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汉语拼音：shuǐ tǔ liú shī

雨水冲蚀缺乏植被保护的地表，水分和表土同时流失，使土层逐渐变薄变瘠的现象。通常发生在丘陵和山区。由人为因素和自然因素造成，其中因经济活动不当导致天然植被破坏是主导因素。中国水土流失以黄土高原的丘陵沟壑区最为严重。

1. 平地或坡地表面的肥沃土壤被水冲走或被风刮走的现象。水土流失对农业危害性很大，能使肥沃土地变成荒地，淤塞河道，增加水旱灾害的严重程度。

   《花城》1981年第3期：“﹝我﹞也观察到黑甲虫怎样躲过啄木鸟的追袭，成片地吃掉树林，造成水土流失。”《光明日报》1982.12.19：“过去盲目砍树林，造‘大寨田’，围造湖田，造成严重的水土流失，破坏了自然界的生态平衡。”

• "This clearly shows that demand for gold and gold pricing might be another driver -- and a major driver -- of deforestation, " Pan said.

  Pan说：“很明显，对黄金的需求金价也许是另一个驱动者，是水土流失的主要驱动者。”

• This results can be used for monitoring and forecasting of soil and water loss as well as plan of soil and water conservation.

  研究结果可为流域水土流失监测和预报、水土保持措施合理配置等提供相应参考。

• Artificial soil and water loss is the main aspect whereas the natural soil loss is only the secondary position in urban soil and water loss.

  自然流失是城市水土流失的次要方面，城市建设产生的人为水土流失是城市水土流失的主体。

• Beijing soil erosion monitoring method can be used for reference in evaluating and monitoring on soil and water loss on regional scale.

  北京市土壤侵蚀监测方法的研究可为区域水土流失定量评价和动态监测提供借鉴作用。

• It encouraged landowners to plant belts of trees to slow the force of the wind and stop erosion.

  它鼓励土地拥有者建造林带以降低风力和控制水土流失。

• Terraces can effectively prevent soil erosion, which has been proven by thousands of years of practice.

  梯田能有效地防止水土流失，这已为千百年的实践所证实。

• Taxus Media with extensive root system, can preserve water and soil resources, and improve ecosystem around the verge of Sichuan Basin.

  曼地亚根系发达，能够保持水土流失，建立四川盆地边缘丘区到山地的生态屏障；

• Sloping farmland is one of the major sources of soil erosion in Hubei Province, and also a important portion of minor watershed improvement.

  坡耕地是湖北省水土流失的主要策源地之一，坡耕地治理是小流域综合治理的重要组成部分。

• Since the founding of New China, many measures have been taken to stop soil erosion.

  新中国成立后采取了许多控制水土流失的措施。