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  • Articles  (20)
  • monitoring  (19)
  • Chemical Engineering
  • Fisheries
  • Organic Chemistry
  • 2000-2004  (20)
  • Energy, Environment Protection, Nuclear Power Engineering  (16)
  • Economics  (4)
  • 1
    ISSN: 1573-0840
    Keywords: acid rain ; photochemical smog ; ground-level ozone ; particulate matter ; modelling ; monitoring ; real-time prediction ; policy application
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract Acid rain and photochemical smog are two regionalair-quality issues that have received considerableattention in the last two decades due to their harmfuleffects. Health impacts of particulate matter (PM) inthe atmosphere is another issue of concern. Sulphur dioxide emission controls were introducedin both Canada and the U.S.A. to reduceacid-deposition-related damage. While these emissionreductions have already resulted in reduced sulphatedeposition, based on results from modelling studiesmuch of southeastern Canada is still expected toexperience damaging levels of acid deposition evenafter all currently legislated emission controls arefully implemented. Moreover, there has not been acorresponding reduction in the acidity ofprecipitation. This may be attributable to aconcurrent reduction in base-cation concentration inprecipitation. Models were also developed to understand theformation, transport and diffusion of troposphericozone. The models have been used to provide policyguidance for emission control options to reduceground-level ozone to acceptable limits. In thesummer of 1997 a Canadian pilot project was initiatedto provide real-time forecasts of ground-level ozonein the southeastern part of the province of NewBrunswick in eastern Canada. With the emergence of fine Particulate Matter(PM2.5) as a health concern, efforts are underwayin Canada to develop a “unified'' regional air-qualitymodel that will address the combined impacts ofvarious pollutants in the atmosphere. In this effortthe atmosphere is viewed as a single entity where theimpacts of multiple pollutants are considered at thesame time.
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  • 2
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    Journal of management & governance 4 (2000), S. 53-67 
    ISSN: 1572-963X
    Keywords: asymmetries between managers and employees ; incentive contracts ; monitoring ; time constraints ; time horizon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract Governance in organizations according to traditionalagency theory is based on the premise that managersand employees do not have identical goals. As aconsequence, employees need to be monitored andcontrolled. If legal contracts are not sufficient forproper control, incentive contracts should be used. This paper argues that incentive contracts are notsufficient to solve governance issues in organizationsdue to problems in measurability and enforceability ofpresumed contract violations. Such problems arecomplicated by asymmetries in power, perspectives andaspirations between managers and employees. Acognitive argument is advanced suggesting that timeconstraints and bounded rationality render the idea ofmonitoring relatively ineffective. Governance ideasthat focus on communication flow and informationsharing are described. The role that other cognitiveelements such as memory play in a more comprehensiveand interdisciplinary framework for understandinggovernance relations is discussed.
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  • 3
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    Review of quantitative finance and accounting 15 (2000), S. 325-347 
    ISSN: 1573-7179
    Keywords: earnings management ; information asymmetry ; monitoring ; seasoned equity offerings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract This paper conducts an empirical investigation of the relationship between information asymmetry and earnings management predicted by Dye (1988) and Trueman and Titman (1988). When information asymmetry is high, stakeholders do not have sufficient resources, incentives, or access to relevant information to monitor manager's actions, which gives rise to the practice of earnings management (Schipper, 1989; Warfield et al., 1995). Empirical results suggest a systematic relationship between the magnitude of information asymmetry and the level of earnings management in two different settings.
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  • 4
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    Open economies review 11 (2000), S. 69-109 
    ISSN: 1573-708X
    Keywords: bank crises ; bad banking practices ; incentives ; moral hazard ; monitoring ; supervision ; regulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract Recent bank crises in developed and developing countries have underlined the question of a good “regulatory regime,” which is a wider concept than the set of prudential principles and business rules established by external regulatory agencies. The role of external regulation in fostering a safe and sound banking system is limited. The incentive's structure for private banks and the efficiency of monitoring and supervision have to play a great role. Liberalization of markets can have bad effects in the transitional period, but advantages can be enormous after the system starts to work correctly. The main lesson of recent bank crises is that there needs to be more effective surveillance of financial institutions both by supervisory authorities and by markets. Effective regulation (internal and external) and supervision of banks and financial institutions have the potential to give a major contribution to the stability and robustness of financial system.
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  • 5
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    Mitigation and adaptation strategies for global change 5 (2000), S. 189-216 
    ISSN: 1573-1596
    Keywords: certification ; Clean Development Mechanism ; energy efficiency ; evaluation ; global climate change ; greenhouse gas emissions ; joint implementation ; monitoring ; reporting ; verification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography
    Notes: Abstract In this paper, we present an overview of guidelinesdeveloped for the monitoring, evaluation, reporting,verification, and certification (MERVC) ofenergy-efficiency projects for climate changemitigation. The monitoring and evaluation ofenergy-efficiency projects is needed to determine moreaccurately their impact on greenhouse gas (GHG)emissions and other attributes, and to ensure that theglobal climate is protected and that countryobligations are met. Reporting, verification andcertification will be needed for addressing therequirements of the Kyoto Protocol. While the cost ofmonitoring and evaluation of energy-efficiencyprojects is expected to be about 5–10% of a project'sbudget, the actual cost of monitoring and evaluationwill vary depending on many factors, including thelevel of precision required for measuring energy andGHG reductions, type of project, and amount of fundingavailable.
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  • 6
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    Journal of business ethics 28 (2000), S. 255-265 
    ISSN: 1573-0697
    Keywords: email ; internet ; monitoring ; privacy ; surveillance ; workplace ; World Wide Web
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Economics
    Notes: Abstract This paper examines workplace surveillance and monitoring. It is argued that privacy is a moral right, and while such surveillance and monitoring can be justified in some circumstances, there is a presumption against the infringement of privacy. An account of privacy precedes consideration of various arguments frequently given for the surveillance and monitoring of employees, arguments which look at the benefits, or supposed benefits, to employees as well as to employers. The paper examines the general monitoring of work, and the monitoring of email, listservers and the World Wide Web. It is argued that many of the common justifications given for this surveillance and monitoring do not stand up to close scrutiny.
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  • 7
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    Environmental monitoring and assessment 64 (2000), S. 379-390 
    ISSN: 1573-2959
    Keywords: monitoring ; research ; CISNet ; environmental stressors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The U.S. Environmental Protection Agency (EPA), National Oceanic and Atmospheric Administration (NOAA), and National Aeronautics and Space Administration (NASA) have formed a partnership to establish pilot sites for the development of a network known as the Coastal Intensive Site Network (CISNet). CISNet is composed of intensive, long-term monitoring and research sites around the U.S. marine and Great Lakes coasts. In this partnership, EPA and NOAA are funding research and monitoring programs at pilot sites that utilize ecological indicators and investigate the ecological effects of environmental stressors. NASA is funding research aimed at developing a remote sensing capability that will augment or enhance in situresearch and monitoring programs selected by EPA and NOAA. CISNet has three objectives: 1) to develop a sound scientific basis for understanding ecological responses to anthropogenic stresses in coastal environments, including the interaction of exposure, environment/climate, and biological/ecological factors in the response, and the spatial and temporal nature of these interactions, 2) to demonstrate the value of developing data from selected sites intensively monitored to examine the relationships between changes in environmental stressors, including anthropogenic and natural stresses, and ecological response, and 3) to provide intensively monitored sites for development and evaluation of indicators of change in coastal systems.
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  • 8
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    Environmental monitoring and assessment 64 (2000), S. 409-419 
    ISSN: 1573-2959
    Keywords: monitoring ; assessment ; water ; sediment ; bioaccumulation ; toxicity ; pesticides ; mercury ; PCB
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The San Francisco Estuary Regional Monitoring Program for Trace Substances (RMP) began in 1993 and is sponsored by 74 local, state, and federal agencies and companies through their discharge or Bay use permits. The RMP monitors water, sediment, toxicity, and bivalve bioaccumulation at 25 sites in the Bay that are considered to represent "background" conditions. Several major environmental issues have been identified by the RMP. Polychlorinated biphenyls and mercury were often above water quality guidelines, and often occurred in fish tissues above U.S. Environmental Protection Agency (U.S. EPA) screening values. Concentrations do not appear to be decreasing, suggesting continuing inputs. Episodes of aquatic toxicity often occurred following runoff events that transport contaminants into the Bay from urbanized and agricultural portions of the watershed. Sediment toxicity occurred throughout the Bay, and has been correlated with concentrations of specific contaminants (chlordanes, polynuclear aromatic hydrocarbons) at some locations; mixtures of contaminants were probably also important. Since the RMP does not monitor all ecosystem components, assessments of the overall condition of the Bay cannot be made. However, in terms of contamination, the RMP samples suggest that the South Bay, and North Bay sites are moderately contaminated.
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  • 9
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    Environment, development and sustainability 2 (2000), S. 277-304 
    ISSN: 1573-2975
    Keywords: Systems of Knowledge ; Local Knowledge ; Fisheries ; Resource Management
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Sociology
    Notes: Abstract During the last 20 years, the existence of rich systems of local knowledge, and their vital support to resource use and management regimes, has been demonstrated in a wide range of biological, physical and geographical domains, such as agriculture, animal husbandry, forestry and agroforestry, medicine, and marine science and fisheries. Local knowledge includes empirical and practical components that are fundamental to sustainable resource management. Among coastal-marine fishers, for example, regular catches and, often, long-term resource sustainment are ensured through the application of knowledge that encompasses empirical information on fish behaviour, marine physical environments, fish habitats and the interactions among ecosystem components, as well as complex fish taxonomies. Local knowledge is therefore an important cultural resource that guides and sustains the operation of customary management systems. The sets of rules that compose a fisheries management system derive directly from local concepts and knowledge of the resources on which the fishery is based. Beyond the practical and the empirical, it is essential to recognise the fundamental socio-cultural importance of local knowledge to any society. It is through knowledge transmission and socialisation that worldviews are constructed, social institutions perpetuated, customary practices established, and social roles defined. In this manner, local knowledge and its transmission, shape society and culture, and culture and society shape knowledge. Local knowledge is of great potential practical value. It can provide an important information base for local resources management, especially in the tropics, where conventionally-used data are usually scarce to non-existent, as well as providing a shortcut to pinpoint essential scientific research needs. To be useful for resources management, however, it must be systematically collected and scientifically verified, before being blended with complementary information derived from Western-based sciences. But local knowledge should not be looked on with only a short-term utilitarian eye. Arguments widely accepted for conserving biodiversity, for example, are also applicable to the intellectual cultural diversity encompassed in local knowledge systems: they should be conserved because their utility may only be revealed at some later date or owing to their intrinsic value as part of the world's global heritage. At least in cultures with a Western liberal tradition, more than lip-service is now being paid to alternative systems of knowledge. The denigration of alternative knowledge systems as backward, inefficient, inferior, and founded on myth and ignorance has recently begun to change. Many such practices are a logical, sophisticated and often still-evolving adaptation to risk, based on generations of empirical experience and arranged according to principles, philosophies and institutions that are radically different from those prevailing in Western scientific circles, and hence all-but incomprehensible to them. But steadfastly held prejudices remain powerful. In this presentation I describe the 'design principles' of local knowledge systems, with particular reference to coastal-marine fishing communities, and their social and practical usefulness. I then examine the economic, ideological and institutional factors that combine to perpetuate the marginalisation and neglect of local knowledge, and discuss some of the requirements for applying local knowledge in modern management.
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  • 10
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    Environmental monitoring and assessment 64 (2000), S. 1-8 
    ISSN: 1573-2959
    Keywords: assessment ; ecology ; estuaries ; indicators ; mid-Atlantic ; monitoring ; scale ; trends ; West
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Management for the future sustainability and integrity of our nation's ecological resources requires concepts and tools for measuring status and trends in these resources at multiple spatial and temporal scales and at multiple levels of biological organization. Key elements of this process are ecologically meaningful indicators and cost-effective monitoring designs. The Environmental Monitoring and Assessment Program (EMAP) advances the science needed for measuring ecosystem condition and trends. Most recently the EMAP approach has been successfully used by participants in the Mid-Atlantic Integrated Assessment (MAIA), including EPA's Office of Research and Development, EPA's Region III, and the States of the Mid-Atlantic. The participants in MAIA have produced a regional landscape atlas, state of the estuaries report, and state of the streams report. The work in MAIA is currently moving from monitoring into the assessment phase. The Western EMAP Pilot (Western Pilot), will be a test of our current MAIA indicators and technology for applicability in western ecosystems. New indicators and designs may be needed in the Western Pilot for assessments at the level of EPA's Regions, of the states, and of the Tribes; these assessments will be done so that they can be combined to provide regional assessments. Our coastal monitoring program in the Western estuaries will also be initiated shortly. Subsequently, this will be expanded to the Gulf and Atlantic coasts to provide the current condition of our national estuaries. By continuing to improve the science of monitoring, EMAP researchers will remove data gaps and allow the unequivocal assessment of the health of the nation's resources.
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  • 11
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    Environmental monitoring and assessment 65 (2000), S. 119-127 
    ISSN: 1573-2959
    Keywords: DOAS ; Differential Optical Absorption Spectroscopy ; urban air quality ; monitoring ; vertical distribution ; ozone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The concentrations of ozone, NO2 and SO2, measured with a DOAS system 70 m above ground level in the city of Graz were compared with data from conventional ground stations. The dependence of vertical trace-gas distributions on stability categories and time of the day or year was investigated. Concerning the maximum ozone concentrations in summer, the DOAS data are representative for the ground-level situation. In average, the concentrations 70 m above ground are more than twice the ground-level concentrations. It has been shown that beside the reaction with NO, dry deposition is an important sink for ozone near the surface. The DOAS NO2-concentrations are representative for ground-level conditions in summer, except for the morning maximum of NO2. In winter the DOAS NO2-concentrations amount for 73% of the ground level values in average. Concerning the slow reacting trace gas SO2, the DOAS data are always representative for the ground-level conditions.
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  • 12
    ISSN: 1573-2959
    Keywords: mercury ; mining ; monitoring ; aquatic ; acid mine drainage ; floc ; Clear Lake ; remediation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Mercury (Hg) in the aquatic ecosystem of Clear Lake has been documented since the 1970s when fishes were found to have elevated levels of toxic methyl mercury (meHg). Mining practices at the Sulphur Bank Mercury Mine (active intermittently from 1872–1957) along the shoreline of Clear Lake included the bulldozing of waste rock and overburden ore into the shallow nearshore regions of the lake and the creation of steeply sloped piles of waste rock at the water's edge. This process, plus erosion of the waste rock piles, resulted in the accumulation of an estimated 100 metric tons of Hg in Clear Lake. A monitoring program to assess Hg in Clear Lake was established in 1992, and conducted continuously from 1994. Drought conditions in California had persisted for ca. 6 yrs prior to 1992, when the U.S. Environmental Protection Agency (USEPA) remediated the steeply sloped eroding waste rock piles, which appeared to reduce sediment Hg concentrations significantly. In April 1995, a white flocculent material was observed in Clear Lake adjacent to the mine and has been observed every year since, leading to the discovery of ongoing acid mine drainage (AMD), low pH fluids high in Hg and extremely high in sulfate. AMD is now believed to be the most likely cause of elevated meHg in Clear Lake. The discovery of this source of meHg production in Clear Lake, which will significantly influence remedial options, was only made possible by implementation of a diligent monitoring program.
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  • 13
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    Environmental monitoring and assessment 61 (2000), S. 207-229 
    ISSN: 1573-2959
    Keywords: benthos ; birds ; diatoms ; ecologicalindicators ; integrated assessment ; fish ; lakes ; monitoring ; zooplankton
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Biological indicators of communitiestypically reflect a common environmental signalreflecting the general condition of the ecosystem, as well asindividual signals by indicators differentiallysensitive to particular environmental conditions. Wedescribe here a method of integrating and interpretingsuch indicators from 19 New England lakes for fivetaxonomic groups (diatoms, benthos, zooplankton, fish,and birds). Our approach provides a systematicstandardized way to integrate multiple metrics fromdifferent taxonomic groups by addressing four elementscrucial to analyzing data from multiple indicators: covariate control, re-scaling of data, standardizing the sign of responses, and dimensional reduction. We evaluated the biologicalmetrics against individual environmental stressors andagainst multivariate physicochemical metricscharacterizing general anthropogenic stress among thelakes. The method detected a response to variationin the gross environmental condition of the lakes thatwas correlated across taxa and metrics. In addition,a differential response to near shore conditions wasdemonstrated for fish. The success of the approach inthis study lends support to its general application toecological monitoring involving complex data sets.
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  • 14
    ISSN: 1573-2959
    Keywords: monitoring ; ecosystem processes ; conceptual modeling ; indicators ; human impacts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Monitoring at large geographic scales requires a framework for understanding relationships between components and processes of an ecosystem and the human activities that affect them. We created a conceptual model that is centered on ecosystem processes, considers humans as part of ecosystems, and serves as a framework for selecting attributes for monitoring ecosystems in the Sierra Nevada. The model has three levels: 1) an ecosystem model that identifies five spheres (Atmosphere, Biosphere, Hydrosphere, Lithosphere, Sociocultural), 2) sphere models that identify key ecosystem processes (e.g., photosynthesis), and 3) key process models that identify the "essential elements"that are required for the process to operate (e.g., solar radiation), the human activities ("affectors") that have negative and positive effects on the elements (e.g., air pollution), and the "consequences"of affectors acting on essential elements (e.g., change in primary productivity). We discuss use of the model to select attributes that best reflect the operation and integrity of the ecosystem processes. Model details can be viewed on the web at http://www.r5.fs.fed.us/sncf/spam_report/index.htm(Appendix section).
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  • 15
    ISSN: 1573-3017
    Keywords: authorisation ; field research ; model ecosystems ; monitoring ; pesticides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract On request of the Dutch government a committee of the Health Council of the Netherlands has reviewed the role that results of field research in its broadest sense (i.e., including multi-species toxicity tests in the laboratory, research on model ecosystems et cetera) can play in ecotoxicological risk assessment for the authorisation of pesticides. The Committee believes that field research can provide valuable additional data about the exposure of non-target organisms and the resultant effects at population, community and ecosystem level. However, it frequently is unclear how these data might be used in reaching a decision about authorisation. To solve this problem, it is necessary to specify what is understood by “unacceptable damage”. Both more clearly formulated protection goals of the government and a better understanding of the ecological significance of effects are needed to clarify this. Furthermore, the Committee points out that the statistical power of field trials must be sufficient to allow for the detection of changes that might be regarded as ecologically relevant. Finally, it recommends keeping a finger on the pulse in relation to authorised pesticides by monitoring their presence in environmental compartments and by investigating their role in suddenly occurring mortality among conspicuous animal species, such as birds, fish and honeybees. This kind of research forms a safety net for substances that have been wrongly authorised.
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  • 16
    ISSN: 1573-2932
    Keywords: acid precipitation ; acid vain ; Atlantic salmon ; LRTAP ; monitoring ; Nova Scotia ; rivers ; toxicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The Atlantic salmon (Salmo salar) resource of eastern Canada is impacted by acid rain in the Southern Upland (Atlantic Coast) area of Nova Scotia. Salmon runs in this area have become extinct in 14 rivers, are severely impacted in 20 rivers, and lightly impacted in 15 rivers. Water chemistry and fish communities in nine Southern Upland salmon rivers were studied from 1982 to 1996 as part of the effort to monitor the effects of the emission controlprograms in Canada and the United States. There hasbeen no statistically significant change in total ioncontent of Southern Upland river water, but there wasa significant decline in sulfate levels that was balanced by an increase in organic anions, and declines in calcium and magnesium that were balanced by increases in sodium and potassium. A geochemical scenario is proposed to account for these chemical changes. River water pH levels showed no overall linear trend, but at borderline toxicity sites the year-to-year variations in pH were correlated withchanges in juvenile salmon population densities. Tenfish species were collected, but none showed anysignificant overall time trend in population density.Fish species diversity was positively correlated with pH.
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  • 17
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    Water, air & soil pollution 122 (2000), S. 93-103 
    ISSN: 1573-2932
    Keywords: base saturation ; deposition ; forest ecosystems ; monitoring ; regeneration ; soil acidification ; total acid load
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Between 1993 and 1995 a system of six intensive monitoring stations in representative stands of Norway spruce (Picea abies), sessile oak (Quercus robur) and Scots pine (Pinus sylvestris) were installed in forests of Saxony (Germany), they are integrated in the European Level II - Programme. As a complementary system, and in addition to the annual nation-wide forest decline survey, 280 sites within the forest soil condition survey (European Level I - Programme) have been examined since 1992. The results of deposition monitoring show that until 1997 the acidity in precipitation and troughfall still was very high, despite of strong reductions in industrial emissions between 1989 and 1992. The annual fluxes (hydrological year 1996) of sulphur in throughfall ranged between 16 and 77 kg-ha-1, whereas the fluxes of total inorganic N varied between 17 and 46 kg-ha-1. The forest soils show high degrees of acidification with only low base saturation. In most cases the nutrient status of the soils has to be improved in the course of a regeneration programme in order to rebuild more natural forest ecosystems.
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  • 18
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    Water, air & soil pollution 122 (2000), S. 281-297 
    ISSN: 1573-2932
    Keywords: landfill ; leachate ; monitoring ; MSW ; prediction ; refuse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Parameters such as pH, concentrations of Cl-, turbidity,NH3-N, CODCr and BOD5 (simplified as COD and BODrespectively in the following text) in leachate generated inthe large-scale testing landfill unit and closed landfill unitsat Shanghai Refuse Landfill were monitored from April 1995 toOctober 1998. The mathematical simulation formula between theseparameters and refuse age were established based on the dataobtained from the testing landfill unit and justified by thedata obtained at the closed landfill units from 1989 to 1993.The long-term predictions for the leachate concentrations forthe Landfill were made using the mathematical simulation formulaestablished. It was predicted that the COD and BOD may bereached to the strictest standard for pollution control on municipal solid wastes landfill in China, i.e., COD 〈 100 mg L-1 and BOD 〈 30 mg L-1, after 15 yr natural attenuation. The time predicted for NH3-N concentrations to reach the discharging standard, 15 mg L-1, was found to be at least 23–26 yr or even longer. The predictions for concentrations of Cl-, turbidity, and pH values in leachate are also given. The natural attenuation of Cl- is the slowest and might be decreased to 200 mg Cl- L-1, the agricultural irritation standard, after at least 58 yr.
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  • 19
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    Water, air & soil pollution 123 (2000), S. 159-166 
    ISSN: 1573-2932
    Keywords: coagulation ; Cryptosporidium ; filtration ; Giardia ; monitoring ; turbidity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The most commonly used water filtration technique involves coagulation and rapid rate filtration, either in conventional plants with flocculation and sedimentation, or in direct filtration plants in which the sedimentation process is omitted. Both versions of coagulation and filtration can be effective for controlling Giardia cysts and Cryptosporidium oocysts, but research done by several investigators has shown that coagulation and filtration must be operated very carefully to attain the best results. When filtered water turbidity is 0.1 ntu or lower, the process is most effective. Careful control of coagulation chemistry and of filtration rate increases, continuous monitoring of filtered water turbidity, and proper management of backwash water are keys to successful filtration.
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  • 20
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    Water, air & soil pollution 119 (2000), S. 139-156 
    ISSN: 1573-2932
    Keywords: aldicarb ; herbicides ; insecticides ; monitoring ; organochlorine ; organophosphate ; surface water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A survey was conducted of pesticide distribution in the water ofthe upper Jordan basin, due to the importance of its quality asthe main source of drinking water in Israel.A preliminary survey of pesticide distributers and farmersrevealed intensive use of many pesticides in agriculture. Fourof these were selected as targets for monitoring in the surfacewater of the region, at seven sampling stations. The highestresidue found was of aldicarb and its metabolites, with lowercontent of organophosphate and organochlorine insecticides. Noconcentrations reached the maximum levels permitted by the EPAfor drinking water, but recommendations were made, nonetheless,for continuous monitoring of pesticides in the region.Subsequent monitoring (1993–1997) showed a steady decrease in aldicarb residues.
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