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The quantitative evaluation of glacier service value is crucial to solve the contradiction between eco-environmental protection and socio-economic development in the alpine area, and to establish a reasonable ecosystem compensation mechanism. Based on glacier outlines in 2000, 2010 and 2018, glacier service value and its changes in the Sanjiangyuan Nature Reserve of China (SNRC) were determined by constructing an assessment system that integrates the glacier volume equation, the unit area service price, and the inflation rate. The total value of glacier service was 42.15 billion CNY in the SNRC in 2018, which is about half of this regional gross domestic product (GDP). Among the various service functions, the descending order of value was climate regulation (23.59 billion CNY, 55.96%), run-off regulation (9.73 billion CNY, 23.08%), hydro-electric power generation (6.48 billion CNY, 15.38%), fresh water supply (2.22 billion CNY, 5.26%) and other service functions (0.13 billion CNY, 0.32%). The value of glacier service in each basins and municipal areas relied on glacier area. Due to the glacier recession, the service value of glaciers in the SNRC decreased by 5.01 billion CNY (−10.63%) in 2000–2018, with a spatial characteristic of the increase in the east and decrease in the middle and west. Except for climate regulation, all other values of glacier service were increasing. Especially for aesthetics and recreation, and scientific research and environmental education of glaciers, their values showed a rapid growth trend with social development.
Sun et al. (Thu,) studied this question.
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