... Maintenance of feeding pond Fiscal 1999 Re-maintenance of water channel of grassy plaza Fiscal 2000 Maintenance of bank protection, Feeding pond ~ Matsugaoka entrance Fiscal 2001 Maintenance of water ... plaza, Multi-purpose plaza, Strolling road, etc. Water area About 7.9 ha* Island Japanese island type (1.4 ha*) Pond capacity About 100,000 m 3 * Water depth Average 1.29 m* Purpose of utilization ... H. Tanaka, Y. Komori, M. Sasaki. Jianhua. Li, J. Wada(2003). Investigation relating to mass transfer between bottom mud and water. Data by National Institute for Land and Infrastructure Management,...