Abstract:
The Bangpakong estuary is an area where many fishery manufactures have been operated; as a result it is the vulnerable area in which various waste products including physical, chemical and biological waste products have accumulated and contaminated with the water in this area. This may affect the chains of food and ecological system of this area. Therefore, this research objective is to identify the effect of physical environment factors to the survival of Fecal Coliform and Fecal Streptococci. Then, The appropriate selection of Fecal Coliform and Fecal Streptococci indicator for identification of water quality in estuary will be based on the data obtained for this study. This study comprises of field work and laboratory activates. In the field the samples of water were collected from different areas in relation to the mount of the river such as at the estuary itself and at the points of 2.2, 5, 8 and 12 kms from the middle of the river, and at the 50 cm above the riverbed in three seasons - hot, rainy and cool seasons. In the laboratory phase, all samples were analyzed after and experimentation in the microcosm model. The study revealed that temperature, electrical conductibility, saltiness and all dissolved solid has a positive relationship with Faucal streptococci whereas it has a negative relationship with Fecal coliform. The result of laboratory showed that sunshine and saltiness affect to survival of Fecal coliform and Fecal streptococci. It also showed that at the salty level of 1, 10 ,20 and 30 per thousand, the Fecal streptococci was able to have better survival than the Fecal coliform