林草覆盖率

人工植被建设要以地带性植被分布规律为依据，从实际出发，确定合理的林草覆盖率目标。

So the artificial vegetation construction must be bused on the distribution law of belt vegetation and determine the reasonable coverage of forest ( grass ) practically .

林草覆盖率越高，植被对侵蚀的绝对控制能力越强，否则流域地形因素的影响亦不可忽视。

The larger grass and forest coverage , the stronger the absolute control capacity of vegetation on soil erosion , or influencing factors about topography may not be ignored .

以西北黄土高原区为实例，选取多年平均降雨量、林草覆盖率和强度以上侵蚀强度比例等5个主导指标，通过采用系统聚类方法，将西北黄土高原区分区5个二级区。

Northwest Loess Plateau as a instance , the average annual rainfall , vegetation cover and erosion intensity ratio were selected as the five leading indicators , through the use of system clustering method , the Northwest Loess Plateau is divided to five secondary regions .

当流域林草植被整体覆盖率达50%以上时，植被可稳定高效地抑制水土流失。

If grass and forest coverage in a watershed gets above 50 % , generally speaking , vegetation in it may check soil and water loss steadily and efficiently .