Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Surface-waters: chemistry

Driscoll, C.T., Aluminum in acidic surface waters Chemistry, transport and effects, Environ Hlth Persp 63, 1985,93-104. [Pg.87]

Average Surface Water Chemistry of 20 High-Altitude... [Pg.120]

In order to verify whether atmospheric deposition directly affects surface water chemistry of high-altitude Alpine lakes, trend analyses were performed for 20 mountain lakes with low alkalinity on the key variables involved in acidification and recovery alkalinity (Gran alkalinity), pH, sulphate, nitrate, base cations (calcium + magnesium). The analysis covers the period 1980-2004 and allows a comparison between atmospheric inputs and surface water quahty. [Pg.130]

Environmental Protection Agency, Response of Surface Water Chemistry to the Clean Air Act Ammendments of 1990 (EPA 620/R-03/001, Jan. 2003, p. 18). http //www.epa.gov/ord/htm/CAAA-2002-report-2col-rev-4.pdf... [Pg.135]

Evans C. D., Monteith D. T., and Harriman R. (2001c) Longterm variability in the deposition of marine ions at west coast sites in the UK acid waters monitoring network impacts on surface water chemistry and significance for trend determination. Sci. Tot. Environ. 265, 115-129. [Pg.4940]

Interpretation of trends in acidic deposition and surface water chemistry in Scotland during the past three decades. Hydrol. Earth Syst. Sci. 5, 407—420. [Pg.4941]

Norton S. A. and Kahl J, S. (2000) Impacts of marine aerosols on surface water chemistry at bear brook watershed, Maine. Verh. In. Ver. Limnol. 27, 1280-1284. [Pg.4943]

It is well known that the total content of water-soluble solids in natural waters (TSS) is increasing with an increasing aridity. The concentration of some trace elements correlates significantly with the total content of soluble solids (see Chapter 4, Section 4, for boron, for example). Comparison of the trace element contents in surface waters in the area of East European Plain has shown certain relationships between surface water chemistry and ecosystem types. These data are summarized in Table 30. [Pg.285]

Trott, L.A. and Alongi, D.M. (1999) Variability in surface water chemistry and phytoplankton biomass in two tropical, tidally dominated mangrove creeks. Marine and Freshwater Research, 50, 151 15 7. [Pg.39]

Stoddard, J.L., Kahl, J.S., Deviney, F.A., DeWalle, D.R., Driscoll, C.T., Herlihy, A.T., Kellogg, J.H., Murdoch, P.S., Webb, J.R. and Webster, K.E. (2003). Response of Surface Water Chemistry to the Clean Air Act Amendments of 1990, U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Research Triangle Park, N.C. [Pg.58]

Sullivan, T.J. (1991). Long-term temporal trends in surface water chemistry. In Acidic Deposition and Aquatic Ecosystems Regional Case Studies, Charles, D.F. (Ed.), Springer-Verlag New York, pp. 615-639. [Pg.58]

One factor that has been linked with long-term changes in the chemistry of surface waters and soils is the influence of variations in weather, particularly temperature and precipitation. The variability that fluctuations in weather induce in surface water chemistry (Hindar et al. 2003) may obscure the detection of trends resulting from reductions in SO/ deposition. On the other hand, use of long-term data may obscure shorter trends occurring within the series, particularly if the trends are not uni-directional. In this case, the detection of trends may be dependent on the time window used in the analysis, and can affect both the detection of the presence and the direction of a trend (Clair et al. 2002). For example, Clair et al. (1992) found significant decreases in SO/ concentrations in lakes in Nova Scotia, Canada, for the period 1983-1989, but with the addition of two more years of data, many of these trends were reversed (Clair et al. 1995). [Pg.60]

Table 5.1 classifies how chemical regimes meet in the climate system. We see that almost normal conditions occur and extreme low and high temperatures border the climate system. The chemistry described in the following chapters concerns almost these normal conditions of the climate system. We focus on the troposphere and the interfaces. For example, aqueous phase chemistry in cloud droplets does not differ principally from surface water chemistry (aquatic chemistry) and much soil chemistry does not differ from aerosol chemistry (colloidal chemistry). Plant chemistry, however, is different and only by using the generic terms (Chapter 2.2.2.S) of inorganic interfacial chemistry can we link it. The chemistry of the atmosphere is widely described (Seinfeld and Pandis 1998, Wameck 1999, Finlay-son-Pitts and Pitts 2000, Wayne 2000, Brasseur et al. 2003) and the branches in atmospheric chemistry are well defined (Fig. 5.2). [Pg.460]

When looking at Colby s publications, it becomes obvious that he considered journal papers as unsuitable for his works. Instead, most of his research is published in Reports of the USGS or the US Department of Agriculture. This characteristics was reflected in his personality A person who did not want to generalize findings but applied these to detailed studies, both in time and in location. Colby also exclusively worked in the narrow field of sediment mechanics, yet his knowledge was so profound that he counted among the then top American experts. He further took interest into the relation of sediments and the surface water chemistry, the effect of sediment on scour, or the effects of sediment transport on the velocity patterns in sand-bed streams. [Pg.180]

The RAINS Lake Model RLM (Kam and Posch, 1987) assumes that only a few reactions between the soil and soil solution need to be considered to describe surface water chemistry. These include relationships between soil base saturation and soil solution pH and between the soUd and liquid phases of aluminium. The change in base cations and therefore base saturation is determined by the movements of acids and bases into and out of the soil. This change is defined as ... [Pg.288]

The quantitative relationship between acid deposition rates and changes in surface-water chemistry is still not fully understood, although the existence of acidification associated with acid deposition is widely accepted. The primary purpose of this section is not to quantitatively address the effects of acid deposition, but instead to give an overview of the atmospheric transport and transformation processes that lead to its existence. [Pg.407]

Methodology Clair, T.A., ef al 1995. "Regional precipitation and surface water chemistry trends in southeastern Canada (1983-1991) " Canadian Journal of fisheries and Aquatic Sciences 520/ 797—212. [Pg.30]


See other pages where Surface-waters: chemistry is mentioned: [Pg.279]    [Pg.169]    [Pg.120]    [Pg.125]    [Pg.130]    [Pg.2430]    [Pg.2465]    [Pg.4919]    [Pg.375]    [Pg.296]    [Pg.414]    [Pg.326]    [Pg.955]    [Pg.1030]    [Pg.47]    [Pg.73]    [Pg.75]    [Pg.23]    [Pg.380]    [Pg.288]   
See also in sourсe #XX -- [ Pg.125 , Pg.130 ]




SEARCH



Surface chemistry

Water chemistry

© 2024 chempedia.info