The depth of soil that rainfall(about 100mm) affected was about 60cm on the sandy soil and the lowland between sandy dunes. Therefore the soil moisture layer was mainly influenced by the rainfall distributed between 0cm and 60cm deep.

• 100mm左右的降雨量对沙地和丘间地的影响深度主要在60cm左右,因此0-60cm土层为土壤水分受降雨影响的活跃层;