石羊河流域平原地下水位动态特征与监测网观测频率优化

在阐述石羊河流域平原地下水位动态特征的基础上，采用频谱分析方法对研究区的地下水水位进行周期分析，并开展了地下水动态监测网的观测频率优化。结果认为：昌宁盆地水位动态存在4个周期成分，民勤和武威盆地水位动态存在2个周期成分，水位动态主要以年动态和月动态为主，动态类型主要有入渗径流开采型、开采型和补给开采型3种。昌宁盆地的水位监测频率每月可为2次，民勤和武威盆地的每月可为3次。

Dynamic of Groundwater Level and Observation-Frequency Optimization of Monitoring Network in the Plain of Shiyanghe River Basin

Based on expatiating the dynamic characters of groundwater level,we analyzed the period of groundwater level variation by the spectrum analysis method,also made the optimization on observation frequency of groundwater monitoring network in the plain of Shiyanghe River Basin.The results show that there are four periodic components in Changning Basin and two periodic components in each of Minqin and Wuwei Basin;the annual and the monthly dynamic regimes occur dominantly;and there are three kinds of groundwater level dynamic types mainly named !infiltration-flow-pumping",!pumping" and !recharge-pumping".The observation frequency can be considered two times a month in Changning Basin and three times a month in Minqin and Wuwei Basin.