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Pathlines of pollutant migration in groundwater of the Visakhapatnam urban area, India

✍ Scribed by N. Subba Rao; V. V. S. Gurunadha Rao

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
391 KB
Volume
13
Category
Article
ISSN
0885-6087

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✦ Synopsis

The groundwater regime in the north-western part of the Visakhapatnam urban area was polluted as early as 1981 by discharge of untreated industrial euent from a Hindustan Polymers Limited (HPL) plant. A total dissolved solids (TDS) concentration of sur®cial euent up to 6500 mg/l and of groundwater in the range 3000±4200 mg/l has been reported in the environs of the HPL plant during May 1992. Groundwater occurs under water table conditions. The groundwater ¯ow model was simulated as a single layer aquifer, using MODFLOW and FLOWPATH computer models. Aquifer parameters were estimated and the value of eective porosity assumed. The water table con®guration was mapped in May 1981 using 33 observation wells. The calibrated hydraulic head distribution was used to compute the velocity ®eld using the eective porosity values. The ¯ow paths of groundwater migration from the source locations up to 2002 AD were predicted. Pathlines of particles in the groundwater indicated a predominant north-east and south-west migration of groundwater pollution in the area.

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