Check dam is the main measure for soil and water conservation, and its benefit in water and soil loss is remarkable, especially in the most seriously eroded first sub-region of hilly-gully Loess Plateau.

• 摘要淤地坝是水土保持治理的主要措施之一，特别是在水土流失最为严重的黄土丘陵沟壑区一副区，其效益更为突出。