Table 2: The correlation coefficient of each meteorological element to runoff in the Dongjiang basin.

Basin units Basin scope Gauge stations Temperature Precipitation Evaporation Sunlight Humidity

D1 Upper Longchuan −0.10 0.80 −0.4 −0.35 0.27
D2 Midstream Heyuan −0.23 0.69 −0.28 −0.39 0.35
D The whole Basin Boluo −0.08 0.88 −0.54 −0.57 0.26