Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR028753 |
Evaporation suppression from small reservoirs using floating covers – Field study and Modelling | |
Bassem Mady; Peter Lehmann; Dani Or | |
2021-03-15 | |
发表期刊 | Water Resources Research
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出版年 | 2021 |
英文摘要 | Evaporative losses from small seasonal water reservoirs in semi‐arid regions may significantly diminish storage and water availability to rural communities. Motivated by finding effective and economically feasible measures for suppressing evaporation, we study the efficacy of self‐assembling floating covers in suppressing evaporation under field conditions and potential ecological ramifications of the covers. We conducted a multi‐season study with eight identical small reservoirs (13.5 m2 area and 1.5 m deep) using Ethylene‐Vinyl Acetate foam disks (200 mm in diameter, 15 mm thick) in white and black to cover six reservoirs (cover fraction of 91%), leaving two uncovered reservoirs for control. Physical attributes such as evaporative losses, radiative balance, temperature, and heat fluxes were measured and compared with modeling results. Evaporation suppression under field conditions ranged between 65 to 80% in the summer. Despite significant differences in energy partitioning, evaporation from white and black disks were relatively similar (∼20% for white and ∼30% evaporation for black disks compared to uncovered reservoir). Replacing black disks with water filled black Polyethylene balls improved suppression efficiency and diminished seasonal variations (∼80% suppression irrespective of season). We developed a physically‐based model to describe and extend the experimental findings by exploring effects of reservoir management regimes on evaporation and to optimize cover and reservoir characteristics for different climatic conditions. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/319877 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Bassem Mady,Peter Lehmann,Dani Or. Evaporation suppression from small reservoirs using floating covers – Field study and Modelling[J]. Water Resources Research,2021. |
APA | Bassem Mady,Peter Lehmann,&Dani Or.(2021).Evaporation suppression from small reservoirs using floating covers – Field study and Modelling.Water Resources Research. |
MLA | Bassem Mady,et al."Evaporation suppression from small reservoirs using floating covers – Field study and Modelling".Water Resources Research (2021). |
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