In order to research the impact of lessive soil erosion under the freeze-thaw condition in spring thaw period

freeze-thaw temperature

freeze-thaw cycles

initial water content

snowmelt water flow

thaw depth were selected to study the effects of these five factors on soil erosion by using indoor artificial simulated snowmelt experiment.The results showed that the primary factor was snowmelt water flow.The erosion was mainly happened in the first 15 freeze-thaw cycles in spring thaw period

even though the cycles increase after that

the erosion wasn′t increase at all.There was not a significant linear relationship between soil moisture and erosion

but the erosion of relatively small initial soil moisture was greater than the larger amount of initial soil moisture.During the process of scouring runoff

the size of snowmelt water and the existence of soil frozen layer

which both affect the relations between the thaw depth and erosion.When the snowmelt water flow was smaller

the less depth of soil was thawed

the more amount of soil will be eroded

that appear a negative correlation between the two;however

when the snowmelt water flow was greater

that appeared a positive correlation.