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  • 1
    Electronic Resource
    Electronic Resource
    Wet-only and bulk deposition studies at New Delhi (India) (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2137-2142 
    Details
    ISSN: 1573-2932
    Keywords: Wet-only ; Bulk samples ; Neutralization factors ; Soil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Rain water samples were collected at New Delhi during the monsoon of 1994 at a height of 30 m above the ground level using a wet-only collector. Simultaneously, bulk samples from two different heights at 30 m and 13 m were collected. Frequency distribution of pH in wet-only samples revealed that rain was mostly alkaline Four out of 23 events were observed to be acidic where the ratio of (Ca+Mg+NH4)/(SO4+NO3) was very low. pH and ionic constituents were higher in bulk samples than in wet-only samples. On an average, the concentration in bulk samples at 30m height exceeded the wet-only samples by 13% while bulk samples collected at 13m height had 19% higher concentration than the bulk samples at 30m height and 32% higher than wet-only. The acidity of ram water was mainly contributed by sulphuric acid rather than nitric acid. At the height of 30 m, the acidity was primarily neutralized by NH4 while at 13 m height, it was buffered by Ca and Mg indicating the influence of dust particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186150
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A study on short-time sampling of individual rain events at New Delhi during monsoon, 1994 (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2143-2148 
    Details
    ISSN: 1573-2932
    Keywords: rain event ; pH ; intensity ; crustal ; antecedent periods
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Rain water samples of equal volume (50 mL) were collected from two couvective showers at New Delhi on 28 July and 23 August during the monsoon, 1994. The variation of constituents of both the showers showed different trends which might have been due to different antecedent periods. The first shower occurred after an antecedent period of 2–3 hours while the second shower occurred after a 14 day interval. The first shower had acidic pH (〈5.6) and relatively higher concentration of NH4, SO4, NO3, Cl, F and K indicating insignificant below cloud scavenging. The second shower had alkaline pH (〉5.6) and relatively higher concentrations of Ca and Mg. The higher concentration of Ca and Mg in the second shower were due to the loading with particulate matter during the preceding 14 days which made below cloud scavenging significant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186151
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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