要格外细心以确保水流不会穿越等高沟间的田埂。

Extra care must be taken to be sure that water does not cut through any of the ridges between contour furrows.

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等高沟克服了这个问题，因为这些沟垂直于主坡方向布置，沟道坡度约为0.5%。

Contour furrows overcome this problem because they are placed on a gradient of about 0.5 % across the main slope.

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等高绿篱措施能够明显减少浅沟坡面的土壤侵蚀，且保土效果比保水效果更加明显。

Contour hedgerows reduced the erosion on slope surface with ephemeral gullies effectively, and the effect of soil conservation was more obvious than the effect of water conservation.

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