黑河中游临泽地区夏季露水的生成

干旱区研究 ›› 2011, Vol. 28 ›› Issue (3): 471-477.

黑河中游临泽地区夏季露水的生成

余绍文¹, 孙自永^2,3, 周爱国², 段丽军¹

1. 中国地质大学研究生院, 湖北武汉 430074;
2. 中国地质大学环境学院, 湖北武汉 430074;
3. 中国科学院寒区旱区环境与工程研究所, 甘肃兰州 730000

收稿日期:2009-11-27 修回日期:2011-02-23 出版日期:2011-06-25 发布日期:2011-09-06
作者简介:余绍文(1981-),男,湖北大冶人,博士研究生,主要研究方向为生态地质和环境地质.E-mail:yshw621@126.com
基金资助:
国家自然科学基金项目(40702042,40572140,40602030)和中国地质大学(武汉)优秀青年教师资助计划项目(CUGQNL0714)

Study on Dew Formation in Linze in the Middle Reaches of the Heihe River

YU Shao-wen¹, SUN Zi-yong^2,3, ZHOU Ai-guo², DUAN Li-jun¹

1. Graduate School, China University of Geosciences, Wuhan 430074, China;
2. College of Environmental Science, China University of Geosciences, Wuhan 430074, China;
3. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Received:2009-11-27 Revised:2011-02-23 Published:2011-06-25 Online:2011-09-06

摘要/Abstract

摘要： 对于降雨稀少的内陆干旱区,露水具有重要的生态学意义。在黑河中游的张掖市临泽县平川镇,于2008年6～9月利用人造面板法对露水进行了连续90 d的观测,发现:① 只有当露水收集板的温度低于露点时,露水才能生成;② 观测期间河岸带共生成露水52次,总生成量为4.26 mm,绿洲内共生成34次,总生成量为1.52 mm,戈壁共生成13次,总生成量为0.64 mm;③ 从旱季进入雨季,露水生成强度逐渐增大,雨季后期露水生成强度达到最大,此后又逐渐减小;④ 降雨有利于露水的生成,河岸带和绿洲内的露水生成受降雨影响显著,而只有当单次降水量达到一定阈值时戈壁才有露水生成;空气相对湿度、天气晴朗程度和风速也影响露水的生成。

关键词: 夏季, 凝结水, 露水, 水汽吸附, 生成量, 黑河流域

Abstract: Dew plays an important role in maintaining ecosystems in arid area. In order to study the dew formation, a series of observations on dew yield were conducted in Linze County, Zhangye City in the middle reaches of the Heihe River during the period from June to September 2008. The results are as follows: (1) Dew formed only when the board temperature was lower than dew point, and dew yield and occurred times were decreased with the increase of distance away from the Heihe River and of groundwater depth as well as the decrease of vegetation coverage; (2) Dew occurred for 52, 34 and 13 times and the accumulated dew yields were 4.26 mm, 1.52 mm and 0.63 mm in riparian zone, oasis and desert respectively during the period from June 20 to September 17, 2008. There was also a temporal variation of dew yield at all three observation sties; (3) Dew intensity and average dew yield were increased from dry season to rainy season, and vice versa; and (4) It is found that rainfall is favorable for increasing dew yield at all three sites, and dew could form in desert only if previous rainfall exceeded a certain amount. Air relative humidity, weather and wind speed also affect dew formation.

Key words: summer, condensation water, dew, water vapor adsorption, dew yield, Heihe River

中图分类号:

P426.321

余绍文, 孙自永, 周爱国, 段丽军. 黑河中游临泽地区夏季露水的生成[J]. 干旱区研究, 2011, 28(3): 471-477.

YU Shao-wen, SUN Zi-yong, ZHOU Ai-guo, DUAN Li-jun. Study on Dew Formation in Linze in the Middle Reaches of the Heihe River[J]. , 2011, 28(3): 471-477.

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