Arid Zone Research ›› 2018, Vol. 35 ›› Issue (3): 743-752.doi: 10.13866/j.azr.2018.03.30

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Temporal and Spatial Variation of Human Appropriation of Net Primary Productivity in the Middle Reaches of the Heihe River Basin

LI Feng, MENG Ji-jun   

  1. Key Laboratory of Earth Surface Processes of Ministry of Education,College of Urban and Environmental Sciences,Peking University,Beijing 100871,China
  • Received:2017-09-09 Revised:2018-01-18 Online:2018-05-15 Published:2025-11-17

Abstract: The human appropriation of net primary productivity (HANPP) is an important measure to evaluate the impact of land use on ecosystems.In this paper,the temporal and spatial distribution of HANPP in the middle reaches of the Heihe River Basin was estimated by Thornthwaite Memorial model,advanced CASA model calculation and statistical data,and then analyzed by the spatial correlation method.Temporally,in the case of grain yield increase year by year,the HANPP of the Heihe River Basin is fluctuated significantly,which is mainly driven by the fluctuation of precipitation.However,the HANPP ratio is at a relatively high level,ranging from 38% to 71%.Spatially,HANPP’s spatial pattern has been significantly altered.The high value of HANPP in the region has been transferred from the southern region of Minle County and Shandan County to away from Zhangye City and Shandan County.HANPP’s spatial pattern is related to the spatial pattern of actual net primary productivity.During the period from 2001 to 2013,HANPP had a positive spatial auto-correlation,which remained stable as a whole.The conclusion of this paper is of referential significance for the tradeoff of the economic development and ecological protection in the middle reaches of the Heihe River Basin as an ecological fragile area in the future.

Key words: HANPP, land use, spatial and temporal variation, sustainability, the middle reaches of the Heihe River Basin