论文信息 - Acid deposition and critical load analysis in Agra, India.

Acid deposition and critical load analysis in Agra, India.

The deposition of sulphur (161.1 eq.ha(-1) per year), nitrogen(49.9 eq.ha(-1) per year), and ammonium (176.8 eq.ha(-1) per year) from the atmosphere were calculated for both wet and dry deposition in Agra region of India. Seven sampling sites located at Bichpuri, Bah, Fatehabad, Shamsabad, Nunhai, Dayalbagh, and St. John's College were used. The values for critical load of sulphur and nitrogen for soil with respect to Hibiscus (Hibiscus rosa-sinensis) and Black siris (Albizzia odoratissima) were calculated. The methodology employed involved the steady state mass balance (SSMB) method. The values of actual acidity were compared with the RAINS-Asia model. On comparing the acidity, it was found that the values computed by RAINS-Asia model are higher for this area.

[1] C. Ro,et al. Wet and dry deposition of sulfur and nitrogen compounds in Ontario , 1988 .

[2] B. Hicks,et al. A preliminary multiple resistance routine for deriving dry deposition velocities from measured quantities , 1987 .

[3] E. Voldner,et al. Monthly mean spatial variations of dry deposition velocities of oxides of sulphur and nitrogen , 1986 .

[4] Y. Iwasaka,et al. Rapid change in nitrate and sulfate concentrations observed in early stage of precipitation and their deposition processes , 1996 .

[5] B. Hicks,et al. Dry deposition inferential measurement techniques—I. Design and tests of a prototype meteorological and chemical system for determining dry deposition , 1991 .

[6] Panayotis A. Siskos,et al. Rainwater composition in Athens, Greece , 1990 .

[7] G. Stewart,et al. The deposition of atmospheric ammonia and its effects on plants. , 1993, The New phytologist.