干旱区研究

Arid Zone Research ›› 2020, Vol. 37 ›› Issue (2): 341-348.doi: 10.13866/j.azr.2020.02.08

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Experimental analysis for estimating the canopy snow water equivalent intercepted by the snow cover area of the Tianshan spruce

WANG Yifan1,XIE Ling1,3,CHANG Shunli1,LIU Suhong1,2,Mariam Mamuti1,Mirzati Yimin1,Abdowli Abdukrmu1   

  1. (1. College of Resources and Environmental Sciences,Xinjiang University,Urumqi 830046,Xinjiang,China;2. Department of Geography,Beijing Normal University,Beijing 100875,China;3. College of Environment and Resources,Guangxi Normal University,Guilin 541004,Guangxi,China)
  • Received:2019-06-10 Revised:2019-09-11 Online:2020-03-26 Published:2020-04-21

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Abstract: The snow water equivalent is an important indicator that can directly reflect the amount of snow waterresources.An accurate and comprehensive acquisition of snow water equivalent data intercepted by the Tianshan spruce canopy is of considerable significance to improve the calculation accuracy of the Tianshan water resources.In this study,experiments were conducted to investigate the snow interception of spruce using simulated snow and the Tianshan spruce saplings.The snow cover area of the spruce was obtained using a camera,and the mass of the spruce canopy interception water was measured using a highprecision balance.Further,the relation between the snow cover area and the snow water equivalent was established.The experimental results show that the fitting curves between the snow water equivalent of the spruce canopy interception water and the spruce snow cover area obtained via vertical downward digital photography tend to be consistent for multiple spruce saplings over several simulated snowfall events; the fitted regression equation is y=21.235x2-1.457x(R2=0.992 5).Using repeated simulations of the spruce snowfall experiment,the snow cover and snow water equivalent of the spruce canopy interception models were obtained. Accordingly, a scientific method has been proposed to estimate the snow water equivalent of the spruce canopy interception based on the snow cover to provide a highprecision estimation model with respect to the intercepted snowfall and snow water equivalent of the Tianshan spruce canopy.

Key words: Tianshan spruce, sapling, simulated snowfall, snow cover area, digital photo, snow water equivalent, estimation model