Global Journal of Biology, Agriculture & Health Sciences

Abstract

Impact of sewage and industrial pollution on the hydrographic conditions of seawater in Gwadar (East Bay), Balochistan

Rashida Qari*, Khurrum Khalid

Hydrographic conditions of seawater play an important role in the marine ecosystem. Today oceans and seas are under tremendous threat and pressures due to increase in man-made activity around the coastal areas like industrialization. To know the impact of these activities on hydrographic conditions (such as colour, temperature, salinity, pH, dissolved oxygen and biological oxygen demand) in surface seawater and deep seawater of Gwadar East Bay was studied during the month of September, 2017. For this samples were taken from six stations, three stations from each of surface seawater and deep seawater. The hydrographic parameters of seawater showed considerable tidal variations. On the basis of data it was concluded that the variations were found between all six stations of both surface seawater and deep seawater. It is also noted that significant correlations were found in between temperature, salinity and dissolve oxygen. Analysis of variance reveals that the results of each parameter were not constant but varied between stations and collection time. The present study is reveal that physic-chemical composition of Gwadar East Bay seawater depends on tidal, depth and discharge of sewage and waste materials from different sources.