Search

Taking Jiuli mine area of Xuzhou as an example, a NPP evaluation was taken by CASA model. The results indicate that: it is available to scale mining eco-environment by NPP; during the period of 1987--2008, the NPP decreased from 18.019 to 9. 261 gC/( m2 · month), and the average variation of NNP increased from 0. 293 to 3. 389 gC/(m² · month). With the increase of mining activity, ecological loss increased gradually; the variation of NPP in the ecological damage area was from 2. 752 to 4. 752 gC/( m² · month). The variation of NPP in the ecological influencing area was from 0. 152 to 0. 352 gC/( m² · month). The average variation in the ecological damage area was greater than the ecological influencing area; there is a significantly positive con-elation between NPP reduction and mining capacity. NPP begins to decrease in the construction period of mine, and NPP reduces markedly in the high stable production period of mining, and subsequently NPP has an increasing trend during the decay period of mining, and the mining eco-environment developes to the bright side. [ABSTRACT FROM AUTHOR]