In this paper the influence of the soil and water conservation on runoff quantity and its processes in typical small watersheds have been analyzed by using the parallel observation in two comparable watersheds in gully plateau region of Loess Plateau. The integral control of soil and water loss in the region can result in the decreases of flooding time, runoff modulus and runoff coefficient in the watershed. The yearly variation of the runoff modulus will be intensified due to the control of watershed.
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