Author(s): Chanwit Saiyudthong
Linked Author(s):
Keywords: Nakhon-Nayok river; Hydrodynamic model; Water Quality model; CE-QUAL-W2
Abstract: The research aims to observe and model the water quality and hydrodynamics of the Nakhon Nayok River. It had been done by collecting data on 5 points of the main stream from December 2007 to February 2009. Some of the observed data were employed to build a model by freeware named CE-QUAL-W2, widely used in USA. The study found that the Nakhon Nayok river was classified as a surface water resource type III, i. e. use for 1) water consumption with normal disinfection process and water treatment before and 2) agriculture. Consequently, by considering parameters such as BOD, TSS, TDS, TS and Conductivity, their values increased with distance. This may be mainly caused by domestic wastewater from both sides of the river. Additionally, when the observed data were compared with the simulation, the results showed that the simulated water levels were close to the measured levels. However, for the comparison of the water quality, only DO parameter obtained the similar values of the observation and calculation. For the rest, the simulation gave smaller values than the measurement. This may be caused by the boundary of the research in that it did not include flows from tributaries and domestic wastewater.
Year: 2010