Abstract
We investigate environmental ethics of river engineers who have many problems about conflicts river improvement works and nature-conservation movements with questionnaire. In this paper, we report a variety of troubles related to the conflicts which most of the engineers who answered the questionnaire. We classify the described concrete troubles into some categories (Negotiation and decision making, Construction cost, Evaluation method of nature and etc.) and show you some typical examples of the troubles. Finally we discuss what we have to do to find out a solution of the conflicts.
