sustainability Article Payment Criteria and Mode for Watershed Ecosystem Services: A Case Study of the Heihe River Basin, Northwest China 1,2, 3, 4, 5,6 1 Xiaoyu Song y, Yuqing Liu y, Fanglei Zhong * , Xiaohong Deng , Yuan Qi , Jinlong Zhang 1, Rong Zhang 4 and Yongnian Zhang 4 1 Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
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[email protected] (J.Z.) 2 Field Research Base of Land Use in Northwest China, Ministry of Natural Resources, Lanzhou 730000, China 3 School of Urban and Planning, Yancheng Teachers University, Yancheng 224007, China;
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[email protected] (Y.Z.) 5 Institute of County Economic Development, Lanzhou University, Lanzhou 730000, China;
[email protected] 6 Institute of Rural Revitalization Strategy, Lanzhou University, Lanzhou 730000, China * Correspondence: zfl@lzu.edu.cn These authors contributed equally to this work and share first authorship. y Received: 8 April 2020; Accepted: 29 July 2020; Published: 31 July 2020 Abstract: Quantitative evaluation of the relationship between payment criteria and the amount of additional ecosystem services can improve the cost-effectiveness of payment for ecosystem services (PES) projects. This paper simulated additional water conservation (AWC) using the Soil and Water Assessment Tool (SWAT) model, examined appropriate payment criteria, and matched different payment modes with local herders’ preferences in Northwest China. The results showed that if all the low-coverage grass areas were to be closed through PES projects, the actual payment criteria, 37 yuan/ha, would need to be increased eight times, which would be 302 yuan/ha.