| Analysis of impact of human activities on grassland environment based on ImPACT identity——A case study of pastoral area of Gannan |
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| DOI：10.7606/j.issn.1000-7601.2010.01.31 |
| Key Words: IPAT identity ImPACT identity impact on environment ImPACTS identity social resources |
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| Abstract: |
| Analysis of impact of human activities on environment has become a hot topic in the current time. On the basis of introducing the ImPACT identity combined with a case study of pastoral area in Gannan of Northwest China's Gansu Province during 1985～2020, the paper analyzes the effect of anthropogenic driving forces on environment of grassland including total population, affluence, livestock products intensity and consumption of grassland per unit
livestock product. It is found that a 1% change in economic increase results in a 15.79% change, especially the increase of population and GDP have positive impact, while the improvement of utilization efficiency of grassland and decrease of intensity of livestock can check the rapidly increasing environmental pressure. In the growth of affluence the coefficient of affluence elasticity of impact will increase. So in the empirical study, the overall findings do not support the environment Kuznets curve hypothesis, however, the impact of human activities on environment appears “U” curve wholly. The project of natural grassland recovery and construction was implemented during 2000～2004 in pastoral area in Gannan. At a certain period of time the project played an important role in alleviating the environmental pressure. So another kind of resources, namely social resources should be paid more attention to for the sustainable utilization of grassland. And after calculating the ImPACTS identity, it shows that if we consider social resources, a 1% change in economic increase would result in a 6.2% change
in environment pressure. That is to say, the social resources can alleviate the environmental pressure of grassland greatly, which decreases from 15.79% before considering social resources to 6.2% after putting social resources to practice. |
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