Assessment of Pollution Carrying Capacity in the Lower Part of Mae Klong River, Thailand

Abstract

Assessment of aquatic environmental impacts, nutrient transfer and the clarification of contaminated sites were conducted based on water quality analysis of the Mae Klong River. Twelve sampling stations were surveyed between April 2015 and April 2016 covering Kanchanaburi, Ratchaburi and Samut Songkhram Provinces. Results showed that aquatic environmental factors varied seasonally. A mathematical model developed using the box modeling method showed that middle (Ratchaburi Province) and lower (Samut Songkhram Province) riverine zones were point source areas. Highest DIN and PO4 3--P loads were found in Samut Songkhram Province. Results implied that PO4 3--P levels were higher than the standard criterion for aquaculture (< 1.45 µmol L -1 ). Levels of PO4 3--P continued to increase, downriver, particularly in the estuary. Recent PO4 3--P levels suggest that the number of agroindustry plants discharging waste effluent into the river should be reduced. Monitoring to assess the aquatic status of the Mae Klong River and estuary using the PO4 3--P database is urgently required to control water quality and reduce contamination levels.

Determining the Status of the Setiamanah Reservoirecosystem in Cimahi City of West Java Province

“…The cover of disturbing aquatic plants, called aquatic weeds, is an indicator in determining water fertility. The abundance of aquatic plants on the surface will cause eutrophication due to the abundance of nutrients or nutrients from nitrogen and phosphorus [26]. The existing conditions in the Setiamanah Reservoir are not covered by aquatic plants such as water hyacinth, Kiambang and other types that can disturb the reservoir's waters.…”

“…Identification of changes in land use is very important to study because it can provide an understanding of environmental management [26]. Land use change that occurs in the water catchment area is presented in Table 8.…”

“…Each of these activities will generate waste. This waste is not managed properly but is discharged directly into the Cisangkan River water body without any prior processing [26]. Disposing of this waste directly without prior processing will affect the river water quality.…”