The purpose of this study is to evaluate the dissolved oxygen enhancement of a river through the employment of aereation equipments.Through the anaylsis of the water quality monitoring data reported by Taiwan Environmental Protection Administration (TEPA), 21 water quality monitoring stations were proposed as the candidate river sections for future possible implementation of oxygen enhancement projects. Further water quality analyses of pH, DO, BOD, NH3-N, Chlorophyll a were conducted for these selected river sections. Besides, two 24-hour on-site experimental studies for river water DO enhancement were conducted. One was implemented at the Yung-Ning Bridge section of San-Yeh River, and the other was at Rong-Shun Bridge section of An-Shun drainage channel. The water quality data obtained from these studies were further applied to the determination of contaminant degradation kinetic constants and re-aeration coefficients, and these constants were employed for water quality simulation using Qual2K and modified Streeter-Phelps equation. Additionally, these previously-selected 21 candidate river sections were further screened to obtain 10 river sections which had the highest priority for oxygen enhancement implementation. The improvement of water quality and the oxygen enhancement efficiency were estimated using Qual2K and modified Streeter-Phelps equation. The Guideline for River Oxygen Enhancement Best Applicable Technology Evaluaton and Protocol for Subsidy Allocation for River Oxygen Enhancement Projects were drafted.

Aeration technology;Air Injection System;Oxygen Dissolution System