[1]李海生,李广*,刘贤德*,等. 祁连山不同海拔梯度下青海云杉林积雪消融过程研究[J].西北林学院学报,2017,32(4):1-6.[doi:10.3969/j.issn.1001-7461.2017.04.01]
 LI Hai-sheng,LI Guang*,LIU Xian-de*,et al. Snowmelt Process in Picea crassifolia Forest Land at Different Elevations in Qilian Mountains[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2017,32(4):1-6.[doi:10.3969/j.issn.1001-7461.2017.04.01]
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 祁连山不同海拔梯度下青海云杉林积雪消融过程研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第32卷
期数:
2017年第4期
页码:
1-6
栏目:
出版日期:
2017-07-31

文章信息/Info

Title:
 Snowmelt Process in Picea crassifolia Forest Land at Different Elevations in Qilian Mountains
文章编号:
1001-7461(2017)04-0001-06
作者:
 李海生1李广1*刘贤德12*王顺利2赵永宏1
 (1.甘肃农业大学 林学院,甘肃 兰州 730070;2.甘肃省祁连山水源涵养林研究院,甘肃 张掖 734000)
Author(s):
 LI Hai-sheng1LI Guang1*LIU Xian-de12*WANG Shun-li2ZHAO Yong-hong1
 (1.College of Forestry,Gansu Agricultural University,Lanzhou,Gansu 730070,China;2.Academy of Water Resources Conservation Forests in Qilian Mountains of Gansu Province,Zhangye,Gansu 734000,China)
关键词:
 青海云杉林积雪消融海拔梯度坡位坡向祁连山
Keywords:
 Picea crassifolia snowmelt rate altitude slope position slope direction Qilian Mountain
分类号:
S791.189
DOI:
10.3969/j.issn.1001-7461.2017.04.01
文献标志码:
A
摘要:
 积雪消融是北方地表重要的水文过程,与森林植被有着极其紧密的关系。以祁连山大野口流域不同海拔梯度下青海云杉林内积雪为研究对象,在积雪消融期选择典型样地作为观测点,通过野外实测降雪量、积雪厚度、空气温度、土壤温度、郁闭度等观测指标,系统研究了积雪消融与温度、海拔高度和郁闭度等之间的关系。结果表明:1)积雪消融主要发生在10月到翌年4月,并随青海云杉林内温度和土壤温度先降低后增大,积雪消融速率呈“V”字形变化模式,在1月最小,不同海拔高度平均为0.51 mm·d-1。2)积雪密度、降雪量、积雪厚度和雪水当量都随海拔的升高而呈现递增的趋势,积雪厚度与雪水当量、郁闭度、差异极显著(P<0.01),与降雪量差异显著(P<0.05)。3)在同一海拔不同坡位的青海云杉林,积雪厚度大小为下坡>上坡>中坡,雪消融速率为下坡>中坡>上坡;不同坡向,积雪消融速率为半阳坡>半阴坡>阴坡。4)2 700 m林缘和林内的积雪消融速率都呈现先减后增的变化趋势,1月份消融速率最小,林缘积雪消融值为1.35 mm·d-1,林内积雪消融值为1.22 mm·d-1;4月份消融速率最大,林缘消融值为12.03 mm·d-1,林内消融值为9.01 mm·d-1
Abstract:
 Snowmelt is an important hydrological process in northern China,which has very close relationship with forest vegetation.Snows occurred in Qinghai spruce forest under different elevations in the Dayekou basin of the Qilian Mountains were taken as research object,the typical sampling sites were chosen as the observation points during the snowmelt period.Indices such as snowfall,snow thickness,air temperature,soil temperature,and canopy density were measured in these sites.The relationship between snowmelt and temperature,altitude and canopy density was systematically studied.The results indicated that 1) snowmelt occurred during October to April of next year.The rate of snowmelt decreased and then increased with forest interior temperature and soil temperature,showing a “V-type” curve.The minimum rate occurred in January (0.51 mm·d-1).2) Snow density,snowfall,snow cover thickness and snow water equivalent were all progressively increased with the increase of elevation.Very significant differences were found between the thickness of the snow cover and the factors such as snow water equivalent and canopy density (P<0.01).Differences between the thickness and snowfall were significant (P<0.05).3) The rank of snow cover thickness at the same elevation but different slope positions was down-slope > up-slope > mid-slope.The rank of snowmelt rate at the same elevation but different slope positions was down-slope > mid-slope > up-slope.4) The snowmelt rate in inferior forest and edge 2 700 m above the sea level decreased first and then increased,and the minimum rate occurred in January: 1.35 mm·d-1 for forest edge and 1.22 mm·d-1 for the inferior forest.The maximum rates were found in April: 12.03 mm·d-1 for the forest edge and 9.01 mm·d-1 for the inferior forest.

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备注/Memo

备注/Memo:
 收稿日期:2016-11-12修回日期:2017-02-09
基金项目:国家自然科学基金项目(91225302,91425301,31360201)。
作者简介:李海生,男,在读研究生,研究方向:森林生态。E-mail:18419060785@163.com
*通信作者:李广,男,教授,博士,研究方向:农业信息技术。E-mail:lig@gsau.edu.cn刘贤德,男,研究员,博导,研究方向:森林生态。E-mail:liuxiande666@163.com
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