Abstract: Emergencies or extreme climate events would pose potential risks to the water supply security in cities with only surface water source. In cities with abundant groundwater resource,groundwater strategic reserve can be built to cope with the problem of water shortage arising from emergencies. Nevertheless,systematic basis for evaluating the site selection of strategic reserve area is still in lack at present. In view of this,an evaluation index system of the suitability of site selection for strategic reserve of groundwater resource was established by using analytic hierarchy process. The index system involves groundwater supply capacity,impact of emergency use,socio-economic development,and environmental disaster impact. With the city of Wuhan,a typical city in the middle and lower reaches of the Yangtze River Basin,as a case study,the suitability of five target sites of groundwater strategic reserve was evaluated in consideration of the scale of water supply and the water-richness of aquifers,and the results showed strong suitability of target sites. On this basis,Feflow was employed to evaluate the emergency utilization scheme from the perspective of layout of mining wells and emergency time. The results manifest that with the increase of emergency time,the influence of pumping scheme on groundwater dynamic became more significant,but such influence attenuated with the increase of pumping well spacing. The research finding could provide reference for the site selection of groundwater strategic reserve in the Yangtze River Basin.

Key words: groundwater resource, strategic reserve, analytic hierarchy process, emergency use, indicator system