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 17.—pH Value of the Estuary Water and of some Fresh-Water Streams which discharge into tt pH value. / No. of / samples. | Mean. Maximum. Minimum. | River Alt I 6-6 — — Dibbin Brook 1 7°6 oe | a River Gowy 1 7:2 — | a Rams Brook 1 7:8 = | == Ditton Brook 2 8:0 8-1 7:8 / Sankey Brook .. 56 8+] 8:6 7:0 River Mersey at Howley Weir. . 30 72 7:3 6:8 | River Mersey at Warrington | Bridge 8 7-2 7°4 6-8 | Mersey Estuary — Salinity 0-5 27 7:2 | 7°3 ri 5-10 3 7:3 | 7:6 7-2 10-15 8 7:4 7°8 73 15-20 37 7°*6 a 72 20-23 23 a7 | 8-2 7°3 23-26 e yi 56 7a 8-2 7°2 26-29... a3 121 7°8 8:3 7°4 > 29 a ot 158 8-0 8-4 7°3 SUMMARY The distribution of salinity in the Estuary at high and low water of spring and neap tides is described. There is no pronounced difference between the salinity of the water at different depths in any part of the Estuary. The concentration of dissolved oxygen at any given position is very variable. In the greater part of the Estuary water the mean value lies between 60 and 100 per cent. of the saturation value. The lowest concentrations are found in the shallow reaches above Widnes, where often at low water there may be little or no dissolved oxygen. The results of determinations of the concentration of free and saline ammonia, soluble organic carbon and sulphide are given. The concentrations of these substances, which may be regarded as indicators of the presence of polluting material, were greatest in the higher reaches, and fell off in the more seaward part of the Estuary. No abnormal values of hydrogen ion concentration were found in any part of the Estuary. REFERENCES ) ALEXANDER, W.B., SouTHGATE, B. A., and BassINDALE, R. Survey of the River Tees. Part II. The Estuary—Chemical and Biological. Department of Scientific and Industrial Research, Water Pollution Research Technical Paper No. 5. Price 9s. H.M. Stationery Office, 1935. @) Harvey, H. W. Biological Chemistry and Physics of Sea Water. University Press, Cambridge, 1928. D 4](https://iiif.wellcomecollection.org/image/b32171869_0065.jp2/full/800%2C/0/default.jpg)
