论文部分内容阅读
通过裸露地小区和荒草地小区7Be示踪对比研究,发现坡面植被覆盖对利用7Be示踪估算坡面土壤侵蚀速率有较大影响。在Walling等提出的7Be示踪估算裸露坡面土壤侵蚀速率模型中引入植被因子,估算有植被覆盖坡面的土壤侵蚀速率,结果显示修正后模型计算值与小区实测值比较接近,说明增加植被因子后的模型能够很好估算有植被覆盖坡面的土壤侵蚀速率,有关结果可为深入研究植被覆盖与土壤侵蚀之间的响应关系提供有效手段。
By contrasting the 7Be tracing of exposed and abandoned grassland plots, it is found that the slope vegetation cover has a significant impact on the slope erosion estimation by 7Be tracing. Vegetation factor was introduced into the model of soil erosion rate estimated by 7Be tracing proposed by Walling et al. To estimate the rate of soil erosion on the vegetation-covered slope. The results show that the calculated values of the corrected model are close to the measured values of the plot, indicating that increasing the vegetation factor The latter model can well estimate the rate of soil erosion on vegetation-covered slopes, and the results can provide an effective means to further study the relationship between vegetation coverage and soil erosion.