黄前库区森林地表径流水移动规律的研究

Study on Forest Surface Runoff Moving Law in Huangqian Reservoir Area

通过对黄前库区流域森林主要类型刺槐林和油松林土壤结构状况和渗透性能的比较,研究了不同森林类型地表径流水的移动规律。在自然降雨后,以1m×1m为基本单位推算其可能产生的地表径流量,根据实际径流量推算地表径流水在径流过程中下渗的数量。研究结果表明:刺槐林的森林土壤结构相对较好,地表径流水下渗的速度较快,而流速较慢,因而产生的地表径流量较少;而油松林,特别是阳坡油松林的土壤结构较差,地表径流水下渗的速度较慢,而流速较快,因而产生的地表径流量较大。

Through comparing the soil infiltration performance and structural characteristic of locust forest and Chinese pine forest in Huangqian reservoir area, the paper studies the moving law of surface runoff of different forest. After natural raining, surface runoff amount is calculated in basic unit of 1 m×1 m, and based on actual runoff amount the infiltration amount of surface runoff is also calculated. The result show that the soil structure of locust forest is better, and the infiltration speed of surface runoff is quicker, but the flowing speed is slower, therefore the total surface runoff is less; while for Chinese pine forest the soil structure of sunny slope is worse, and the infiltration speed of surface runoff is slower, but the flowing speed is quicker, therefore the total surface runoff is more.