石质山区人工油松林对坡面产流入渗的影响实验研究

Experimental study for the influence of artificial Chinese pine forest on slope runoff and infiltration in lithoid mountainous areas

以位于白洋淀上游易县崇陵小流域的两个坡面径流小区取得的动态监测数据为依据，对地质地貌条件相似仅有植被覆盖类型不同的两个坡面的降雨、径流的差异进行了对比分析。结果表明：油松人工林小区的出流时间和壤中流量均明显大于荒坡灌草小区，松林小区土层蓄水量明显大于灌草小区，说明油松人工林改变了坡面土壤的性质，起到了涵养水源作用。但短历时大强度降雨没有起到消减洪峰的作用，甚至会增大洪水发生的概率。该研究对白洋淀和城市水源地生态保护以及水土保持生态环境建设具有重要意义。

According to the dynamic monitoring data from two slope runoff plots in Yi County Chongling catchment which locates in the upper reaches of Baiyangdian Lake, the differences of precipitation and runoff under different vegetation cover and geological features were analyzed. The results show that it takes much longer time for a Chinese pine plantation area to have runoff than for an irrigation bush district, and so does the amount of interflow. The soil water storage capacity in pine area is significantly greater than that in shrub and grass district, which means that artificial Chinese pine forest can change the character of slope soil and it takes a great effect for water conservation. However, short-duration high-intensity rainfall did not play a role in reducing the flood peak, which may even increase the probability of floods occurring. The study is of great significance for ecological protection and soil and water conservation ecological environment contribution in Baiyangdian Lake and water resource of the city.