Cray Relational Analysis of Expansive Soil Slop Moisture Influence Factors

The expansive soil slop moisture changes were viewed as a gray system.Based on the gray system theory relational analysis method,the meteorological station conventional meteorological data was thought about as the influence factors of expansive soil slop moisture changes to comprehensively analyze the plus-minus conjunction features of each influence factor to moisture changes and then to calculate the synthesis relational indexes which influenc the soil layer moisture change.