RAINWATER COMPOSITION AT A REMOTE SEMI ARID SITE OF INDIAS. P. SIGH, P. KHARE, G. S. SATSANGI, A. LAKHANI, K. MAHARAJ KUMARI AND S. S. SRIVASTAVAAbstract Rainwater samples were collected and analyzed during monsoon 1997 at Rampur, Agra (India) which is a remote site and considered as a regional representative site. pH, major cations and anions were determined in rainwater samples. The pH ranges between 5.9 and 7.4. Total sum of cations and anions were calculated. The ionic components show cation excess (26.66 VW peq 1.1). About 74 to 84 percentile samples of rainwater have ratios of SO,/Ca, NO/Ca and Mg/Ca similar to that of soil suggesting soil is the major contributor at this site. Good correlation among Ca, Mg, NO3 and SO4 with one another may be due to the common occurrence of these species in soil. Good correlation of NH, with NO3 and SO4 suggested that they are present in rainwater as NH,NO, and (NH4) SO4. The neutralization factors were 1.63 for NH4, 1.58 for Ca and 0;19 for mg. It indicates that major neutralization occurred by NH4 and Ca.
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