The primary factor of soil erosion is the erosion of Yanshan Period granite, the secondary factor is heavy rainfall, and the inducing factor is human activity.

• 水土流失产生的主导因素是燕山期花岗岩分布的丘陵区岩体结构遭到破坏；从属因素是持续强烈的降雨，从而加剧了水土流失；激发因素是人类工程活动对地质环境的破坏。