Applicability evaluation of WaSSI-C model in the upstream region of the mainstream of Tarim River
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DOI:10.7606/j.issn.1000-7601.2019.02.29
Key Words: WaSSI-C model  the coupling of water and carbon  runoff  evapotranspiration  gross ecosystem productivity  the upstream area of the mainstream of Tarim River
Author NameAffiliation
HOU Xiao-chen College of Computer and Information Engineering, Xinjiang Agricultural University, Urumchi, Xinjiang 830052, China 
SUN Wei Agricultural Information Institute of CAAS, Beijing 100081, China
College of Computer and Information Engineering, Xinjiang Agricultural University, Urumchi, Xinjiang 830052, China 
LI Jian-gui Institute of Forestry at Xinjiang Agricultural University, Urumchi, Xinjiang 830052, China 
LI Quan-sheng College of Computer and Information Engineering, Xinjiang Agricultural University, Urumchi, Xinjiang 830052, China 
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Abstract:
      Water-carbon coupling model can provide important implemental support for the integrated management of water and carbon resources in arid areas. The upstream region of the mainstream of Tarim River was selected as the research area. Based on the study of the theoretical methods and operating mechanism of the WaSSI-C model (Water Supply Stress Index-Carbon model) and according to the characteristics of natural geography and the environment in the study area, the calculation module for the glacier melting had been added to improve the applicability of the model. On this basis, the study period was divided into calibration period (2000-2009) and the validation period (2010-2015), and then we used the measured runoff data and MODIS evapotranspiration (ET) and gross ecosystem productivity (GEP) products to explore the applicability of WaSSI-C model in different locations of the study area. The R2 values of calibration and verification periods for the total runoff of the river basin were 0.72 and 0.68, respectively, and NS was 0.71 and 0.67, respectively; The R2 for ET were 0.60 and 0.64 for the two periods, respectively, NS was 0.60 and 0.56, respectively; The R2 for GEP were 0.68 and 0.61 and NS were 0.66 and 0.69 for the two periods, respectively. The two evaluation indexes of the simulation results were all maintained at 0.6 and above, except for the NS of verification period for ET. Therefore, the model can well simulate the dynamic changes of water and carbon resources in the upstream area of the mainstream of Tarim River.