PE浮球覆盖下水面蒸发抑制率及水质影响研究

Evaporation Inhibition Rate and Water Quality of Water Covered by PE Float

针对我国北方干旱地区湖面和水库无效蒸发量过大问题,采用物理覆盖法,通过使用不同直径、不同颜色PE浮球对水面进行覆盖,研究其蒸发抑制率和对水质产生的影响。结果表明,PE浮球对水面蒸发抑制效果较好,不同直径浮球间蒸发抑制率有所差异,直径为100 mm、80 mm、60 mm的浮球蒸发抑制率分别为70.79%、75.91%、75.35%。浮球覆盖也可以一定程度降低水体中盐分和TDS的上升速率,试验中PE球覆盖蒸发池的盐度、TDS、电导率较无覆盖蒸发池的上升速率分别降低了18.5%、17.5%、18.4%。PE浮球物理覆盖法具有较好的抑制蒸发和降低水体部分溶质浓度上升速率的效果。

Aiming at the problem of excessive ineffective evaporation of lakes and reservoirs in arid areas of north China,this experiment adopts physical mulch method.PE floats with different diameters and colors are used to cover the water surface to study the evaporation inhibition rate and the influence on water quality.The results show that PE float has a good effect on the surface evaporation inhibition,and the evaporation inhibition rate varies with different diameters.The evaporation inhibition rate of 100mm,80mm and 60mm floats is 70.79%,75.91%and 75.35%,respectively.In the test,the salinity,TDS and conductivity of the evaporation pool covered by PE ball decreased by 18.5%,17.5%and 18.4%,respectively,compared with that of the evaporation pool without cover.PE float physical covering method has a good effect on inhibiting evaporation and reducing the rate of solute concentration rise in water.