晋西几种不同土地利用状况下糙率系数的研究  

Study on Roughness Coefficient Under the Conditions of Several Land Utilization in the West of Shanxi Province

作　　者：张洪江[1] 北原曜[2] 解明曙[1] 远藤泰造 

机构地区：[1]北京林业大学水土保持学院,100083 [2]日本国际协力事业团日本森林综合研究所 [3]日本国际协力事业团黄土高原治山培训项目驻中国北京林业大学专家组

出　　处：《北京林业大学学报》1994年第S4期86-92,共7页Journal of Beijing Forestry University

摘　　要：在野外小区径流实验基础上,通过经转换的曼宁公式,对不同坡地地表的糙率系数(n)进行了定量研究.结果表明:林地上的糙率系数(n)与林地地表残存的枯落物量、林下草量呈正相关关系;不同土地利用现状的地表糙率系数(n)按由低到高的顺序排列,依次为土质路面、农耕地、核桃果园、人工刺槐林地、灌木林地和人工油松林地.本文还探讨了糙率系数(n)与地表水分渗透量的关系,初步结果表明:糙率系数值较大的地表其水分渗透能力也较大.Based on the field surface shallow flow experiments,the roughness coefficient value(n)on different land have been quantitatively demonstrated by changed Manning For- mula in this paper.The result shows that the relationship of roughness coefficient value(n) to litter and grass amount appears to be an orthographic correlation on forest land,and the order of roughness coefficient value(n)from lower to higher on different condtion of land use is as follows:soil road,culturing land,walnut plantation,the land of artificial locust forest, the land of shrub forestry and the land of artificial Chinese pine forest.This paper also deals with the relationship between roughness coefficient value(n)and the infiltration of water,the preliminary result shows that the higher the roughness coefficient value is,the more the in- filtration of water will be.

关 键 词：糙率系数 渗透 枯落物 土地利用 

分 类 号：S714[农业科学—林学]