The groundwater observationwell is the basic facility to grasp the groundwater regime, and to appraise and study the groundwater resources.
地下水观测井网是掌握地下水动态，评价与研究地下水资源的基础设施。
2
The groundwater observationwell-network for earthquake prediction in China is the largest precursory observation system except the seismograph array.
中国地震地下水动态观测网是我国仅次于测震网的第二大地震前兆观测系统。
3
By combining the theoretical analysis and test, the monitoring method of observationwell, by which the volume shrinkage deformation of the cavity can be derived, is provided and verified.