An on-site assessment of advanced water quality monitoring system for lake and reservoir

• Main Authors: Yueh-Shan Hsu, 徐悅珊
• Other Authors: Luke Chen
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/13392911396905973676

碩士 === 淡江大學 === 水資源及環境工程學系碩士班 === 98 === EcoMapper, a system that integrated an autonomous underwater vehicle(AUV) with water quality monitoring sensors, designed specifically for mapping water quality, water currents and bathymetry. If applied in water quality and volume monitoring in reservoir or lake, the system can provide a tool for efficient, economic and reliable monitoring. The objective of this study is to confirm the applicability of the EcoMapper system in on-site water quality and volume monitoring. The system’s stability and accuracy was assessed in the demonstration of monitoring the water quality and volume of a Devol Pond in Massachusetts. In this study, we use EcoMapper to mapping the water quality and depth of Devol Pond in comparing with the data obtained from YSI Multiparameter Sondes and Secchi disk measurement in the 15 sites and sampling at some specific sites for later analysis. The parameters considered are depth, temperature, pH, turbidity, dissolved oxygen, conductivity, chlorophyll a , TP, TN, and transparency. The results of this study indicated that EcoMapper system is an efficient, stable and accurate tool for on-site application in water quality monitoring except that the pH sensor revealed some time lag in dynamic measuring. From eutrophic indexes analysis, the water quality in Devol Pond is now in eutrophic status. The factor that cause eutrophication is believed to be phosphorus limited. The measured DO mostly are in supersaturating and alkaline state because of active photosynthesis in the daytime.