重庆缙云山不同植被类型对地表径流系数的影响  

Effect on Surface Runoff Coefficient of Different Vegetation Types in Jinyun Mountain of Chongqing

作　　者：张洪江[1] 孙艳红[1] 程云[1] 程金花[1] 

机构地区：[1]北京林业大学水土保持学院,北京100083

出　　处：《水土保持学报》2006年第6期11-13,45,共4页Journal of Soil and Water Conservation

基　　金：国家重点基础研究发展"973"计划"长江上游环境变化与产水产沙作用机理"(2003CB415202-3)资助。~~

摘　　要：为探索影响地表径流系数因素的主次关系,利用灰色理论对重庆缙云山不同植被类型的草本层盖度、枯落物厚度、灌木层盖度和郁闭度影响地表径流的因素进行了灰关联分析。结果表明:所选取的植被状况参数对地表径流系数影响的大小顺序是:草本层盖度(0.7720)>枯落物厚度(0.744 5)>灌木层盖度(0.666 1)>郁闭度(0.614 2);不同植被类型的植被状况对地表径流系数的影响,针阔混交林和常绿阔叶林的植被状况对地表径流系数的影响大,其灰关联度分别为0.634 6和0.618 5,而楠竹林对地表径流系数的影响最小,其灰关联度为0.500 0。灰色关联法分析结果进一步证实了针阔混交林和常绿阔叶林具有良好的水文生态功能。To probe into the primary and secondary relation of factors influencing runoff coefficient, based on the grey system theory, a grey correlation analysis on factors which is herb layer coverage,litter layer thickness,shrub layer coverage and canopy density surface runoff was made, using the data measured in different vegetation types of Jinyun mountain, Chongqing. The results indicate that the effects on surface runoff coefficient by the parameters of vegetation status is herb layer coverage （0. 772 0）〉 litter layer thickness （0. 744 5） 〉 shrub layer coverage （0. 666 1）〉 canopy density （0. 614 2）. The mixed wood and broadleaf forest has better effect on surface runoff coefficient in different vegetation types, the grey correlation degree is 0. 634 56,0. 618 5 in turn. The bamboo forest has the smallest effect on surface runoff coefficient, the grey correlation degree is 0. 500 0. It is prove the mixed wood and broadlcaf forest has better hydrological and ecological function.

关 键 词：灰关联 关联度 植被状况 地表径流系数 

分 类 号：S157.1[农业科学—土壤学]