Abstract: In order to solve the calculation and analysis problems of the waterlog quantity caused by coal mining subsidence in eastern plain,GIS hydrological analysis is innovatively applied to the study of subsidence waterlog to construct the calculation model of water in mining subsidence area.Taking Guangfu River Basin as an example,the catchment area affected by coal mining subsidence of the basin in 2009 and 2015 are respectively calculated as 276.0 km² and 1 091.4 km²,the affected atmospheric precipitation confluence are respectively 58 000 000 m³ and 229 000 000 m³,and the actual retention are respectively 2 867 000 m³ and 5 562 000 m3.Subsidence water has a large degree of damage to the original natural watershed confluence and water circulation,and the subsidence waterlog calculation model can provide technical support and theoretical guidance for waterlog management and protection of water resources in mining subsidence area.

Key words: Mining subsidence, Subsidence waterlog calculation model, Affected catchment area, Waterlog bearing capacity