Estimation of Evaporation Losses from Reservoirs in the Upper Yellow River
Evaporation is one of the main ways for reservoirs to lose water.Accurate estimation of evaporation losses in reservoirs is essential for water resources management.Based on the Penman model and a dataset of global reservoir surface area,this study estimated the evaporation losses of 13 large and medium-sized reservoirs in the upper reaches of the Yellow River from 1985 to 2018.The results show that the water surface area of reservoirs increased significantly(p＜0.05)from 1985 to 2018,with a rate of 10.1 km2/year.Total evaporation losses also increase significantly(p＜0.05),with a rate of 7.0×10-3 km3/year,and the largest loss oc-curred in 2016,with a value of 0.403 km3.The increase of water surface area is the main reason for the increase of evaporation losses.Evaporation losses from reservoirs account for 0.27％-1.64％of the annual runoff in the upper reaches of the Yellow River(Lanzhou station),with a multi-year average of 1.05％.This study may provide helpful information for water resources management in the Yellow River Basin.
the upper Yellow Riverreservoirevaporation losswater surface evaporation
万方数据
维普
