滇中地区典型林分林地凋落物的水文功能  

Hydrological Functions of Forest Litters for Typical stand in the Central Area of Yunnan Province

作　　者：方斌 黄俊文 赵洋毅[3] 

机构地区：[1]云南秀川环境工程技术有限公司,云南昆明650021 [2]云南省水利水电勘测设计研究院,云南昆明650021 [3]西南林业大学环境科学与工程学院,云南昆明650224

出　　处：《防护林科技》2016年第6期12-15,共4页Protection Forest Science and Technology

摘　　要：通过对云南省松华坝流域典型林分林下凋落物水文功能进行的研究,结果表明:松华坝流域林地凋落物蓄积量为7.86~22.46t·hm^(-2),在浸泡24h条件下,凋落物最大持水率在123%~149%之间,有效拦蓄量在0.9~2.1mm之间。其中云南松+桉树混交林在凋落物储量、截流量、有效拦蓄量方面均大于纯林,桉树林大于云南松林;凋落物持水速率与其浸泡时间之间存在幂函数关系;凋落物层对于短历时、大暴雨的降水产生的径流、滞后径流有显著的影响。The hydrological function of forest litters for typical stand in Songhua Dam watershed was studied. Resultshows that the accumulation of different forest litter is about 7.8% 22.4% t hm 2 ,and the maximum water holdingcapacity ranges from 123 % to 149 %, and the modified interception amount is about 0.9 2.1 mm under the conditionof 24 h. The litter amount,reducing runoff interception yield of mixed forest of Pinus yunnanensisEucalyptusmaideni are more greater than that of pure forest;the upper indices of Eucalyptus forest are more than that of Pinusyunnanensis forest. Power function relationship is existed between the forest water holding rate ; soaking time;litter layer have significant effects on runoff and retardation short duration, rainfall runoff generated by rainstorm, runoff runoff produced by precipitation with the characteristics of short duration and rainstorm.

关 键 词：林分 凋落物 水文功能 

分 类 号：S718.52[农业科学—林学]