干旱区生态环境知识资源中心(Arid): 干旱人工固沙植被区土壤水分动态随机模拟

Arid

	干旱人工固沙植被区土壤水分动态随机模拟
其他题名	Probabilistic Modelling of Soil Moisture Dynamics in a Revegetated Desert Area
	黄磊; 张志山; 陈永乐
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2013
卷号	33 期号:2 页码:568-573
中文摘要	土壤水分是陆地水循环过程的关键环节,是联系陆地水文过程与生态过程的纽带。随着全球极端气候事件的频繁发生,土壤水分随机模拟逐渐成为当前生态水文学研究的热点。利用20082011年生长季土壤湿度连续监测数据及19912011年日降水资料,结合Rodriguez-Iturbe土壤水分动态随机模型,模拟了沙坡头人工植被区生长季土壤水分动态与土壤湿度概率密度函数特征。结果表明:人工固沙植被区生长季土壤水分年际变化与降雨分布一致。20082011年生长季植物根际层(0~60cm)土壤湿度概率分布基本呈单峰状,20cm处的土壤水分峰的阔度较其他土层相对土壤湿度峰较宽,并且分布也出现了一定程度的跳跃。而随着土层厚度的增加,在40cm和60cm的土壤水分概率分布峰的阔度也较小,与Rodriguez-Iturbe土壤水分动态随机模型模拟结果一致。说明Rodriguez-Iturbe模型在干旱人工植被区也具有很好的适用性,可以对荒漠人工植被恢复区的土壤水分统计特征进行很好的模拟,为以后干旱沙区随机生态水文模型的建立奠定基础。
英文摘要	Soil moisture was the key link between land hydrological and ecological processes, which had play an important role in the terrestrial water cycling. With frequent and extreme weather events in recent years, the stochastic simulation of soil moisture has gradually become the research focus in ecohydrology. Based on the continuous monitoring soil moisture data from 2008 to 2011, the historical precipitation data from 1991 to 2011, and combined with the Rodriguez-Iturbe soil moisture dynamic stochastic model, we studied the soil moisture dynamics and its probability density function in a revegetated desert area. Results showed that, the annual soil moisture dynamics changed with the rainfall distribution, and the probability distribution showed a single peak-shaped in the plant rhizosphere layer (0-60 cm), the peak width in the topsoil mositure 20 cm was larger than the others, and the distribution also appeared a certain degree of jump. The 40 cm and 60 cm of soil moisture probability distribution peak width was smaller, which was in accordance with the simulation results of Rodriguez-Iturbe model. Those results confirmed that stochastic model also had a good applicability in arid desert areas and could be well used in describing the statistical characteristics of soil moisture.
中文关键词	人工植被区 ; 土壤水分 ; Rodriguez-Iturbe模型 ; 土壤湿度概率密度函数
英文关键词	revegetated desert area soil mositure Rodriguez-Iturbe model probability density functions of soil mositure
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4804644
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230593
作者单位	中国科学院寒区旱区环境与工程研究所沙坡头沙漠试验研究站, 甘肃省寒区旱区逆境生理与生态重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	黄磊,张志山,陈永乐. 干旱人工固沙植被区土壤水分动态随机模拟[J]. 中国科学院西北生态环境资源研究院,2013,33(2):568-573.
APA	黄磊,张志山,&陈永乐.(2013).干旱人工固沙植被区土壤水分动态随机模拟.中国沙漠,33(2),568-573.
MLA	黄磊,et al."干旱人工固沙植被区土壤水分动态随机模拟".中国沙漠 33.2(2013):568-573.