Evaluation model and empirical study of carbon emission reduction effect from mining land reclamation

Mining land reclamation is an important way to improve the ecological environment of mining area and restore the service of damaged land,but little studies focused quantitatively on its effect to soil carbon pool,plant carbon pool.This paper developed an effect model of carbon emission reduction of land reclamation synthesizing the existing models of carbon resource,carbon sink of agricultural land,forest land,wet land and construction land,and evaluated the carbon emission reduction effect of land reclamation in Huaibei mining area.The results show that the carbon reduction effect of cultivated land(before damaged) to cultivated land(after reclamation) reclaimed improves,but waste landreclaimed to cultivated land or forest land is most effective,and carbon emission effect of original wet land which transformed to other type of land use turnsout inconspicuous or even becomes a carbon resource,and coal gauge used as filling material can effectively reduce potential emission of CO₂.Results of calculation show that Huaibei mining land reclamation succeeded on 1.05x10⁴ hm² damaged land and annually absorbed dose of CO₂ increased by 1.68 x10⁸ kg,so carbon sink effect was obvious.Therefore,mining land reclamation is an important way of carbon emission reducing.