Groundwater resource protection is an emergency task for water resource conservation in Taiwan. Hydrogeological investigation, groundwater resource evaluation, groundwater recharge estimation, groundwater field experiment and monitoring are all important to protect the groundwater resources. CGS and the Water Resource Bureau began a 3 stage 17-year "Groundwater Monitoring Network Plan in Taiwan" in 1992. The main goal is to establish basic data on groundwater hydrology and hydrogeology in each ground water region of Taiwan. Nevertheless, to increase the accuracy of high groundwater recharge area assessment and recharge rate estimation, more hydrogeological information such as an aquifer storage coefficient and long term monitoring data of groundwater level and quality are necessary. Besides the date requirement , more research work such as groundwater level analysis, groundwater recharge potential assessment and groundwater model simulation are also essential.

The "Hydrogeological investigation and groundwater resources assessment plan in Taiwan" began in 2009 and will end in 2012. The main work and the major results in 2009 include:

-Establishing a standard procedure for groundwater recharge potential assessment.

-Sketching out the high groundwater recharge area in the Choshuichi groundwater basin.

-Completion of more hydrogeological investigations, included water quality and analysis pumping test and resistivity image profiling.

-Primary completion of a groundwater model simulation in the Choshuichi groundwater basin.

-Maintaining and updating the core data management system and hydrogeological database.

The result of this project can provide a basis to define a groundwater protection area and set up a controlling regulation for preventing groundwater and soil contamination in the protection area, and facilitate sustainable groundwater management.