期刊
WATER RESOURCES
卷 45, 期 2, 页码 280-288出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S009780781802015X
关键词
water plans; evaporation reduction; Hexadecanol; arid area; Touggourt
资金
- laboratory of Exploitation and Valorisation of natural resources in arid zones
- National Centre for Engineering of Agriculture University of Southern Queensland,
- Scientific and Technical Research Center in Arid Regions (Touggourt Biophysical Station)
The extremely high rate of evaporation from water surfaces in arid and semi-arid areas greatly reduces optimal utilization of water reservoirs. In Algeria, which is at 80% an arid country, water resources are scarce and renewable due to low annual precipitation. Considering the importance of optimal utilization of renewable water resources, about 70 dams with capacity of 7.4 billion m(3) were constructed. One of the biggest problems of water in dams in Algeria is the huge amount of water loss through evaporation due to high evaporation rate. Therefore, applying techniques to reduce evaporation are greatly needed. One of the most recommended techniques for reducing evaporation is the application of a thin chemical film on the surface of the water. The present study aims to investigate the effect of this technique under arid conditions. Experiment was conducted for 20 weeks in Touggourt with three Colorado-type evaporation pans. Fatty alcohol with various doses were used in different pans. First pan was filled with water without adding fatty alcohol while in second pan, fatty alcohols was added with recommended concentration (0.3 kg/10(4) m(2)/day) and similarly in third pan fatty alcohol was added with concentration (0.5 kg/10(4) m(2)/day). The preliminary results of the study indicated that evaporation rate from surface water was reduced overall up to 16 and 22% in the second pan and the third one, respectively as compared to the non covered pan.
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