浮球覆盖下水面能量平衡再建与蒸发模型研究
Reconstruction of Water Surface Energy Balance and Evaporation Model under Floating Ball Coverage
徐思远 1严新军 1王海涛 1侍克斌1
作者信息
- 1. 新疆农业大学水利与土木工程学院,乌鲁木齐 830052;新疆水利工程安全与水灾害防治重点实验室,乌鲁木齐 830052
- 折叠
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 distri-bution 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 sur-face evaporation.Our results indicate that,when compared to uncovered water surfaces,the overall net radiation ab-sorption 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 aerody-namic terms,our model for calculating surface evaporation under covered conditions demonstrates high precision.
关键词
浮球/节水材料/能量平衡/蒸发模型/水资源利用率Key words
floating ball/water-saving materials/energy balance/evaporation model/utilization efficiency of water resource引用本文复制引用
基金项目
国家自然科学基金项目(51968071)
新疆维吾尔自治区"水利工程"重点学科研究项目(SLXK2019-04)
出版年
2024
国家科技期刊平台
NSTL
万方数据