摘要
喀斯特地区林冠截留对降水再分配和水源涵养起到重要的作用。以涟江流域马尾松为研究对象,以植被截留观测数据为基础,基于Horton模型建立涟江流域马尾松林冠截留模型。结果表明:观测期内,涟江流域降雨总量为520.67 mm,叶面积指数平均为0.39;马尾松林冠截留总量的模拟值为67.79 mm,与实测值误差16.55 mm,两者间的决定系数(R^2)为0.75,模型模拟效果较好;流域内马尾松林冠截留量占全年降水总量的17.04%,且流域林冠截留空间分布呈现由东北部向南部递减的规律,流域内黄壤与石灰土上的马尾松林冠截留量较大,而不同地貌对林冠截留量的影响较小。总体而言,构建的模型能达到较好的模拟效果,涟江流域马尾松林具有较强的林冠截留作用。
Canopy interception plays an important role in precipitation redistribution and water conservation.Based on the field observation data and the Horton Model,the canopy interception model for Masson pine forest in the Lianjiang River Basin was developed.The results showed that during the observation period,the total rainfall in Lianjiang River Basin was 520.67 mm and the average leaf area index was 0.39.The simulation results of the total interception volume of Masson pine was 67.79 mm with a bias of 16.55 mm compared with the measured data,and the determination coefficient(R2)was 0.75 which showed that the result was relatively good.In addition,the volume of canopy interception of Masson pine forest accounted for 17.04%of the total precipitation in the whole year.Furthermore,the distribution of canopy interception in the basin decreased from northeast to south.The canopy interception of Masson pine in yellow soil and lime soil in the watershed was large,but the impact of landforms on canopy interception was small.Overall,the constructed model can achieve satisfactory simulation results,and the Masson pine forest in Lianjiang River Basin has strong canopy interception capacity.
作者
周秋文
朱红
ZHOU Qiuwen;ZHU Hong(School of Geography and Environment Science,Guizhou Normal University,Guiyang 550001,China)
出处
《生态科学》
CSCD
2018年第2期43-49,共7页
Ecological Science
基金
国家自然科学基金(41761003)
贵州省科学技术基金(黔科合J字[2015]2118号)
贵州省本科教学工程建设项目:地理与环境生态大学生创新训练中心(2016DC3)
贵州师范大学博士科研启动金
