'une économie de subsistance élargie, s'ouvrant sur le marché. Ils vivent essentiellement de pêche et de chasse| leur revenu dépend des conditions écologiques de cette partie des
Northwest Territories, puisqu'ils vendent les peaux de leurs produits de chasse. Leur espace économique connaît des fluctuations cycliques, vu l'inégale durée d'exploitation du territoire et la plus ou moins grande concentration d'animaux à fourrure sur
Etude du potentiel de filtreurs des chaînes trophiques dans les processus d'eutrophisation des bassins
Biogeography ; Biological indicator ; Ecosystem ; European part of Russia ; Eutrophication ; Food chain ; Phytoplankton ; Pond ; Yaroslavl ; Zooplankton
Analyse des principaux facteurs régissant l'eutrophisation et la déseutrophisation des bassins; étude du fonctionnementdes filtreurs de grande taille dans les écosystèmes aquatiques; évaluation de la signification des cladocères dans la diminution
Estimating trap efficiency of small reservoirs and ponds : methods and implications for the assessment of sediment yield
Bibliography ; Flood control ; Irrigation ; Model ; Pond ; Sedimentology ; Water supply
Cet article présente une revue des différentes méthodes disponibles pour estimer l'efficacité de piégeage des réservoirs et des étangs : modèles empiriques et modèles théoriques; implications pour l'établissement de bilans sédimentaires; lacunes de
Earthquake-related geomorphic environment and pond sediment information
Années 1990 ; Glissement de terrain ; Honshū ; Japon ; Lac ; Montagne ; Sédimentation lacustre ; Séisme ; Variabilité interannuelle ; Vitesse d'accumulation
Two sediment traps were placed on the bed of the pond in May 1995, after the earthquake, in order to investigate earthquake-related changes in erosion, transportation and sedimentation that may have been recorded in the lake sediments. Six years