坡度因子对济南市坡面土壤侵蚀特征的影响

发布时间：2019-03-18 21:13

【摘要】：为了研究坡度因子对径流小区土壤侵蚀特征的影响,认识济南南部山区坡面侵蚀的过程,充分利用济南市水文局水土保持监测实验站径流小区2014、2015年的实测数据,系统分析了坡度因子对坡面产流、产沙量的影响。结果表明:随着坡度的增大,坡面产流、产沙量逐渐增大,在坡度为20~25°时达到最大值,之后小幅减小,且整体上呈现增大的趋势;在不同雨强条件下,最大30 min雨强I_(30)40 mm/h比I_(30)≥40 mm/h的产流量、产沙量小;随着坡面植被覆盖度的增加,土壤抗蚀性提高,坡面产流量、产沙量减小;通过土壤流失方程模拟不同坡度坡面的产沙量与径流小区实际测得数据总体上差距较小,说明该模型及其参数适用于济南南部山区。
[Abstract]:In order to study the effect of the slope factor on the soil erosion characteristics of the runoff plot, the process of the slope erosion in the southern mountain area of Jinan is recognized, the measured data of the runoff plots of the water and soil conservation monitoring experimental station of Jinan Hydrographic Bureau for 2014 and 2015 are fully utilized, and the slope factor is systematically analyzed to produce the slope runoff. The effect of sediment concentration. The results show that, with the increase of the slope, the runoff and sediment concentration of the slope are gradually increased, the maximum value is reached when the slope is 20-25 掳, and the trend of the increase is presented in the whole. Under different rain and strong conditions, the maximum 30-min rain-strong I _ (30)40 mm/ h is less than that of the I _ (30)-40 mm/ h, and the sediment concentration is small; With the increase of the vegetation coverage of the slope, the soil corrosion resistance is improved, the runoff and the sediment concentration of the slope surface are reduced, and the total difference between the sediment concentration of the slope surface and the actual measured data of the runoff cell is simulated by the soil loss equation, The model and its parameters are described in the southern mountainous area of Jinan.
【作者单位】：北京林业大学水土保持学院;济南大学资源与环境学院;济南市水文局;
【基金】：国家自然科学基金项目(31400619) 济南市水文局项目(w14081)
【分类号】：S157.1

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