Geographic information systems and multivariate analysis to evaluate fecal bacterial pollution in coastal waters of Andaman, India
| Autor: | Marimuthu Prashanthi Devi, Nambali Valsalan Vinithkumar, Palaiyaa Sukumaran Dheenan, Apurba Kumar Das, Dilip Kumar Jha, Ramalingam Kirubagaran |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010504 meteorology & atmospheric sciences
Health Toxicology and Mutagenesis India Fresh Water 010501 environmental sciences Toxicology Monsoon 01 natural sciences Feces Urbanization Environmental monitoring Seawater Water Pollutants 0105 earth and related environmental sciences Hydrology Bacteria Land use Agriculture General Medicine Contamination Pollution Fecal coliform Bays Multivariate Analysis Geographic Information Systems Environmental science Environmental Monitoring |
| Zdroj: | Environmental Pollution. 214:45-53 |
| ISSN: | 0269-7491 |
| DOI: | 10.1016/j.envpol.2016.03.065 |
| Popis: | Urbanization of coastal areas in recent years has driven us to consider a new approach for visually delineating sites that are contaminated with fecal bacteria (FB) in the coastal waters of the Andaman Islands in India. Geo-spatial analysis demarcated harbor, settlement, and freshwater/discharge influenced zones as hot spots for FB, while the open sea was demarcated as a cold spot. The land use types, such as developed and agriculture, with more anthropogenic activities increasing the FB counts while open sea showed the least FB. Box whisker plot indicated an increasing FB trend in the coastal waters during monsoon. Furthermore, principal component analysis revealed 67.35%, 78.62% and 70.43% of total variance at Port Blair, Rangat and Aerial bays, respectively. Strong factor loading was observed for depth (0.95), transparency (0.93), dissolved oxygen (0.93) and fecal streptococci (0.85). Distance proximity analysis revealed that fecal contaminations diluted significantly (P |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect