Figure 5 Rate of snow melting in the Hanliu River Basin during spring
and winter snowfalls(a: Spring; b: Winter)
In the Hanliu River Basin, there are differences in the snowmelt process
between spring and winter. In spring (Fig. 5(a)), the rate of snow
ablation is slower. The proportion of snow cover in the watershed was
initially 18.67% due to snowfall, and then gradually decreased. From
day 13, the rate of snowpack decline became faster. By day 16, the
proportion of snow cover had decreased by a total of 6.75%. During the
winter season (Fig. 6(b)), snowfall initially brought the proportion of
snow-covered area in the watershed to 38.47%. However, it rapidly
declined and stabilized after day 5, with the proportion of snow cover
decreasing by 23.31% during this time period. The overall rate of
decline was -1.5% per day. Therefore, the rate of ablation of the
spring snowpack in the Han River Basin was lower than that of the winter
snowpack.