Social and Ecological Impact of PES Program in Arid Region: The case from Zhang-ye in Northwest China

This paper research provides applications of the integrated assessment approach, appraise effects of the payments for environmental services (PES) program in Zhang-ye from social and ecological impact. The results find that, from 2002 to 2004, the score of social impact (voluntary action and satisfaction) in all districts is more than 0.5, but ecological impact in almost countries is below 0.5. It indicates that we gain a better effect on social impact in the implementation of the PES program, but there is not better ecological impact in the implementation of the PES program.