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  • 1
    Monograph available for loan
    Monograph available for loan
    Carbon, nitrogen, and phosphorus transport by world rivers (1982)
    Details Availability
    Call number: ZN 93.0322
    Type of Medium: Monograph available for loan
    Pages: S. 401-450
    Series Statement: American Journal of Science 282, 1982
    Branch Library: AWI Library
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  • 2
    Electronic Resource
    Electronic Resource
    Seasonal and inter-annual variations of nitrogen diagenesis in the sediments of a recently impounded basin (1989)
    Springer
    Biogeochemistry 8 (1989), S. 73-100 
    Details
    ISSN: 1573-515X
    Keywords: Nitrogen cycling ; non stationary diagenesis ; recently impounded basin ; denitrification ammonification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract The Méry-sur-Oise (France) storage reservoir is an artificial basin of 9 m average depth, fed by water from the river Oise with a mean residence time of about 4 days. Sediments are accumulating at a rate of about 0.7 cm/month. In the sediments, two fractions of organic nitrogen with different rates of bacterial degradation could be distinguished, one associated with fresh phytoplankton, the other made of detrital and more refractory compounds. The fluxes of oxygen, nitrate and ammonium across the sediment-water interface were measured with a bell-jar system at different seasons during a 3 year period following flooding of the basin. The measurements show clear seasonal variations in relation with the variations of temperature and input of fresh phytoplanktonic material to the sediment. In addition, a long term trend of increasing ammonium was observed. Measurements were also carried out after dredging of all accumulated sediments of the basin. They showed a considerable reduction of the flux of nitrate to the sediments and a significant reduction of the flux of ammonium to the water column. These results are interpreted in the light of a non stationary model of N diagenesis in accumulating sediments. This model is able to predict at least the general trends of benthic N cycling of basins during the early stage of their ecological succession.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02180168
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  • 3
    Electronic Resource
    Electronic Resource
    Man and river interface: multiple impacts on water and particulates chemistry illustrated in the Seine river basin (1998)
    Springer
    Hydrobiologia 373-374 (1998), S. 1-20 
    Details
    ISSN: 1573-5117
    Keywords: river ; water quality ; major ions ; nutrients ; Co ; Ni ; Hg ; Zn ; Seine ; Paris
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We analyse average water and particulate chemistry (nutrients, major ions, heavy metals) in the Seine basin at 10 key positions, from stream order one to river mouth (order 8, 67000 km2), and for a population density gradient from one to 20000 people km-2. Particulates are studied on stream deposited sediments and on recent riverflood deposits collected over two years. The impact of Paris megalopolis (10 M people for 2300 km2) is considered both on the main river course and on periurban and urban streams. Average concentrations at each position are normalized for all variables to pristine levels, mostly determined on a set of forested headwaters, in order to define the 'change ratio'. In the main river course these ratios vary from less than 0.5 for dissolved SiO2 to more than 10 for Na+, K+, particulate Hg and Zn, and exceeds 50 for NH4 +,PO4 -3 and NO2 -. They reach over two order of magnitude for NH4 + and PO4 -3 in urban streams now covered and used as sewers, the ultimate anthropogenic impact. Few variables, such as Mg++ and particulate Co, are not affected by human activities, and Ca+ and HCO3 - are regulated by calcite precipitation linked to river eutrophication. The change ratios can be used to describe the spatial structure of impacts. For each variable, the maximum impact position depends on the pollution mode and origin: NO3 maximum is already noted in small agricultural streams but PO4 -3 maximum occurs at the most downstream stations. The maximum impact of the Paris megalopolis is observed more than 75 km downstream of the city centre (proximal impact) but the river water quality is still affected 200 km downstream (distal impact). In addition to this classical longitudinal impact mode, the megalopolis also creates radial impacts, and 'inverse' impacts due to flow regulations in upstream river reaches.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1017067506832
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  • 4
    Electronic Resource
    Electronic Resource
    Riverine transport of atmospheric carbon: Sources, global typology and budget (1993)
    Springer
    Water, air & soil pollution 70 (1993), S. 443-463 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Atmospheric C (TAC) is continuously transported by rivers at the continents’ surface as soil dissolved and particulate organic C (DOC, POC) and dissolved inorganic C (DIC) used in rock weathering reactions. Global typology of the C export rates (g.m−2.yr−1) for 14 river classes from tundra rivers to monsoon rivers is used to calculate global TAC flux to oceans estimated to 542 Tg.yr−1, of which 37 % is as DOC, 18 % as soil POC and 45 % as DIC. TAC originates mostly from humid tropics (46 %) and temperate forest and grassland (31 %), compared to boreal forest (14 %), savannah and sub-arid regions (5 %), and tundra (4 %). Rivers also carry to oceans 80 Tg. yr−1 of POC and 137 TG.yr−1 of DIC originating from rock erosion. Permanent TAC storage on land is estimated to 52 Tg.yr−1 in lakes and 17 Tg.yr−1 in internal regions of the continents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01105015
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  • 5
    Electronic Resource
    Electronic Resource
    Land and water interface zones (1993)
    Springer
    Water, air & soil pollution 70 (1993), S. 123-137 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This paper reports analyses of C pools and fluxes in land-water interface zones completed at the International Workshop: Terrestrial Biospheric Carbon Fluxes; Quantification of Sinks and Sources of CO2 (Bad Harzburg, Germany, March 1–5, 1993). The objective was to determine the role of these zones as global sinks of atmospheric CO2 as part of a larger effort to quantify global C sinks and sources in the past (ca. 1850), the present, and the foreseeable future (ca. 2050). Assuming the world population doubles by the year 2050, storage of atmospheric C in reservoirs will also double, as will river loads of atmospheric C and nutrients. It is estimated that C sinks in temperate and boreal wetlands have decreased by about 50%, from 0.2 to 0.1 Gt C yr−1 since 1850. The total decrease for wetlands may be considerably larger when tropical wetlands are taken into account, however, the area and C density of tropical wetlands are not well known at this time. Changes in cultivation practices and improved sampling of methaneogenesis have caused estimates of CH4 emissions from ricelands to drop substantially from 150 to 60 Tg yr−1. Even with doubled N and P loads, rivers are unlikely to fertilize more than about 20% of the new primary production in the coastal ocean. The source of C for this new production may not be the atmosphere, however, because the coastal ocean exchanges large quantities of DIC with the open ocean. Until the C fluxes from air-sea exchange of CO2 and DIC are better quantified, the C-sink potential of the coastal ocean will remain a major uncertainty in the global C cycle. Analysis of model simulations of oceanic C uptake reconfirmed that the open ocean appears to take up about 2.0 Gt C yr−1 from the atmosphere and that model estimates are in better accord now, ±0.5 Gt C yr−1, than ever before. Land use management must consider the unique C sinks in coastal and alluvial wetlands in order to minimize the future negative impacts of agriculture and urban development. Long-term monitoring will be essential to prove the success, or failure, of management practices to sustain wetlands in the future. Relative to the other systems examined at the workshop, the C-sink capacity of the ocean (excluding estuaries) is not likely to be measurably affected in the foreseeable future by the management scenarios considered at the workshop.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01104992
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  • 6
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    GEMS-GLORI world river discharge database (2012)
    PANGAEA
    In:  Laboratoire de Géologie Appliquée, Université Pierre et Marie Curie, Paris, France
    Details
    Publication Date: 2023-01-13
    Description: The GEMS-GLORI register, circulated by UNEP for review in 1996, lists 555 world major rivers discharging to oceans (Q 〉 10 km**3/year, or A 〉 10 000 km**2, or sediment discharge 〉 5Mt/year, or basin population 〉5M people). Up to 48 river attributes are listed, including major ions and nutrients (C, N, P) in both dissolved, particulate, organic and inorganic forms. For many rivers, two or three sets of data are provided with relevant periods of records and references. Although half of the selected rivers are not yet documented for water quality, most of the first 40 rivers are well described (Irrawady, Zambezi, Ogooue, Magdalena, are noted exceptions). Altogether about 10 000 individual data from 500 references are listed. The global coverage in terms of river discharge and/or drainage area ranges from 40 to 67% for most major water quality attributes but drops to 25% for some organic and/or particulate forms of N and P. Planned development of the register includes collection of information on particulate chemistry and data on endorheic rivers and selected tributaries.
    Keywords: Area; Average runoff; Bicarbonate ion; Calcium; Carbon, inorganic, dissolved; Carbon, inorganic, particulate; Carbon, organic, dissolved; Carbon, organic, dissolved + particulate; Carbon, organic, particulate; Carbon, organic, total; Carbon, total dissolved; Chloride; Continent; Country; Discharge, average per year; Discharge, specific; Dissolved load; LATITUDE; Length; LONGITUDE; Magnesium; Nitrogen, organic, dissolved; Nitrogen, total; Nitrogen in ammonium; Nitrogen in nitrate; Ocean; Particulate organic carbon; Particulate organic nitrogen; Phosphorus, organic, dissolved; Phosphorus, particulate; Phosphorus, total; Phosphorus in orthophosphate; Potassium; Precipitation, annual total; Reference/source; River; Silica, dissolved; Sodium; Sulfate; Sum anions; Sum cations; Suspended load; Suspended matter, particulate/solids; Temperature, air; Thermometer; Total dissolved solids
    Type: Dataset
    Format: text/tab-separated-values, 20354 data points
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    DATA PANGAEA
  • 7
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    Global hydrobelts and hydroregions (2013)
    PANGAEA
    In:  Supplement to: Meybeck, Michel; Kummu, Matti; Dürr, Hans H (2013): Global hydrobelts and hydroregions: improved reporting scale for water-related issues? Hydrology and Earth System Sciences, 17, 1093-1111, https://doi.org/10.5194/hess-17-1093-2013
    Details
    Publication Date: 2023-01-13
    Description: Hydrobelts divide the global landmasses into eight hydrological regions with resolution of 0.5°, based primarily on the annual average temperature (T) and runoff (q). The interbelt differences were maximised and intrabelt variability minimise. These hydrobelts are decomposed on continents as 26 hydroregions. The main aim of the dataset is to provide a robust reporting scale that could be used in water-related issues. The spatial datafiles for both, hydrobelts and hydroregions, are provided as shp-files and ascii raster files with accompanied metadata.
    Keywords: File content; File name; Uniform resource locator/link to file
    Type: Dataset
    Format: text/tab-separated-values, 15 data points
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    DATA PANGAEA
  • 8
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    Increasing dependence of lowland populations on mountain water resources (2020)
    Springer Nature
    Details
    Publication Date: 2020-07-06
    Electronic ISSN: 2398-9629
    Topics: Biology
    Published by Springer Nature
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    PAPER CURRENT
  • 9
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    Elemental mass-balance of material carried by major world rivers (1979)
    Elsevier
    Details
    Publication Date: 1979-03-01
    Print ISSN: 0304-4203
    Electronic ISSN: 1872-7581
    Topics: Geosciences
    Published by Elsevier
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  • 10
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    Riverine quality at the Anthropocene: Propositions for global space and time analysis, illustrated by the Seine River (2002)
    Springer
    Details
    Publication Date: 2002-12-01
    Print ISSN: 1015-1621
    Electronic ISSN: 1420-9055
    Topics: Biology
    Published by Springer
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