Radiological and Environmental Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India.
Center for Environmental Nuclear Research, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, India.
Environ Monit Assess. 2021 May 28;193(6):366. doi: 10.1007/s10661-021-09115-w.
A study was carried out in the coastal waters of Kalpakkam with the objectives to evaluate the seasonality in hydrobiological parameters in surface and bottom waters, and assess the anthropogenic stress and monsoonal flux on a spatiotemporal scale. The study covered an area of approximately 100 km in the coastal environment. Relatively high values for pH, temperature, and TP were observed during the post-monsoon (POM) season. The monsoon (MON) season was linked with TN, ammonia, and DO concentrations as all these parameters have shown increased values during this season due to freshwater input. The summer (SUM) season was characterized by salinity, turbidity, nitrate, phosphate, and silicate, indicating a true marine environmental condition for plankton production. Principal component analysis (PCA) and cluster analysis (CA) indicated the presence of distinct coastal water masses with respect to seasons and sampling regions. The spatial pattern indicated the distinctness of the coastal nearshore water (CNW) and coastal offshore water (COW) with respect to water quality. The CNW was more dynamic due to direct external influence as compared to the relatively stable COW environment. Similarly, the study region in the northern part, which is continuously exposed to the backwater inputs and tourism activities, was statistically different from the southern part.
一项在卡尔帕卡姆沿海海域进行的研究旨在评估表层和底层水中水生物学术参数的季节性变化，并评估人为压力和季风通量在时空尺度上的影响。该研究覆盖了沿海环境约 100 公里的区域。在后季风（POM）季节，观测到 pH 值、温度和 TP 值相对较高。季风（MON）季节与 TN、氨和 DO 浓度有关，因为由于淡水输入，所有这些参数在本季都显示出增加的数值。夏季（SUM）季节的特征是盐度、浊度、硝酸盐、磷酸盐和硅酸盐，表明浮游生物生产的真正海洋环境条件。主成分分析（PCA）和聚类分析（CA）表明，根据季节和采样区域，存在着明显不同的沿海水团。空间模式表明，沿海近岸水（CNW）和沿海外海水（COW）在水质方面存在明显差异。由于受到直接的外部影响，CNW 比相对稳定的 COW 环境更加动态。同样，由于受到回流水输入和旅游活动的持续影响，北部研究区域在统计学上与南部区域不同。
