摘要
通过研究降雨条件下森林土壤的入渗规律,入渗与降雨强度的关系以及影响入渗的因素,认为地表击实层降低了土壤渗透性,裸露地土壤渗透系数降低到4.84%;湿润锋面在不同的土壤层次里以不同的速度下移时,降雨稳渗率 fc 与降雨强度 i 近似地呈直线相关,并与森林土壤具有很大的渗透容量有关;并指出,森林土壤积水时间同降雨强度的关系与理论推算值之间有很大差别。文中对有关过程做了数学描述。
Through the study on the infiltraion law of rainfall in forest soil,the relationship of infiltration with rainfall intensity,and the factors affecting the process,it is thought that the impacted layer of soil reduces the permiability,the infiltration coefficient of the naked soil is decreased to 4.84%.When the wet frontal faee moves down with different speed in different layer of soil the stable infiltration rate of rainfall has approa- ximatly direct relatives,which is connected to the great infiltration ca- pability.It also pointed out that the relation between gathering time of water and rainfall in forest is different from that of the theoretical value.The paper gives the mathematical description to the concerned process
出处
《水土保持学报》
CSCD
北大核心
1990年第2期79-84,共6页
Journal of Soil and Water Conservation
关键词
林地土壤
渗透系数
降雨强度
forest soil
infiltration coefficient
rainfall intensity
