Normal and abnormal groundwater level data in subsurface fluid monitoring

The observational data are represented as one-dimensional time series with a sampling rate of one data point per minute, resulting in 1440 data points per day.观测数据以一维时间序列（one-dimensional time series）的形式进行表征，其采样率为每分钟1个数据点，单日共可产生1440个数据点。