... nakasone@mx.ibaraki.ac.jp ABSTRACT A distributed water quality tank model was developed to evaluate nitrogen load reduction by artificial wetlands in the A1 0 area, located in the Lake ... the A1 0 area, located in the Kasumigaura watershed in Japan (Fig. 1). Lake Kasumigaura is the second largest lake in Japan. Its water resources are used for municipal, domestic, industrial and ... Kuroda *2 and H. Nakasone *3 * Faculty of Agriculture, Ibaraki University, 3-21-1 Chuoh, Ami, Inashiki, Ibaraki 300-0393, Japan 1. tkato@mx.ibaraki.ac.jp, 2. kuroda@mx.ibaraki.ac.jp, and...