近20年若尔盖高原陆地水储量变化分析  

Analysis of Changes in Terrestrial Water Storage in the Zoige Plateau in the Past 20 Years

作　　者：张篪 仙巍[1] 樊松林 杨增平 ZHANG Chi;XIAN Wei;FAN Songlin;YANG Zengping(College of Resources and Environment,Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]成都信息工程大学资源环境学院,四川成都610225

出　　处：《成都信息工程大学学报》2024年第4期470-476,共7页Journal of Chengdu University of Information Technology

基　　金：四川省自然科学基金资助项目(2022NSFSC0231)。

摘　　要：黄河上游若尔盖高原湿地区多年来存在湿地退化萎缩的趋势,维持若尔盖地区的陆地水储量对湿地区生态环境保护和经济发展有重要意义。为更好地分析近20年来的若尔盖高原地区陆地水储量时空分布和变化情况,运用GRACE重力卫星数据,进行降尺度处理后,结合统计方法,对若尔盖高原地区2003-2020年的陆地水储量时空分布及其与降水的关系进行讨论和分析。研究结果表明:研究时段内,若尔盖陆地水储量呈上升趋势,增长速率为1.37 cm/a,且有明显季节性变化特征;小波分析显示11 a为陆地水储量变化的第一主周期;空间分布上,水储量有从东部地区向西部地区逐渐降低的趋势。计算降水与水储量变化之间的相关性系数为年际尺度0.497和年内尺度0.402,两者为中等相关关系,降水是陆地水储量变化的主要驱动因子之一。There has been a trend of degradation and shrinkage in the wetland of the Zoige Plateau in recent years.Main-taining the terrestrial water storage in the Zoige Plateau is of great significance for ecological environmental protection and economic development in the wetland.To comprehensively analyze the spatiotemporal distribution and changes in terres-trial water storage in the Zoige Plateau region over the past 20 years,the GRACE gravity satellite data after scale decline combined with statistical methods are used to discuss and analyze the temporal and spatial distribution of terrestrial water storage and its relationship with precipitation in the Zoige Plateau from 2003 to 2020.reveal an upward trend in land wa-ter reserves in Zoige during the study period,with a growth rate of 1.37 cm/a and significant seasonal variations.The wavelet analysis shows that the first major period of terrestrial water storage change in Zoige is 11 years.In terms of spa-tial distribution,water reserves have a trend of gradually decreasing from the eastern region to the western region.The correlation coefficient between precipitation and changes in water storage is calculated to be 0.497 on an interannual scale and 0.402 on an interannual scale,with a moderate correlation.Precipitation is one of the main factors for changes in terrestrial water storage.

关 键 词：GRACE 陆地水储量 若尔盖高原 

分 类 号：P426.614[天文地球—大气科学及气象学]