Estuary of the River Mersey : The effect of the discharge of crude sewage into the estuary of the River Mersey on the amount and hardness of the deposit in the estuary.
- Great Britain. Water Pollution Research Board
- Date:
- 1938
Licence: Public Domain Mark
Credit: Estuary of the River Mersey : The effect of the discharge of crude sewage into the estuary of the River Mersey on the amount and hardness of the deposit in the estuary. Source: Wellcome Collection.
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![TABLE 75—Effect of Vigorous Stirring with Sewage on Rate of Sedimentation of Mersey Muds Salinity of Water approximately 25 gm. per 1,000 gm. Muds settled through a Depth of 10 cm. S = Mersey Mud SM = Mersey Suspended Matter Coneeitas ee Percentage of mud remaining in suspension eee ay Length an ot sete at a depth of 10 cm. after : Sample (gm. dr ue tee sewage ede ae te stirred ae 100 litres). co) (per cent.). Be oY : a . P min. min. = he hrs. hrs. SM41 a 15-0 2 0 80 43 27 10 3 * | ‘ 2 5-0 24 11 3 5 3 SM42 eal 12-8 1 0 94 74 63 39 30 5 a0) 70 26 16 8 5 SM44 oy 14-3 1 0 71 48 38 22 14 3 ‘ I 5-0 78 46 24 13 6 SM46 - 1225 4 0 78 58 26 20 14 3 + 5:0 76 15 Z 5 4 SM59 aye 17:8 1 0 76 4] 32 19 18 ‘> MF 1 axel 82 51 28 20 14 Fe e 2 0 77 38 25 18 13 - y 5-0 32 18 16 15 18 e 7 0 v1 51 39 22 18 3 ‘; | 5:0 33 18 it 6 8 ‘ 14 0 84 56 29 aL 20 »» :; 14 5:0 _ 18 10 8 7 y, ; 19 0 89 59 39 27 25 r ie 5:0 67 22 14 10 8 y» 26 0 85 60 31 16 18 ; 26 5-0 77 29 8 6 0 SM52 at 13-1 + 0 85 47 13 3 6 . 4 5°0 44 5 3 3 1 SM53 9-8 1 0 78 - 50 27 28 18 1 5-0 76 26 10 10 < ) 0 84 49 23 10 6 5) 5:0 33 23 10 0 0 | 13 0 56 17 0 0 0 ; 13 5-0 51 1 1 0 0 | 18 0 66 12 1 1 i | 18 5:0 60 14 9 1 0 0 ae 25 0 65 1 0 0 0 r se ss 25 5:0 76 1 1 1 1 SM65 es 33°9 us 0 61 19 16 Wet 8 r» 2 0-25 63 21 13 Lb fi »» 2 hres 53 19 12 9 8 rs 5 Z 1-0 59 14 10 7 5 r» 2 270) 38 10 6 4 3 r» . i 2 5-0 40) ie 8 4 3 SM69 ae 10:7 1 0 69 51 15, wis 11 - 5 d 0:25 76 35 9 9 3 i 1 0-5 54 28 7, 6 a r» i 1 1:0 74 53 30 16 9 r ; 1 2:0 67 54 31 16 11 * 1 5:0 og ah 32 27 16 ; 2 0 82 50 18 11 10 ) 2 0-25 86 34 17 8 9 2 0-5 85 35 21 8 2 r 2 1-0 83 23 16 7 7 » : 2 20 70 Ly) 8) 6 4 ” ” if Ye 5:0 aS 21 8 6 3 | i](https://iiif.wellcomecollection.org/image/b32171869_0330.jp2/full/800%2C/0/default.jpg)
