水土保持研究2025，Vol.32Issue(3)：170-179,10.DOI:10.13869/j.cnki.rswc.2025.03.041
降雨类型对滇中桉树人工林降雨分配的影响
Effects of rainfall types on rainfall distribution in Eucalyptus plantations in central Yunnan Plateau
摘要
Abstract
[Objective]This study aims to investigate the characteristics of external rainfall,explore different rainfall types,and clarify their impacts on canopy rainfall distribution in ecological public welfare Eucalyptus plantations.The findings provide scientific evidence for forest eco-hydrology research and the scientific evaluation of the ecological and eco-hydrological effects of Eucalyptus plantations.[Methods]Through three years of continuous observation,this study analyzed the external rainfall,throughfall,and stemflow in two Eucalyptus plantations of different ages,located 6 km apart.The results revealed that rainfall type significantly affected the rainfall distribution.[Results](1)During the study period,the total rainfall and distribution were similar in both plantations,regardless of age.Throughfall accounted for the largest proportion(56%～58%),followed by canopy interception(41%～44%),and the stemflow,which was the smallest(0.4%～0.8%).The external rainfall amount,rainfall duration,and the maximum 30-minute rainfall intensity(I30)showed the strongest correlation with rainfall distribution for individual rainfall events,with an average correlation coefficient exceeding 0.68.(2)Using clustering methods,external rainfall was categorized into four types:Type Ⅰ(moderate rain),Type Ⅱ(heavy rain),Type Ⅲ(storm),and Type Ⅳ(light rain).No significant difference in external rainfall types was observed between the two forest ages(except for type Ⅳ).(3)Among the four rainfall types,storm had the lowest lag effect and canopy interception rate.No significant difference was found between moderate rain and heavy rain(p>0.05).Light rain had the lowest stemflow rate/amount,throughfall rate/amount,and canopy interception amount,while no significant difference was observed between heavy rain and storms(p>0.05).Moderate rain was more likely to produce differences in rainfall distribution between the two plantation ages.[Conclusion]The rainfall distribution in the Eucalyptus plantations in central Yunnan varies across some rainfall types depending on rainfall distribution indicators selected.Plantation age only influences the rainfall distribution in moderate rain events.关键词
桉树人工林/降雨类型/降雨分配/滇中高原Key words
eucalyptus plantation/rainfall types/rainfall distribution/central Yunnan Plateau分类
林学引用本文复制引用
黄新会,陈奇伯,于福科..降雨类型对滇中桉树人工林降雨分配的影响[J].水土保持研究,2025,32(3):170-179,10.基金项目
国家自然科学基金项目(31460191) （31460191）
云南省科技计划项目农业联合专项(202401BD070001-114) （202401BD070001-114）
西南林业大学水土保持与荒漠化防治学云南省一流学科开放课题(SBK20240024) （SBK20240024）
