基于无人机影像的天山雪岭云杉树冠降雪截留实验研究  

Experimental study on snow interception of Picea schrenkiana canopy based on UAV images

作　　者：阿卜杜外力·阿卜杜克热木 安外尔·阿卜杜热伊木 肖正清 刘素红[3] 比拉力·依明 玛丽亚木·玛木提 米尔扎提·依明 Abduwali·Abdukeram;Anwaier·Abudureyimu;XIAO Zhengqing;LIU Suhong;Bilali·Yiming;Maryam·Mamt;Mierzati·Yiming(College of Resources and Environmental Science and Key Laboratory of Oasis Ecology,Xinjiang University,Urumqi 830046;College of Mathematics and System Sciences,Xinjiang University,Urumqi 830046;Department of Geography,Beijing Normal University,Beijing 100875,China)

机构地区：[1]新疆大学资源与环境科学学院,新疆大学绿洲生态教育部重点实验室,乌鲁木齐830046 [2]新疆大学数学与系统科学学院,乌鲁木齐830046 [3]北京师范大学地理学部,北京100875

出　　处：《干旱区资源与环境》2022年第4期163-170,共8页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(41861053)资助。

摘　　要：森林冠层对降雪的截留是了解干旱、半干旱季节性积雪覆盖区域水文循环的重要过程之一,但在量化和估算树冠降雪截留量方面仍存在诸多困难。为探明冠层对降雪的分配规律,文中提出估算树冠降雪截留量的实验方法。于2020年11月至2021年3月在天山森林生态系统定位研究站内选取不同胸径(DBH)大小的9棵云杉。利用无人机正射影像提取冠层积雪覆盖面积,并对树冠降雪截留量进行野外实测,从而分别构建冠层积雪覆盖面积与树冠截留雪水质量和当量之间的关系。研究结果显示:冠层积雪覆盖面积与树冠截留雪水质量和当量之间存在高度正向关系,其决定系数(R^(2))分别达到0.89和0.94,回归方程分别为y=0.08698x^(2)+2.74266x-2.02411和y=0.00009x^(2)+0.1217x-0.0521。这表明冠层积雪覆盖面积能够很好地量化天山雪岭云杉树冠降雪截留量。研究结果可为遥感反演树冠截留雪水当量提供地面数据支撑和资料补充。Snow interception by forest canopy is one of the important processes in understanding the hydrological cycle in arid and semi-arid seasonal snow-covered regions.However,there are still many difficulties in quantifying and estimating the amount of snow interception by forest canopy.To clarify the influence of canopy on the distribution of snowfall,an experimental method for estimating canopy snow interception was proposed in this study.From November 2020 to March 2021,9 Picea schrenkiana trees with different diameter at breast height(DBH)sizes were selected at the Tianshan Forest Ecosystem Positioning Research Station.The canopy snow coverage areas were extracted from the unmanned aerial vehicle(UAV)orthophotos,and the field measurements on the canopy snow interception were carried out to separately construct the relationship between the canopy snow coverage areas and the canopy intercepted snow water weights and equivalents.The results showed that there were highly positive relationships between the canopy snow coverage areas and the canopy intercepted snow water weights and equivalents.Their R^(2)(coefficients of determination)reached 0.89 and 0.94,respectively,and the regression equations were y=0.08698 x^(2)+2.74266 x-2.02411 and y=0.00009 x^(2)+0.1217 x-0.0521.These results indicate that the canopy snow coverage area can well quantify the snow interception of Picea schrenkiana canopy.This study can provide ground data support and information supplement for remote sensing inversion of canopy intercepted snow water equivalent.

关 键 词：无人机 天山云杉 冠层积雪覆盖面积 树冠截留雪水当量 

分 类 号：P426.635[天文地球—大气科学及气象学] S715[农业科学—林学]