Table 2.

SPM concentrations of the Ashtamudi lake for different periods.

Date of Acquisition	SPM concentration				Remarks
	Minimum	Maximum	Mean	SD
2/14/2015	8.16	27.19	12.02	1.50	Previous Years
2/01/2016	3.75	24.55	9.79	2.79
2/03/2017	3.76	21.42	9.56	3.43
2/06/2018	4.88	21.54	9.23	2.19
2/25/2019	4.27	32.76	11.88	3.32
2/12/2020	2.97	28.89	10.03	2.48	Pre-lockdown period
4/16/2020	3.65	23.61	8.01	1.59	During lockdown period