| Abstract Submission No. | ABS-06-0369 |
| Title of Abstract | Seasonal variation of water quality parameters and its influence on primary productivity over Ennore coastal region. |
| Authors | Aswini M. A. *, Dr. Sundararajan S., Dr. B. K. Jena |
| Organisation | National Institute of Ocean Technology |
| Address | CEE, NIOT Campus, Pallikaranai Chennai, Tamil Nadu, India Pincode: 600100 Mobile: 9637337547 E-mail: aswinianirudhan.10@gmail.com |
| Country | India |
| Presentation | Poster |
| Abstract | Chennai City is the fourth largest metropolis in India, and the coastal region of this city is a typical example of sewage and severe pollution. The current study focuses on the influence of water quality parameters on primary productivity in different seasons over a region. The samples were obtained in different seasons (Southwest monsoon, pre-monsoon, and post-monsoon). The samples were chosen based on key industry discharge points in the Ennore region. We collected surface water samples and used a YSI 2030 DO metre to measure Temperature (ºC), pH, dissolved oxygen (mgL-1), and salinity (ppt). Total Suspended Solids (mgL-1) and nutrients were analysed per the standard method. The seasonal variation of primary productivity has been studied using the Chlorophyll-a (mgm-3) pigment data from Moderate Resolution Imaging Spectroradiometer. Various factors affect productivity, including the availability of DO, light, nutrients, wind, temperature and turbidity. The nutrient availability associated with upwelling and vertical mixing modulates the seasonal variation of Chl-a in the southwestern Bay of Bengal. The pH measured shows the acceptable range (7.6-8.2), the standard for aquatic life. Other than that, is a range of DO observed in the Ennore region, where Oct has the highest concentrations, followed by Feb and Nov. Another critical parameter is temperature; in-situ, observation shows the lowest in the post-monsoon season compared with the other season. Light is one of the limiting factors in Bay of Bengal water due to the riverine discharge, so the TSS value indirectly shows the availability of light on the surface of coastal water. The maximum TSS was recorded in Aug (40.3 mg/L) and Nov (40.1 mg/L), and where minimum during Oct (18.6 mg/L). These physical water quality parameters were compared with the Chl-a data to understand the favourable condition for their growth. The Chl-a, data shows a high spatial distribution of blooms in Nov, followed by Oct and Aug. In Nov, blooms can be seen inside the creek and the coastal water, Chl-a noticed>9.0mgm-3. The high variability of Chl-a was observed in the post-monsoon compared to the other seasons in the Ennore region. |
| Keywords | Primary productivity, Total suspended solids, Ennore estuary, Creek, Dissolved Oxygen |
| For Awards | yes |
| Date Of Birth | 02-01-1990 |