京津冀陆地水储量变化与区域降水相关性分析  

Correlation analysis of terrestrial water storage change and regional precipitation in Beijing-Tianjin-Hebei

作　　者：杨康[1,2] YANG Kang(College of Geodesy and Geomatics,Shandong University of Science and Technology,Qingdao Shandong 266590,China;Chinese Academy of Surveying and Mapping,Beijing 100036,China)

机构地区：[1]山东科技大学测绘与空间信息学院,山东青岛266590 [2]中国测绘科学研究院,北京100036

出　　处：《北京测绘》2022年第4期441-446,共6页Beijing Surveying and Mapping

基　　金：自然资源部海洋环境探测技术与应用重点实验室开放基金课题(MESTA-2020-A001)。

摘　　要：针对京津冀地区水资源灾害频发、水储量监测手段存在局限性的问题,本文利用该地区2015年1月至2017年6月的重力场恢复与气候实验(GRACE)月重力场模型数据反演陆地水储量变化信息,结合区域降水、全球陆地资料同化系统(GLDAS)模型数据,对研究区域内水储量变化时空特征进行相关性分析。结果表明:GRACE监测的陆地水储量变化滞后降水2个月达到强相关性,监测到2016年春旱灾害的发生,扣除季节项影响后,GRACE&GLDAS相关系数为0.88,研究区陆地水储量上升速率为0.118 mm/a。研究结果可为该区域水储量时空调配、旱涝灾害防治提供理论依据。In view of the frequent occurrence of water resources disasters and insufficient water storage monitoring methods in the Beijing-Tianjin-Hebei region,the GRACE monthly gravity field model data from January 2015 to June 2017 were introduced to invert the information of terrestrial water storage changes.Combined with regional Precipitation,GLDAS model data,the correlation analysis of the temporal and spatial characteristics of water storage changes was carried out in the study area.The results showed that the changes in land water reserves monitored by GRACE lagged behind precipitation for 2 months to reach a strong correlation.After monitoring the occurrence of spring drought disasters in 2016,after deducting seasonal effects,the GRACE&GLDAS correlation coefficient was 0.88,and the rate of increase of land water reserves in the study area was 0.118.mm/year.The research results can provide a theoretical basis for the distribution of air conditioning and the prevention and control of drought and flood disasters in the area of water storage.

关 键 词：重力场恢复与气候实验 陆地水储量变化 降水 全球陆地资料同化系统 相关性分析 

分 类 号：P258[天文地球—测绘科学与技术]