提出了一种数学模型来描述试验中沟宽的周期性形态变化。
A mathematical model was advanced to describe these changing patterns of rill width.
唯一能把她家用来过暑假的房子和大火分开的就是她和她父亲自己挖的一条不到一米宽的沟。
The only thing that separates her family's summer home from the flames, is a less than one-meter wide trench she and her father dug themselves.
把每条沟挖宽也无结果。于是，开挖六天后，他们转向两座有标识墓穴之间的一个新地点。
Widening each trench proved fruitless, so on the sixth day of digging, they moved to a new site, between two marked graves.
知道吗？大雨竟在一块长400英尺，宽12英尺的玉米地间，冲开了一个六英尺的沟，使玉米地与附近牧场的一片盐区相交。
On one of my corn strips, only 12 feet wide and about 400 feet long, there is, half way down one strip, a six inch gully created by a rain so heavy it melted a salt block in the pasture nearby.
模拟结果表明，细沟扩宽过程对坡度和坡面表土临界起动流速的变化十分敏感。
Simulation result also indicates that the rill width is affected both by slope gradient and critical detachment velocity of surface soil on the hill slope.
当细沟扩宽侵蚀在小区片蚀中占主要成分时，小区的片蚀总量常表现出与坡度和表层土使用方式的明显关系。
It is shown that the total amount of erosion is closely related to hill slope gradient and type of land use.
当细沟扩宽侵蚀在小区片蚀中占主要成分时，小区的片蚀总量常表现出与坡度和表层土使用方式的明显关系。
It is shown that the total amount of erosion is closely related to hill slope gradient and type of land use.
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