摘要
为科学探索地下水位变化规律,研究地下水位对降水变化的响应机理,通过计算2001—2013年期间1~48个月时间尺度的标准化降水指数(SPI)与标准化地下水指数(SGI),统计分析SPI与SGI变化规律和相关关系,研究了地下水位埋深对降水变化的时空响应规律,进而寻求地下水位对降水最佳响应时间。结果表明:2001—2013年期间SPI呈波动变化,干旱期和湿润期持续时间随着计算SPI时间尺度的增加而延长,间隔变化频率随计算时间尺度增加而降低;地下水位对降水最佳响应时间出现的时间尺度为36~48个月。因此可见,SGI是研究地下水动态及其对降水变化响应较为有效的工具。
To scientifically explore the law of groundwater level change,the response mechanism of groundwater level to precipitation changes was studied.Through calculating the standardized precipitation index(SPI)and standardized groundwater index(SGI)from 1 to 48 months of the period from 2001 to 2013,the change law and correlation of SPI and SGI were statistically analyzed.Meanwhile,the time-space response law of groundwater level burial depth to precipitation change was studied,and the optimal response time of groundwater level to precipitation was identified.The results show that the SPI fluctuates during the period from 2001 to 2013.The duration of the dry period and humid period are extended with the increase of the SPI time scale.The interval change frequency decreases with the increase of the calculation time scale.The time scale of the optimal response time of the groundwater level to precipitation is 36~48 months.In summary,SGI is a tool to study groundwater dynamics and its response to precipitation changes.
作者
崔英杰
魏永富
徐晓民
廖梓龙
刘俊秋
CUI Ying-jie;WEI Yong-fu;XU Xiao-min;LIAO Zi-long;LIU Jun-qiu(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China;Institute of Water Resources for Pastoral Area of the Ministry of Water Resources of China, Hohhot 010020,China;College of Water Conservancy Engineering, Tianjin Agricultural University,Tianjin 300384, China)
出处
《科学技术与工程》
北大核心
2020年第16期6336-6342,共7页
Science Technology and Engineering
基金
国家水体污染控制与治理科技重大专项(2018ZX07110001)
中国水利水电科学研究院基本科研业务费专项(MK2019J06,MK2017J01)
国家自然科学基金(41807215,51609153)。
关键词
标准化降水指数
标准化地下水指数
地下水位
降水量
多时间尺度
standardized precipitation index
standardized groundwater index
groundwater level
precipitation
multiple time scale
