干旱区生态环境知识资源中心(Arid): Evaporation loss and energy balance of agricultural reservoirs covered with counterweighted spheres in arid region

Arid

DOI	10.1016/j.agwat.2020.106227
	Evaporation loss and energy balance of agricultural reservoirs covered with counterweighted spheres in arid region
	Han, Ke-Wu; Shi, Ke-Bin; Yan, Xin-Jun
通讯作者	Shi, KB
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2020
卷号	238
英文摘要	This study aims at evaluating the impact of counterweighted spheres on evaporation loss in agricultural reservoirs. To this end, water temperatures were measured in two evaporators-one covered with spheres and the other uncovered. Results reveal that during the irrigation period, the average evaporation reduction rate under the coverage of counterweighted spheres equaled 70.6%, average growth rate of the evaporation driving force equaled 19.2%, and average rate of mass-transfer coefficient reduction equaled 75.3%. Between April and August, the observed difference in water-surface temperature between the covered and uncovered groups was significant compared to that during other months. Likewise, for both groups, the water temperature was observed to increase between March and July and reduce between August and October. For the covered group, significant stratification of water temperature was observed between March to July, and the observed difference between the surface temperature (T-0w) and that recorded by the lowest sensor (T-7w) was the largest (1.9 degrees C) in July. Between August and October, the said water-temperature stratification was observed to gradually disappear with the difference between T-0w and T-7w being the smallest (0.2 degrees C) in October. For the uncovered group, the observed water-temperature stratification was not significant during the entire irrigation period. As observed, 33.6% of the net radiation of the covered group was used for evaporation consumption (latent heat flux), whereas the remaining 66.4% was transmitted to the atmosphere via heat transfer. Findings of this study reveal that sphere coverage serves to reduce evaporation and increase the amount of water required for irrigation. Although economic benefits of this technology were not observed to be significant, the amount of water saved can be used for supplying to irrigated areas. The proposed technology is economically feasible in terms of the net profit from crops produced per m(3) of water.
英文关键词	Agricultural reservoir Arid region Counterweight sphere Evaporation reduction rate Microclimate Energy balance
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000536054500010
WOS关键词	WATER ; SUPPRESSION ; MONOLAYERS ; REDUCTION
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/2XILL650/324560
作者单位	[Han, Ke-Wu; Shi, Ke-Bin; Yan, Xin-Jun] Xinjiang Agr Univ, Coll Hydraul & Civil Engn, 311 Nongda East Rd, Urumqi 830052, Peoples R China
推荐引用方式 GB/T 7714	Han, Ke-Wu,Shi, Ke-Bin,Yan, Xin-Jun. Evaporation loss and energy balance of agricultural reservoirs covered with counterweighted spheres in arid region[J],2020,238.
APA	Han, Ke-Wu,Shi, Ke-Bin,&Yan, Xin-Jun.(2020).Evaporation loss and energy balance of agricultural reservoirs covered with counterweighted spheres in arid region.AGRICULTURAL WATER MANAGEMENT,238.
MLA	Han, Ke-Wu,et al."Evaporation loss and energy balance of agricultural reservoirs covered with counterweighted spheres in arid region".AGRICULTURAL WATER MANAGEMENT 238(2020).