dc.description.abstract | Algal reef is widely distributed along seashorein NW Taiwan. Guanxin algal reef, the most completelydeveloped, is selected as the study area. Coral reef grew on old Shihmen gravel alluvial fan ever since 7500 years ago, and algal reef became the dominant biotic reef since about 4500 years ago. It is developed from north to south for 5km long, including Shiaufanli river, Shinwu river and Houhu river estuaries. In order to know the influence factors of water quality which affected the growing of algal reef, water samples were collected and analyzed concerning their temporal and spacial variations. Three samplingsites were 2.5km away, every sites were divided into near shore and near wave. Seawater qualities were examined every month by using a water quality analyzer, so as to evaluate the growing environment of algal reef. Furthermore, detailed water quality data were collected from Taoyuan City document, thus to find the correlation among17 parameters, along nearby Xinwu river, Guanyin river and Shetz river during the same period. It contrasted upstream and downstream at the same time on Xinwu river. Factor analysis was then performed to convert the massive and complicated elements into comprehensive factors which affected the growth of algal reef. The result of this study indicates that the major factors are "organic matter in water", "water quality visibility", "ionic quality visibility",and “hydration reaction rate”. The results are expected to be valuable in the preservation and protection of Guanxin algal reef. | en_US |