Abstract
Recently water resocues management planning is not only the physical treatment of water but also includes the various elements concerning to human environment such as the regional safety from the damage of flood, the necessity in water use, the pleasantness in the problem of water quarity and smell, and the mental substantiality in recreation planning or conservation of spectacular sight. Therefore when we discuss the problem of water resouces management we should totally evaluate the water resources considering its variety.
In this paper we shall take flood protection, water use, water quarity control in Chitose river basin, which are the main elements of water resources management, and introduce evaluating indexes as follows
1) annual expected flood damage per capita
2) danger index
3) gap per capita between supply and demand of water
4) balance of supply and demand of water
5) achievement degree of water quality criteria
And we shall regard the water resources management as the regional and purposewise distribution of public goods, and using the above indexes consider the total evaluation and its direction of river basin development.
