Author(s): Satomi Ura; Masato Noguchi; Wataru Nishida; Yuichi Suemitsu
Linked Author(s):
Keywords: Constructed wetland; Diffuse pollution; Reed; Total Nitrogen; Water quality management
Abstract: Recently, importance of the integrated management including river and its watershed has been recognized for many cases. At Isahaya of Nagasaki, Japan, a big project called the construction of sea-dyke and reclamation project is now carried out. Here, there are lots of things, which must be discussed, elaborately. At the same time, attaining the sound and sustainable development, many problems should be corresponded. Regarding the water environment of the closed water bodies, pollutant runoff loads have to be reduced, using several kinds of facilities called the Best Management Practices (BMPs), especially considering the bad influences to the environment under the wet weather condition. From the point of view mentioned above, the rate of runoff loads of pollutant is first evaluated from both of the point and non-point sources, using a simplified model. Appropriateness of the predicted data has been checked, investigating the agreement with the observed one. Here, because of the prevention and/or mitigation of “eutrophication”, Total Nitrogen (T-N) has been picked up as one of the water quality indices, which is a typical index of nutrient. After an overall estimation of pollutant runoff loads, available Best Management Practices is discussed, in order to consider the application to Isahaya area.
Year: 2005