Benefit evaluation of land reclamation in mining subsidence area with higher level of underground water

The benefit of land reclamation in mining subsidence area with higher level of underground water is an important basis for investment decisions.Based on Qidong Mine reclamation project,this study learns reclamation benefit evaluation literature,thus establishes appropriate indicators system for land reclamation in mining subsidence area with higher level of underground water.System Dynamics(SD Act),net cash flow,income approach,value of ecosystem services and other methods are used to estimate the value associated benefits.In this paper,Qidong Mine reclamation project as an example to evaluate the effectiveness of land reclamation,including economic,ecological and social benefits.It proves to be feasible to evaluate quantitatively the overall efficiency if appropriate evaluation methods are used.And it also has important practical significance and application value for promoting land reclamation work when the benefits of all stakeholders are clearly in the project of land reclamation.