摘要
采用树轮地貌学方法及土壤侵蚀速率时间变化分析方法,在河北省环首都山地4个代表性区域开展土壤侵蚀研究。结果显示,调查点的土壤侵蚀强度均在中度侵蚀以上,以极强度侵蚀和剧烈侵蚀为主。土壤侵蚀速率与坡度、地貌、岩性、植被状况等环境因子及人类活动密切相关。人类活动痕迹区、陡坡区、山麓区,岩性为碎屑岩、辉绿岩、灰岩、片麻岩或黄土状土的分布区,树木稀疏或林下植被稀疏区发生极强度侵蚀或剧烈侵蚀强度的可能性极高。对同一坡面调查点的分析显示,土壤侵蚀对坡度和人类活动最敏感,其它依次是植被和地貌部位。对不同树龄的调查点分析显示,近百年来环首都山地土壤侵蚀速率增长区域明显。为全面治理水土流失,应综合划定环首都山区土壤侵蚀敏感分区,开展分区分级治理。
Based on the dendrogeomorphological method and soil erosion rate temporal variation analyze method,the soil erosion rate of 4 representative distracts in Hebei mountains around Beijing were researched.The results showed that the erosion intention of research points were all above middle degree erosion. Most of the research points were very intensive erosion or violent erosion. The soil erosion rate was related to slope,geomorphology,lithology,vegetation conditions and human activity. These research points as follows were easy to occur very intensive erosion or violent erosion,such as human activity district,steep slope district,foothill district,clastic rock district,diabase district,limestone district,gneiss district or loess-like soil district and tree or undergrowth sparse areas. The results of the same slope surface showed that the soil erosion was the most sensitive to slope and human activity,then was vegetation conditions and geomorphology. The results of points with different tree ages showed that the soil erosion rates in the last hundred years had a considerable increase.For all-round management of water and soil erosion,the sensitiveness zone of soil erosion in Hebei mountains around Beijing should be comprehensively designated,and the zonal and hierarchic control should be carried out.
出处
《山东农业科学》
2017年第6期74-78,共5页
Shandong Agricultural Sciences
基金
河北省科学院科技攻关项目(16102)
关键词
环首都山地
土壤侵蚀
树轮地貌学方法
环境因子
Hebei mountains around Beijing
Soil erosion
Dendrogeomorphological method
Environmental factor
