Chloride Contamination on the Groundwater, Soil and Plants

High school
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Science
Pages 36 (9036 words)
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This project was carried out at the Wytch Farm Oilfield of British Petroleum. There was a leak of saline water that was flowing through a delivery line. The continued leak increased the salinity of the soil thereby, causing damage to the vegetation that was in the tree line of Wytch Heath…

Introduction

Water from sumps has been taken for measuring the surface water content and from deeper wells for sub surface water salinity. Finally, the soil was also sampled and the salinity of the soil was also measured. This was found to still be elevated though it has come down drastically on an average in all the three cases.
The sub surface water sample was normally taken after bailing out the water in the sampling wells. Similarly, the soil samples are taken at a depth of 60 centimetres in line with the standard soil sampling technique. Surface water samples were picked up from the sump that was available. The sampled values were then used for analysis to find out the rate of chloride reduction in the sub surface water and soil. This would help in indicating to what extent the vegetation can grow in the soil at the heath. It was found that the soil conditions are not particularly, right for the tree growth. Though, even up to 20000 ppm in the tree, it was found that the presence of chloride may not adversely affect tree growth. The ideal ppm, however, is 4 to 8 ppm and that is the figure really looked at for vegetation to thrive anywhere. It is therefore, important that the work is completed by reducing the presence of chlorides further. ...
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