NDLI: Effects of natural covers on soil evaporation of the shelterbelt along the Tarim Desert Highway

Content Provider	Springer Nature Link
Author	Zhou, HongWei Li, ShengYu Sun, ShuGuo Xu, XinWen Lei, JiaQiang Liu, Shang Du, WenYi Yan, Zeng Wang, YongChang
Copyright Year	2008
Abstract	The control of soil evaporation is one of important approaches to save water. The artificially simulated evaporation experiments have been conducted in the hinterland of the Taklimakan Desert to reveal the effects of the natural covers on the soil evaporation of the Tarim Desert Highway shelterbelt as well as provide some insights in the efficient utilization of water resources and optimization of irrigation systems. The results showed that (1) All the covers, including the sand deposit, the salt crust, the litter, the sand-litter mixed layer and so on, can significantly inhibit the soil water evaporation. Specifically, the daily evaporation, the total evaporation, and the evaporation rate in covered sands were much smaller than that of sands without cover. The cover inhibition effects increased with the cover thickness. Particularly, the soil evaporation of the covered sands was less affected by external and internal factors than that of the bare sands. Moreover, the variation of daily evaporation of covered sands was smaller than that of bare sands. The cumulative evaporation varied linearly with time in the covered sands whereas it varied logarithmically in the bare sands. In addition, the soil evaporation in the bare sands showed significantly different characteristics in the early and late stages of the evaporation. (2) All the covers exhibited the significant inhibiting effect on the soil evaporation, and the inhibition efficiency increased logarithmically with the cover thickness. However, as the cover thickness was above a certain value, the increase in the inhibition efficiency was slow. Particularly, at a cover thickness of 2 cm, there was no obvious difference in the inhibition efficiency among all kinds of covers. The maximum inhibition efficiency as calculated from the daily evaporation on the first day of irrigation was: sand-litter mixed layer (79.92%) > litter layer (78.96%) > salt crust (75.58%) > sand bed (74.11%), whereas the average inhibiting efficiency as calculated from the cumulative soil evaporation at the end of an irrigation cycle (the fourth day) was: salt crust (67.78%) > sand-litter mixed layer (66.72%) > sand deposit (63.28%) > litter layer (61.74%).
Starting Page	137
Ending Page	145
Page Count	9
File Format	PDF
ISSN	10016538
Journal	Chinese Science Bulletin
Volume Number	53
Issue Number	2
e-ISSN	18619541
Language	English
Publisher	SP Science in China Press
Publisher Date	2009-04-15
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	Taklimakan Desert shelterbelt irrigation cover soil evaporation inhibition efficiency Engineering Earth Sciences Chemistry/Food Science Physics Life Sciences Science
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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