水土保持学报2018，Vol.32Issue(2)：364-371,8.DOI:10.13870/j.cnki.stbcxb.2018.02.053
基于修正的Gash模型模拟中亚热带常绿阔叶林降雨截留过程
Simulation of Canopy Rainfall Interception of the Evergreen Broad-leaved Forest in Mid Subtropical Zone Using the Modified Gash Model
摘要
Abstract
Evergreen broad-leaved forest is well-preserved,and is playing an irreplaceable role in water conservation and ecological regulation in forest areas in Mid subtropical zone.In order to investigate the canopy interception and allocation and evaluate forest hydrological function and benefit of the evergreen broad-leaved forest in mid subtropical area quantitatively,positioning experiments were implemented during two rainy seasons of from 2016 to 2017 in Mopan Mountain national nature reserve.The amount of throughfall,stemflow and precipitation were measured and interception loss was subsequently calculated.Based on the observations of 26 rainfall events,canopy interception process of evergreen broad-leaved forest was simulated using the modified Gash model.The results showed that most of the observed rainfall had the low intensity,low duration and moderate rain.The amount of rainfall,throughfall,trunk flow and canopy interception were 994.07 mm,562.90 mm,16.90 mm and 406.40 mm,respectively,during the study period.According to the modified Gash model,the simulated amounts of throughfall,stemflow and canopy interception were 548.63 mm,21.75 mm,403.28 mm,respectively,and their relative error were 2.60％,22.29％ and 3.34％ respectively compared to the measured.The results of sensitivity analysis showed that the sequence of simulated results of canopy interception from large to small was c,(R),S,(E),St,Pt.关键词
修正的Gash模型/常绿阔叶林/降雨截留/敏感性分析/中亚热带Key words
Gash model/evergreen broad-leaved forest/canopy interception/sensitivity analysis/mid subtropical zone分类
农业科技引用本文复制引用
曹光秀,赵洋毅,段旭,薛杨..基于修正的Gash模型模拟中亚热带常绿阔叶林降雨截留过程[J].水土保持学报,2018,32(2):364-371,8.基金项目
国家自然科学基金项目(31760149,31560233) （31760149,31560233）
国家林业局林业科技创新平台运行项目(2017-LYPT-DW-158,2016-LYPT-DW-169) （2017-LYPT-DW-158,2016-LYPT-DW-169）
云南省高校优势特色重点学科(生态学)建设项目(05000511311) （生态学）
