Based on analyzing the historic literature and the grain size and the susceptibility for 110 samples in the Gaoling Weihe river floodplain

the character of magnetic susceptibility was researched whthin the depth of 4.0m near 120 years.According to the analysis some conclusions have been summarized as follows: there is a obvious change rhythm of susceptibility in the Gaoling Weihe river and the profile is divided into 6 stages

the 1st

3rd

5th frequency dependent susceptibility are higher than the 2nd

4th

6th ones.The susceptibility and sediment have a good relation

which is the frequency dependent susceptibility lower and the size of sediment thiner.On the contrary the conclusion is opposition.At the same time the frequency dependent susceptibility reflact the flood changes.The flood depth and scale of the 1st

3rd

5th are biger than the 2nd

4th

6th.The flood also show the changes of climate near 120 years.