干旱区生态环境知识资源中心(Arid): Effect of floating balls on evaporation inhibition, surface energy balance and biological water quality parameters at different coverage fractions

Arid

DOI	10.1016/j.agwat.2023.108460
	Effect of floating balls on evaporation inhibition, surface energy balance and biological water quality parameters at different coverage fractions
	Hao, Guochen; Han, Kewu; Shi, Kebin
通讯作者	Shi, KB
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2023
卷号	287
英文摘要	High evaporation in plain reservoirs in arid regions exacerbates water shortages. Investigations have established that floating elements assembled modular with maximum coverage on the water surface, such as floating balls, can effectively mitigate ineffective water evaporation. Nevertheless, the employment of floating balls to achieve maximum coverage of the water surface may pose a threat to aquatic life and the initial investment is substantial. Thus, this study employs floating balls for partial coverage of the water surface, intending to examine the impact of altering the coverage rate of the floating balls on the efficiency of evaporation inhibition, energy balance, and water quality. To achieve this goal, we established five sets of evaporators on the top of the reservoir dam, each with a surface area of 1.13 m(2) and a depth of 0.8 m. These evaporators were covered with varying percentages of black high-density polyethylene floating balls with a diameter of 0.1 m, including 0%, 18.74%, 37.49%, 56.23%, and 74.98% coverage. The results show that the evaporation inhibition rate is less than the coverage rate. The solar radiation flux is decoupled on the evaporation surface, and the change of coverage ratio affects the size, transfer direction, and relative proportion of each component of the energy balance. With the increase of coverage, more radiation flux is converted into sensible heat flux, which increases the Bowen ratio. The water surface covered by the floating balls has a particular effect on improving the water quality. With the increase in coverage rate, the concentration of chlorophyll, nutrient salt, and suspended solids decreased significantly, and the impact on dissolved oxygen in the water was less. Finally, the economic viability of varying coverage ratios of floating balls was also confirmed. Currently, there is a paucity of reservoir-scale studies, and the effect of floating balls on evaporation and energy balance in the flowing water of actual reservoirs needs further investigation.
英文关键词	Plains reservoirs Water temperature Evaporation barrier Salt control Water ecosystem
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001092371200001
WOS关键词	DISSOLVED-OXYGEN ; RESERVOIRS ; FLOW ; SUPPRESSION ; EFFICIENCY ; SALINITY
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395078
推荐引用方式 GB/T 7714	Hao, Guochen,Han, Kewu,Shi, Kebin. Effect of floating balls on evaporation inhibition, surface energy balance and biological water quality parameters at different coverage fractions[J],2023,287.
APA	Hao, Guochen,Han, Kewu,&Shi, Kebin.(2023).Effect of floating balls on evaporation inhibition, surface energy balance and biological water quality parameters at different coverage fractions.AGRICULTURAL WATER MANAGEMENT,287.
MLA	Hao, Guochen,et al."Effect of floating balls on evaporation inhibition, surface energy balance and biological water quality parameters at different coverage fractions".AGRICULTURAL WATER MANAGEMENT 287(2023).