Abstract：
The composition of atmospheric deposition is a measure of air quality, an important aspect of the health of the ecosystem. Consequently, continuous monitoring of atmospheric deposition is crucial to obtain remedial measures to avoid undesirable aspects that would affect living things. In this context, the objective of this study was to determine the rainwater quality at selected locations in Kandy and Peradeniya area of Sri Lanka, namely, Kandy, Polgolla, and University of Peradeniya (UOP), and to identify possible correlations between quality parameters through statistical means. Forty (40) rainwater samples from the UOP site and seven (07) samples each from the Kandy and Polgolla sites were collected from 18 May 2020 to 28 April 2021. The volume-weighted average (VWA) pH values of UOP, Kandy, and Polgolla sites were determined to be 7.44, 7.19, and 7.19, respectively, and moreover, acid rain (pH < 5.6) occurrences were not detected during the sampling period. The VWA values of rainfall, conductivity, salinity, TDS, and hardness at the UOP site were 40.12 mm, 51.93 μS cm-1, 0.0300 ppt, 26.59 mg L-1, and 13.55 mg L-1, respectively. The corresponding values of the Kandy site were 16.52 mm, 64.04 μS cm-1, 0.0361 ppt, 30.80 mg L-1, and 19.49 mg L-1, respectively; and those of the Polgolla site were 33.10 mm, 53.90 μS cm-1, 0.0310 ppt, 25.76 mg L-1, and 19.31 mg L-1, respectively. The VWA values of conductivity, salinity, and TDS were the highest at the Kandy site. Further, the VWA values of hardness at Kandy and Polgolla sites were approximately equal, probably due to the spring of Ca2+ and Mg2+ particulates from the dolomite quarry located in Digana area. The most prominent anion was identified as Cl- in bulk deposition at all three sites, while NO3- showed the lowest concentration of all sites. Moreover, very strong significant positive correlations were identified between conductivity-TDS, conductivity-salinity, conductivity-hardness, TDS-hardness, TDS-salinity, salinity-hardness, SO42--Cl-, and NO3--Cl- according to the relevant Pearson correlation coefficients. It is thus concluded that the pollutants come from the same sources, either natural or anthropogenic.
摘要：
大气沉积的成分是衡量空气质量的指标,生态系统健康的一个重要方面。因此,持续监测大气沉积对于采取补救措施以避免影响生物的不良方面至关重要。在这种情况下，这项研究的目的是确定斯里兰卡康提和Peradeniya地区选定地点的雨水质量，即,康提,波尔戈拉,和Peradeniya大学（UOP），并通过统计手段确定质量参数之间可能的相关性。从2020年5月18日至2021年4月28日收集了来自UOP站点的四十（40）个雨水样本和来自康提和波尔戈拉站点的七（07）个样本。UOP的体积加权平均(VWA)pH值，康提,和Polgolla位点分别确定为7.44、7.19和7.19，而且,在采样期间未检测到酸雨（pH<5.6）发生。降雨量的VWA值，电导率，盐度,TDS,UOP部位的硬度为40.12mm，51.93μScm-1,0.0300ppt,分别为26.59mgL-1和13.55mgL-1。康提场地的相应数值为16.52毫米,64.04μScm-1,0.0361ppt,分别为30.80mgL-1和19.49mgL-1；Polgolla位点的大小为33.10mm，53.90μScm-1,0.0310ppt,分别为25.76mgL-1和19.31mgL-1。电导率的VWA值，盐度,TDS在康提现场最高。Further,Kandy和Polgolla位点的VWA硬度值大致相等，可能是由于位于Digana地区的白云石采石场中Ca2和Mg2颗粒的春天。在所有三个位点的大量沉积中，最突出的阴离子被确定为Cl-，而NO3-在所有站点中浓度最低。此外，电导率-TDS之间具有很强的正相关性，电导率-盐度，电导率-硬度，TDS-硬度,TDS-盐度,盐度-硬度，SO42--Cl-,和NO3--Cl-根据相关的皮尔逊相关系数。因此得出结论，污染物来自相同的来源，无论是自然的还是人为的。
