Abstract
This study clarifies the relation between potential demand and supply of water resources in urban areas. Five areas with different activity characteristics designated case studies in Nogawa river. Result of analysis showed that, in case of rainwater supply system, only in residential area (a house type) potential demand and quality is filled, it is highly possible that it's positioned source of supply in groundwater recharge. On the other hand, large-scale park area doesn't supply enough water resources to fill a demand in urban areas. Therefore, It's preferable to arrange water supply from areas around.
