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Table 3 Monthly variation of light availability parameters in Sundarban estuary

From: Physicochemical and biological factors controlling water column metabolism in Sundarbans estuary, India

Month Suspended Particulate Matter (mg/L) Turbidity (NTU) Secchi Disc Index (cm) Light Attenuation Coefficients
November 172.1± 5.6 55±5.0 52.2±2.2 0.030
December 144.5± 4.2 48±5.5 61.5±2.1 0.025
January 129.4± 3.6 39±4.8 70.0±2.6 0.022
February 117.3± 4.6 25±5.3 78.0±1.8 0.020
March 87.8± 5.4 25±0.6 137.5±3.9 0.011
April 95.8± 5.6 24±0.4 169.6±4.2 0.009
May 73.4± 3.2 23±0.4 174.1±4.5 0.009
June 57.5± 6.2 20±0.8 185.3±5.6 0.008
July 186.5± 6.9 57±4.8 51.2±2.2 0.030
August 230.8± 2.7 110±3.2 24.5±1.1 0.060
September 234.2± 5.9 114±2.5 22.6±1.2 0.069
October 248.4± 6.9 125±6.2 20.0±1.1 0.078
  1. Each value represents mean of 180 samples.