The flood control engineering is the preferred means against flood

but when it provides guarantee for human

it also increases people’s psychology and behavior of trust.The thesis started from the public level

selected areas along the Dongting Lake in Yueyang and the Yellow River in Kaifeng

which both suffered from serious floods in the history

as the study areas

carried out the study of public trust situation and flood risk perception

and obtained 831 pieces of effective questionnaires.The results show as follows.Public show relatively high degree of trust on the flood control engineering.The regional ana-lysis shows that the public trust on the flood control engineering has the characteristics of universality.The degree of trust on the project varies with distance of houses from the risk source such as the water area and flood embankment

gender

age

and structure of family labour force.Meanwhile

enhancement of trust on the flood control engineering will reduce the public fear and vigilance of floods.The broad trust of public to flood prevention engineering will reduce about 30%-50% of risk probability for the family.Such perception

on one hand

is negative for disaster reduction behavior

and on the other hand

is positive.Therefore

a scientific disaster prevention culture perception is helpful to guide the public to recognize the limitation of projects

and correct the bias of risk perception.