浮球覆盖下水面能量平衡再建与蒸发模型研究

徐思远; 严新军; 王海涛; 侍克斌

doi:10.11988/ckyyb.20221405

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长江科学院院报 ›› 2024, Vol. 41 ›› Issue (3) : 22-29. DOI: 10.11988/ckyyb.20221405

水资源

浮球覆盖下水面能量平衡再建与蒸发模型研究

徐思远^1,2, 严新军^1,2, 王海涛^1,2, 侍克斌^1,2

作者信息 +

Reconstruction of Water Surface Energy Balance and Evaporation Model under Floating Ball Coverage

XU Si-yuan^1,2, YAN Xin-jun^1,2, WANG Hai-tao^1,2, SHI Ke-bin^1,2

Author information +

文章历史 +

摘要

针对干旱区平原水库蒸发强烈导致水资源利用率低的问题,选用黑色高密度聚乙烯(HDPE)浮球作为干旱区平原水库节水材料。通过理论分析、建模与室外试验三者结合,对完整非冰冻期内浮球覆盖下水面蒸发、水体能量平衡组分变化分布的响应机理进行研究,并在此基础上建立相应的水面蒸发量计算模型。结果显示:相较于自由水面,73%的浮球覆盖率下的整体水面净辐射吸收率减小约12.6%,其月均蒸发所需潜热通量减少了61.8%,约为148.73 W/m²,水体的感热通量和蓄热通量也有较大的变化。通过对彭曼模型的能量项和空气动力项进行修正,建立的覆盖条件下的水面蒸发量计算模型具有较高的精度。

Abstract

To address the issue of low water resource utilization caused by intense evaporation in plain reservoirs in arid regions,we have chosen black high-density polyethylene floating balls as a means to combat evaporation and promote water conservation.This study examines the response mechanism of water surface evaporation and the distribution of water energy balance components under floating ball coverage throughout the non-freezing period using theoretical analysis,modeling,and outdoor experiments.On this basis,we developed a calculation model of water surface evaporation.Our results indicate that,when compared to uncovered water surfaces,the overall net radiation absorption rate decreases by approximately 12.6% under a 73% floating ball coverage.The average monthly latent heat flux required for evaporation decreases by 61.8% to approximately 148.73 W/m².The sensible heat flux and heat storage flux of water body also experience significant changes.By accounting for modifications in energy and aerodynamic terms,our model for calculating surface evaporation under covered conditions demonstrates high precision.

导出引用

徐思远, 严新军, 王海涛, 侍克斌. 浮球覆盖下水面能量平衡再建与蒸发模型研究[J]. 长江科学院院报. 2024, 41(3): 22-29 https://doi.org/10.11988/ckyyb.20221405

XU Si-yuan, YAN Xin-jun, WANG Hai-tao, SHI Ke-bin. Reconstruction of Water Surface Energy Balance and Evaporation Model under Floating Ball Coverage[J]. Journal of Changjiang River Scientific Research Institute. 2024, 41(3): 22-29 https://doi.org/10.11988/ckyyb.20221405

中图分类号： TV697

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