In the social transformational period from the traditional agriculture society to the modernized industry society, the factors of system vicissitude, people s self-interest as well as the information asymmetry between administrative persons and the public, and so on, have been created the possibility and the opportunity for the corruption.

Calculation of river water environmental capacity under unascertained information;

A problem of allowable load of a predominant pollutant for main stream reservoir is preliminarily approached according to the theory of unascertained mathematics,on the basis of unascertained information of river hydrology and water quality.

In order to deal with unascertained information,an innovative method called unascertained number regressive is introduced to the forecasting of port handling capacity to prevent appearing distinct errors derived from lots of unascertained information.