1. Introduction
It has a lot of problems in the river. The rivers of
the problem is Illegal dumping of garbage, flooding and
flooding of rivers, and damage to the levees and bridges.
River information of the problem is necessary for respond
to the problem. River basin is a wide range. Only river
administrator to manage the river, it is difficult to perform
adequate surveillance and response.
The river administrator is important to carry out the
monitoring of a wide range of river basin by utilizing the
information provided from the surrounding residents of the
river basin in order to strengthen the monitoring system. If
you receive the information provided from the surrounding
residents of the river basin, it is to occur, such as can not
accurately grasp the problem situation in the provision of
information verbally.