共查询到20条相似文献,搜索用时 31 毫秒
1.
Dynamics of storm-driven suspended sediments in a headwater catchment described by multivariable modeling 总被引:1,自引:0,他引:1
Milan Onderka Andreas Krein Sebastian Wrede Núria Martínez-Carreras Lucien Hoffmann 《Journal of Soils and Sediments》2012,12(4):620-635
Purpose
Previous research has shown that the rate at which suspended sediment is transported in watercourses depends primarily on discharge (Q) as the first-order control, but additional factors are thought to affect suspended sediment concentrations (SSC) as well. Among these, antecedent hydrological and meteorological conditions (e.g., rainfall depth and intensity, discharge prior to a runoff event and the duration of runoff events) may represent significant transport controlling mechanisms. Univariate models using Q–SSC rating curves often produce large scatter and nonlinearity, because many of the hydrological and biotic processes affecting the dynamics of sediment are non-linear and exhibit threshold behavior. The simulation of such highly non-linear processes is therefore an elusive task requiring consideration of several interrelated controlling variables. The aim of this study was to identify the major hydrological and meteorological controls determining the dynamics of SSC during storm-runoff events and the magnitude of SSC in a headwater catchment in Luxembourg. 相似文献2.
Edita Mazurová Klára Hilscherová Tereza Šídlová-Štěpánková Heinz-R. Köhler Rita Triebskorn Dirk Jungmann John P. Giesy 《Journal of Soils and Sediments》2010,10(3):423-433
Purpose
The aim of the present study was to investigate possible relationships between the sediment contaminants and the occurrence of intersex in situ. Two of the studied sediments were from polluted sites with increased occurrence of intersex crustaceans (Lake Pilnok, black coal mining area in the Czech Republic, inhabited by the crayfish Pontastacus leptodactylus population with 18% of intersex; creek Lockwitzbach in Germany with Gammarus fossarum population with about 7% of intersex). 相似文献3.
Britta Eklund Maria Elfström Irene Gallego Bengt-Erik Bengtsson Magnus Breitholtz 《Journal of Soils and Sediments》2010,10(1):127-141
Purpose
The main objective of the current study was to assess the impact of pleasure boat activities on harbour sediment quality in the Stockholm area. Sediment contamination is a growing ecological issue, and there is consequently a need to use sediment bioassays in combination with chemical analysis to determine the impact on the ecosystem. To generate sediment toxicity data relevant for the Baltic Sea, a secondary objective was to further develop and evaluate two well-established bioassays for saltwater, with the macroalga Ceramium tenuicorne and the crustacean Nitocra spinipes, to be useful also for toxicity testing of whole sediment. A major concern has been to minimize any manipulation of the sediments. A third objective was to assess whether a simple leaching procedure could be used to simulate sediment toxicity by comparing results from whole sediment and leachate tests. 相似文献4.
Evaluation of the potential toxicity (acute and chronic) of sediments from abandoned uranium mine ponds 总被引:1,自引:0,他引:1
Background, Aim and Scope
The superficial aquatic system of the Cunha Baixa uranium mine area is comprised by the flooded mine pit (M), which receives the acidic mine effluent resultant from in situ leaching of pore ore, a pond where this effluent is neutralised (T), and a potential reference pond (Ref). As part of the first tiers of an ecological risk assessment that is being performed in this area, the aim of this work was to evaluate the potential sediment toxicity of these ponds. 相似文献5.
Purpose
The main aim of this work is to provide a comprehensive estimation of the sediment yield of the Ebro Basin (NE Iberian Peninsula) in the twentieth century. 相似文献6.
Manuel López-Vicente Noemí Lana-Renault José Maria García-Ruiz Ana Navas 《Journal of Soils and Sediments》2011,11(8):1440-1455
Purpose
Sediment delivery from headwater catchments to reservoirs is a serious threat to reservoir sustainability and is a critical issue in Mediterranean environments where water resources are scarce. In this study we assessed the consequences of two landscape management scenarios (natural vegetation recovery and scrub clearance) on soil erosion and sediment yield. The results were analyzed in relation to predicted and measured rates of soil erosion and sediment yield, with the aim of promoting better management practices. 相似文献7.
Lien T. H. Nguyen Michiel B. Vandegehuchte Harm G. van der Geest Colin R. Janssen 《Journal of Soils and Sediments》2012,12(5):749-757
Purpose
The mayfly Ephoron virgo plays a key role in the ecological recovery in large European rivers. The larvae spend their life in the sediment and are therefore exposed to contaminants in various ways. In this study, the use of E. virgo as a test species for whole sediment bioassays was evaluated. The sensitivity was compared with Hexagenia limbata (a North American mayfly recommended for standard sediment testing). Lead (Pb) was used as a model contaminant. 相似文献8.
Spatial distribution of sediments and transfer properties in soils in a stormwater infiltration basin 总被引:3,自引:2,他引:1
Patrice Cannavo Laure Vidal-Beaudet Béatrice Béchet Laurent Lassabatère Sylvain Charpentier 《Journal of Soils and Sediments》2010,10(8):1499-1509
Purpose
The aim of our study was to characterise the heterogeneity of sediment distribution in a stormwater retention/infiltration basin (Pont de Cheviré, Nantes, France) and to determine the impact of this distribution on water transfer properties in the soil. 相似文献9.
Magalie Delmas Olivier Cerdan Jean-Marie Mouchel Manuel Garcin 《Journal of Soils and Sediments》2009,9(6):613-626
Background, aim, and scope
Sediment fluxes within continental areas play a major role in biogeochemical cycles and are often the cause of soil surface degradation as well as water and ecosystem pollution. In a situation where a high proportion of the land surface is experiencing significant global land use and climate changes, it appears important to establish sediment budgets considering the major processes forcing sediment redistribution within drainage areas. In this context, the aim of this study is to test a methodology to estimate a sediment yield index at a large spatial resolution for European river basins. 相似文献10.
Philipp Egeler Daniel Gilberg Guido Fink Karen Duis 《Journal of Soils and Sediments》2010,10(3):368-376
Purpose
Previous studies have shown that ivermectin, a widely used parasiticide, is very toxic to many non-target invertebrate species. In view of the strong binding of ivermectin to sediments and the scarcity of data on chronic toxicity to freshwater sediment invertebrates, chronic effects of the parasiticide on the midge Chironomus riparius and the oligochaete Lumbriculus variegatus were investigated. 相似文献11.
Qiu-Fang Zhang Jing-Jing Peng Qian Chen Xiao-Fang Li Chun-Yan Xu Hong-Bing Yin Shen Yu 《Journal of Soils and Sediments》2011,11(6):1020-1031
Purpose
Spartina alterniflora widely invades coastal wetland in China and might change nitrification in sediment. Both ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) are involved in nitrification in this environment. The objective of this study was to examine the effect of S. alterniflora invasion on abundance and composition of AOA and AOB. 相似文献12.
Eric de Deckere Ward De Cooman Vicky Leloup Patrick Meire Claudia Schmitt Peter C. von der Ohe 《Journal of Soils and Sediments》2011,11(3):504-517
Purpose
The development of Sediment Quality Guidelines (SQGs) is one of the remaining challenges for a better protection of aquatic biodiversity and in particular sediment dwelling organisms. So far, sediment quality assessment in Flanders was based on a comparison of chemical concentrations to the geometric mean of the concentrations at 12 reference sites. The study described in this paper addressed the need for more science-based guidelines. The developed guidelines are already incorporated into Flemish legislation. 相似文献13.
Núria Martínez-Carreras Andreas Krein Thomas Udelhoven Francesc Gallart Jean F. Iffly Lucien Hoffmann Laurent Pfister Desmond E. Walling 《Journal of Soils and Sediments》2010,10(3):400-413
Purpose
This paper reports on the development of a rapid and simple spectra-reflectance-based fingerprinting approach for documenting suspended sediment sources during storm runoff events. The methodology was applied in the rural Wollefsbach catchment (4.4 km2, NW Luxembourg). 相似文献14.
Tobias Schulze Mathias Ricking Christa Schröter-Kermani Andrea Körner Hans-Dietrich Denner Karlheinz Weinfurtner Andreas Winkler Asaf Pekdeger 《Journal of Soils and Sediments》2007,7(6):361-367
Goal, Scope and Background
The European Water Framework Directive implies a risk based sediment management. In this approach, sediments are recognised as secondary sources of contaminants, and suspended particulate matter (SPM) as the carrier. For that reason, the concept of the German Environmental Specimen Bank (ESB) includes the establishment of these specimens. The ESB is characterised by a high quality assurance system of standard operation procedures (SOP) to preserve the integrity of the specimens under cryogenic conditions for transportation, storage and handling. The aim of this study was (1) the development and validation of SOPs for the collection of sediment and SPM, and (2) the adaptation and standardisation of sampling techniques for the ESB. This paper provides information about sediment and SPM as new specimens in the ESB. 相似文献15.
Philipp Egeler Kevin S. Henry Caroline Riedhammer 《Journal of Soils and Sediments》2010,10(3):377-388
Purpose
Standardized sediment toxicity assays often employ periodic additions of uncontaminated food to sustain energy and growth requirements of the test organisms. Consequently, selective feeding on this uncontaminated food may reduce exposure to sediment particles containing the test substance. To address this issue, some standard guidelines propose to add food to the sediment before spiking with the test substance to account for multiple exposure routes, including ingestion of contaminated food. The present study focused on the influence of different feeding regimens and compositions of the aqueous medium on water quality (ammonia concentrations) and test organism development. 相似文献16.
Coline Druart Maurice Millet Renaud Scheifler Olivier Delhomme Annette de Vaufleury 《Journal of Soils and Sediments》2011,11(8):1373-1384
Purpose
The aim of this work was to assess the transfer and effects of two widely used herbicides on the land snail Helix aspersa during long-term exposure under laboratory conditions. 相似文献17.
Purpose
The objective of this study was to complement analyses according to the European Union Water Framework Directive (WFD) with a sediment toxicity analysis as part of an integrated river assessment. To this end, Hessian water courses were analyzed using the sediment quality triad concept according to Chapman with chemical analyses, in situ effect evaluations, and ecotoxicological assessments. For the ecotoxicological assessment (fish embryo toxicity test with Danio rerio), a new evaluation scheme was developed, the fish teratogenicity index (FTI), that allows for a classification of sediments into ecological quality classes compliant to the WFD. 相似文献18.
Michiel J. van der Meulen Ane P. Wiersma Marcel van der Perk Hans Middelkoop Noortje Hobo 《Journal of Soils and Sediments》2009,9(6):627-639
Background, aim, and scope
The Netherlands has vast resources of clay that are exploited for the fabrication of structural ceramic products such as bricks and roof tiles. Most clay is extracted from the so-called embanked floodplains along the rivers Rhine and Meuse, areas that are flooded during high-discharge conditions. Riverside clay extraction is—at least in theory—compensated by deposition. Based on a sediment balance (deposition versus extraction), we explore the extent to which clay can be regarded as a renewable resource, with potential for sustainable use. Beyond that, we discuss the implications for river and sediment management, especially for the large engineering works that are to be undertaken to increase the discharge capacities of the Rhine and Meuse. 相似文献19.
Patricia Sanmartín Rosa Devesa-Rey Beatriz Prieto María Teresa Barral 《Journal of Soils and Sediments》2011,11(5):841-851
Purpose
The quantification of phytopigments in riverbed sediments deserves further attention because it provides information about eutrophic levels, and therefore about sediment and water quality. Due to the current interest in the study of eutrophication processes, there is a need for the development of a rapid, simple, cost-effective, and nondestructive method of quantifying phytopigment content. We describe one method based on color measurements and without the need for extraction and chemical assay. 相似文献20.
Ana F. Pereira Miranda José M. L. Rodrigues Carlos Barata Carmen Riva Dayanthi Nugegoda Amadeu M. V. M. Soares 《Journal of Soils and Sediments》2011,11(2):373-381