Over the study period, the river runoff of six river basins decreased with marginal significance (0.05 < P < 0.10, which is a confidence level close to significance) from 1982 to 2015, except for the Fen river basin ( P = 0.65) ( Pritschet et al., 2016 ) ( Figure 3 and Supplementary Figure 2 ).
Impacts of Climatic and Vegetation Factors on River Runoff Across all six river basins, the river runoff showed different degrees of decrease (two river basins showed a significant trend, three basins showed a marginally significant trend, and one basin didn’t show a significant trend), while GPP_GS (except the Hailaer river basin) and GSL showed an increase and delay trend during 1982–2015, respectively ( Figures 3 , 6 ).
There is a clear trend of increasing ET that, we found, both humid and semi-humid basins experienced the whole basin from 1982 to 2015, and the degree of increase can be divided into three levels ( Figure 5 and Supplementary Figure 4B ).