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Soil and water loss in the Chinese Loess Plateau has become crucial issues in the world.The serious soil erosion has threatened the regional securities of society, economy and eco-environment.The soil and water loss in the Loess Plateau is a complex phenomenon coupling with multiple influence factors of human and nature.In general, the evolvement of natural factors is uncontrollable, but the human activity impacts can be dominated.Thus it is very of significance to perform the influence analysis of human activities on regional soil and water loss.