摘要
潜在蒸散量是评价区域水资源配置的重要参数,探究其时空变化特征及影响因素一直是国内外研究的重点。基于气象数据与非气象数据,利用趋势分析、地理单元重分类、地理探测器等方法,本研究对1990年~2015年三江源地区潜在蒸散量的时间变化趋势和空间分布进行分析,探究气象因子和非气象因子及其交互作用对三江源地区潜在蒸散量的影响程度,主要结果如下:(1)1990年~2015年三江源地区潜在蒸散量年平均值整体以0.57 mm/a速率增加,夏季潜在蒸散量平均为1012.051 mm,对年潜在蒸散量贡献最大;(2)三江源年均潜在蒸散量的空间分布规律总体上表现为南高北低、东高西低;(3)气象要素是影响潜在蒸散量变化的主导要素,非气象要素中高程对潜在蒸散量的变化解释力最大;(4)1990年~2015年,各地理因子对三江源地区潜在蒸散量变化存在交互作用,主要交互作用为非线性增强和双因子增强,其中平均风速∩高程是第一主导交互因子,其值为0.705。本研究结果可为三江源水资源配置提供重要参考依据。
Potential evapotranspiration is an important parameter to evaluate the allocation of regional water resources.Exploring its spatiotemporal characteristics and influencing factors has been the focus of research.Based on meteorological data and non-meteorological data,the temporal variation trend and spatial distribution of potential evapotranspiration in Sanjiangyuan area from 1990 to 2015 are analyzed by means of trend analysis,geographic unit reclassification and geographic detector,and the influence of meteorological factors and non-meteorological factors and their interactions on the potential evapotranspiration in Sanjiangyuan area is explored.The main results are as follows:(1)The annual average of the potential evapotranspiration in Sanjiangyuan area increased at a rate of 0.57 mm/a from 1990 to 2015,and the average summer potential evapotranspiration in Sanjiangyuan area increased at an average rate of 1012.051mm,making the greatest contribution to the annual potential evapotranspiration;(2)The spatial distribution law of the potential evapotranspiration in Sanjiangyuan area from 1990 to 2015 is generally low in the south,high in the north and high in the east,and low in the west;(3)The meteorological factors are the dominant factors affecting the potential evapotranspiration in Sanjiangyuan area,and the range of non-meteorological factors has the greatest explanatory power to the potential evapotranspiration in Sanjiangyuan area;and(4)From 1990 to 2015,each geographical factor has an interactive effect on the potential evapotranspiration in Sanjiangyuan area,which is mainly an enhancement factor and both.The results of this study can provide important reference for water resources allocation of the Three Rivers.
作者
黄媛
刘芷含
雷珂
毛旭锋
Huang Yuan;Liu Zhihan;Lei Ke;Mao Xufeng(College of Geographical Sciences,Qinghai Normal University,Xining 810008,China)
出处
《青海科技》
2022年第5期34-44,共11页
Qinghai Science and Technology
基金
国家自然基金项目(52070108)。
关键词
潜在蒸散量
三江源
时空变化
地理探测器
Potential evapotranspiration
Three rivers source
Time and space change
Geographic detector
作者简介
黄媛(2000-),女,本科,主要从事地理信息科学研究。E-mail:hyuan20002022@163.com。;通讯作者:毛旭锋(1981-),男,教授,主要从事湿地生态过程、湿地保护与恢复研究。E-mail:maoxufeng@yeah.net。
