GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Stochastic analysis of acid shocks generated by mixed hydrological processes (1990)
    Springer
    Water, air & soil pollution 53 (1990), S. 239-250 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract High H+ concentration of stream flow events were analyzed in terms of the probability of magnitude, frequency, duration, and time of occurrence. Simple methods of representing the timing and duration of high H+ concentration flows as stochastic variables are presented. Existing stochastic models are applied to the probability distributions of the annual frequency of high H' ion concentration flows and their magnitudes. A consideration of the statistical properties of the above stochastic variables leads to the development of a technique with which higher H+ concentration flow events exceeding any higher level of interest may be investigated without resorting to re-analysis of the historical data. The proposed methodology was applied to the daily H+ concentration flow records of two watersheds located in diverse hydrological and geochemical environments in Canada.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00170740
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Editorial (1992)
    Springer
    Environmental monitoring and assessment 23 (1992), S. vii 
    Details
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406948
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Evaluation of the effects of acid precipitation in eastern Canada using the raison system (1992)
    Springer
    Environmental monitoring and assessment 23 (1992), S. 71-82 
    Details
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Evaluations have been made of the key chemical factors in the aquatic effects upon surface waters due to acidic precipitation in eastern Canada. The region of Canada east of the Manitoba/Ontario border was divided into 22 aggregates and assessments of inorganic and organic ion chemistry appraised relative to sulphate deposition rates and distributions. Aquatic sensitivity is largely dominated by the concentration, distribution and magnitude of SO inf4 sup2- (sulphate) deposition and by the prevalent geology and derived soils found in each aggregate. The RAISON system provided an adaptable and highly flexible platform to evaluate interactively, multiple data sets of divergent characteristics. Attributes usually associated with geographical information systems are significantly augmented by quantitative numerical and stochastic capabilities that were used extensively in this study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406953
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Interfacing a hydrological model with the RAISON expert system (1992)
    Springer
    Water resources management 6 (1992), S. 25-34 
    Details
    ISSN: 1573-1650
    Keywords: Hydrological model ; RAISON expert system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: Abstract The RAISON expert system allows for the interactive analysis of spatial data related to water resources investigations. A conceptual design for the interface between the RAISON expert system and hydrological model includes functions for the simulation of runoff. Design criteria include ease of use, minimal equipment requirements, a generic data base management system, and use of a micro computer. An application is demonstrated for Northeast Pond River watershed, Newfoundland, that performs to predict the runoff.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00872185
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Mass balance models of phosphorus in sediments and water (1982)
    Springer
    Hydrobiologia 91-92 (1982), S. 217-225 
    Details
    ISSN: 1573-5117
    Keywords: mass balance models ; total phosphorus ; settling ; resuspension ; transport ; mixing ; loading ; sediment release
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Models are presented in order of progressively more complex spatial resolution in which the effects on the sediment-water interactions are emphasized. For simple models, the diagnostic approach of calculating the net settling and return of total phosphorus is demonstrated with data from Lake Erie. For more complex models, the effects of interbasin transport and vertical mixing are shown to be important in determining the pathways of the sediment-released or sediment-bound phosphorus in the water column.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00940112
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Mass balance models of phosphorus in sediments and water (1982)
    Springer
    Hydrobiologia 91-92 (1982), S. 217-225 
    Details
    ISSN: 1573-5117
    Keywords: mass balance models ; total phosphorus ; settling ; resuspension ; transport ; mixing ; loading ; sediment release
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Models are presented in order of progressively more complex spatial resolution in which the effects on the sediment-water interactions are emphasized. For simple models, the diagnostic approach of calculating the net settling and return of total phosphorus is demonstrated with data from Lake Erie. For more complex models, the effects of interbasin transport and vertical mixing are shown to be important in determining the pathways of the sediment-released or sediment-bound phosphorus in the water column.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02391938
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    An expert system for assessing safety and security of heterogeneous public water sources (1992)
    Springer
    Environmental monitoring and assessment 23 (1992), S. 57-70 
    Details
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We have implemented a diagnostic system designed to advise on the likely causes of sanitary problems with public water sources. The approach to the problem makes extensive use of rule based expert systems and multi media information (maps, data, text, expert knowledge). The rules were based on actual water survey data, with a weighting scheme designed to highlight causes of health risks approximately in reverse order of importance (where such order may be presumed to exist). Out put is a vailable in one of several languages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406952
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    The predicted effect of SO2 emission controls on the water quality of eastern Canadian lakes (1992)
    Springer
    Environmental monitoring and assessment 23 (1992), S. 99-113 
    Details
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Changes in SO inf4 sup2- deposition predicted to occur in response to implementation of announced SO2 emission control programs in Canada and the U.S.A. have been used as input to water chemistry models thereby giving an estimate of the changes in lake acid neutralizing capacity (ANC) and pH that can be expected from these programs. Eastern Canada has been divided into 22 subregions for the purpose of this analysis. Relative to the current level (1982–86) of SO inf4 sup2- deposition (Scenario 1), the effect of the Canadian SO2 emission control program alone (Scenario 2) is compared to that obtained when controls are implemented throughout North America (Scenarios 3 and 4). SO2 emission reduction will effect a shrinkage of the high wet SO inf4 sup2- deposition field in NE North America such that under Scenario 4 conditions, almost no area will remain in Canada that receives 〉20 kg ha-1 yr-1. The greatest decrease in deposition and resulting change in lake chemistry occurs in southern Ontario and southwestern Quebec. ANC distributions shift to higher concentrations and the percentage of lakes having pH〈6 decreases in these areas. The Atlantic Provinces will obtain only a minor benefit from the control programs, i.e. experiencing only a small decrease in deposition and improvement in water quality. High sensitivity of the terrain in many parts of Atlantic Canada means that large numbers of lakes will remain acidic (i.e. ANC〈0) and/or have pH〈6 (an important biological threshold) even after full implementation of the current plans for SO2 control in Canada and the U.S.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406955
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    An expert system for water quality modelling (1992)
    Springer
    Environmental monitoring and assessment 23 (1992), S. 1-18 
    Details
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The RAISON-micro (Regional Analysis by Intelligent System ON a micro-computer) expert system is being used to predict the effects of mine effluents on receiving waters in Ontario. The potential of this system to assist regulatory agencies and mining industries to define more acceptable effluent limits was shown in an initial study. This system has been further developed so that the expert system helps the model user choose the most appropriate model for a particular application from a hierarchy of models. The system currently contains seven models which range from steady state to time dependent models, for both conservative and nonconservative substances in rivers and lakes. The menu driven expert system prompts the model user for information such as the nature of the receiving water system, the type of effluent being considered, and the range of background data available for use as input to the models. The system can also be used to determine the nature of the environmental conditions at the site which are not available in the textual information database, such as the components of river flow. Applications of the water quality expert system are presented for representative mine sites in the Timmins area of Ontario.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406949
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    A knowledge-based approach to regional acidification modelling (1992)
    Springer
    Environmental monitoring and assessment 23 (1992), S. 83-97 
    Details
    ISSN: 1573-2959
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Data from over 2000 stations and knowledge from experts on atmospheric transport, soil geochemistry, lake chemistry, wetland processes and acidification modelling were assembled in an expert system. The data were grouped by aggregates of tertiary watersheds based on water chemistry knowledge. A set of expert rules was used to determine which of six existing models was most appropriate for a given set of data. Comparison of computed and observed alkalinity indicated median relative errors from 11.3–17.9%, with regression slopes ranging from 0.91–1.18 and regression coefficients between 0.82 and 0.99. The expert model performance was further confirmed with paleolimnological data and other independent sets of data. The sensitivity of the predicted alkalinity was illustrated by changing some of the rules. Given that the rules were acceptable by experts and produced reasonable agreement with observations, the knowledge-based system seemed a viable approach to the impact assessment of acidic deposition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406954
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...