Articles

Assessment of Changes in the Value of Ecosystem Services in the Koshi River Basin, Central High Himalayas Based on Land Cover Changes and the CA-Markov Model

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  • 1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
    2. University of the Chinese Academy of Sciences, Beijing 100049, China

Received date: 2016-06-24

  Online published: 2017-01-20

Supported by

National Natural Science Foundation of China (41371120); Australian Government-funded Koshi Basin Programme at the ICIMOD; International Partnership Program of Chinese Academy of Sciences (131C11KYSB20160061).

Abstract

Climate warming and economic developments have created pressures on the ecological systems that human populations rely on, and this process has contributed to the degradation of ecosystems and the loss of ecosystem services. In this study, Landsat satellite data were chosen as the data source and the Koshi River Basin (KB) in the central high Himalayas as the study area. Changes in land cover and changes in the value of ecosystem services between 1990 and 2010 were analyzed and the land cover pattern of the KB in 2030 and 2050 was modeled using the CA-Markov model. Changes in land cover and in the value of ecosystem services in the KB for the period 2010-2050 were then analyzed. The value of ecosystem services in the KB was found to decrease by 2.05×108 USD y-1 between 1990 and 2010. Among these results, the services value of forest, snow/glacier and barren area decreased, while that of cropland increased. From 1990 to 2050, forest showed the largest reduction in ecosystem services value, as much as 11.87×108 USD y-1, while cropland showed the greatest increase, by 3.05×108 USD y-1. Deforestation and reclamation in Nepal contributed to a reduction in the value of ecosystem services in the KB. Barren areas that were transformed into water bodies brought about an increase in ecosystem services value in the lower reaches of the Koshi River. In general, this process is likely to be related to increasing human activity in the KB.

Cite this article

ZHAO Zhilong, WU Xue, ZHANG Yili, GAO Jungang . Assessment of Changes in the Value of Ecosystem Services in the Koshi River Basin, Central High Himalayas Based on Land Cover Changes and the CA-Markov Model[J]. Journal of Resources and Ecology, 2017 , 8(1) : 67 -76 . DOI: 10.5814/j.issn.1674-764x.2017.01.009

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