A problem of groundwater resources

The term of groundwater resources was introduced to hydrogeology from economic geology similarly to the resources of ore bodies almost hundred years ago. It results years ago from the needs of physical planning, investment in new water intakes and water management. Discussion on the groundwater resources was started in the past after new method of their evaluation, e.g. analytical approaches, physical and then numerical modeling techniques implementation. The ecological aspects of water demands obliges to introduce new idea of quantities of groundwater resources estimation. This idea is also presented in the Water Framework Directive and in the water management planes in the water catchment areas