Summary of Abstract Submission

Abstract Submission No. IO50-03-0047PresentationPoster


Robin R.S.*1, Purvaja Ramachandran1, Yogeshwari S1, Marimuthu N1, Hariharan G1, Debasis Tudu1, Semanti Paul 1, Ramesh R*1

1 National Centre for Sustainable Coastal Management, MoEF&CC, India


Increasing pollutant inputs to coastal waters have been associated with rising human population, changes in land use, coastal developmental activities and the intensification of domestic and industrial waste, and agricultural effluents. The pollution status and its extent on coastal waters can be determined by computing Water Quality Index (WQI) based on assessing water quality parameters (WQP). As a part of the state of coast report along the coast between the West (Goa) and Southeast (Thoothukudi) coast of India (~1100 km), a survey was carried out by undertaking a cruise on CRV Sagar Purvi during January 2015. The highest WQI observed along the Tamil Nadu coast indicates that the quality of water in this region is very good (Grade A: 80-90), whereas the coastal waters along Goa was graded Grade B+ (78-80). The coastal waters of Kerala and Karnataka were observed as Good with Grade B (60-80). Principal component analysis of the data indicated that the components which played a major role included Total Suspended Matter (TSM) and Chlorophyll-a, followed by Inorganic phosphate, Dissolved organic carbon (DOC), Salinity, pH, Nitrite, Dissolved oxygen and Oxygen saturation between this coastal stretch. Bray-Curtis similarity analysis provided a sequence of four groups of coastal sites confirmed by Multidimensional Scaling (MDS) plots. Based on observed score of WQI, significant impacts on the coast was predominantly from river input, industrial and municipal discharges, formation of mud banks that enabled adsorption and desorption characteristics of nutrients and buffering action of sediment under varying environmental conditions.