当多年平均大雨日数小于20日时，土壤侵蚀程度基本上随大雨日数的增加而增加；
When the number of downfall days is less than 20 annually, soil erosion degree increases along with the increase of downfall days.
沟壑密度是反映地表破碎程度的重要因子，在土壤侵蚀、地貌演变等研究中有重要作用。
Ravine density, which is an important factor indicating the extent of the fragmentation of the Earth surface, plays a significant role in the research of soil erosion and landform evolution, etc.
全省存在不同程度的土壤侵蚀敏感性。
There are various degrees of the susceptibilities of soil erosion in Shandong Province.
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