干旱区生态环境知识资源中心(Arid): 古尔班通古特沙漠南缘固定沙丘坡面土壤水分动态随机模拟

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	古尔班通古特沙漠南缘固定沙丘坡面土壤水分动态随机模拟
其他题名	Hillslope-scale stochastic simulation of soil moisture dynamics in fixed dunes at the southern edge of Gurbantunggut Desert,China
	尹鑫卫 1; 郑新军 2; 李彦2 ; 胡顺军 3; 郭勇 1
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2019
卷号	30 期号:1 页码:146-156
中文摘要	为揭示土壤水分动态对干旱沙区坡面尺度水文和生态过程的影响机理,基于 Rodriguez-Iturbe土壤水分动态随机模型,通过修正模型输入项参数,获取干旱沙区坡面土壤水分动态随机模型,并利用20152016年古尔班通古特沙漠南缘固定沙丘坡面生长季根系层土壤水分观测数据及20002016年日降水资料,分析研究区生长季坡面土壤水分动态与土壤水分概率密度函数特征,探讨该坡面随机模型参数敏感性及应用可行性.结果表明:研究区生长季降水分布极不规则,以<5 mm降水为主,降水量主要源于>10 mm降水,降水间隔期以 <10 d为主,且东坡次降水量略大于西坡;东、西坡面生长季土壤水分年际变化与降雨分布基本一致,西坡根系层土壤含水率略低于东坡,且各坡面生长季根系层土壤水分均服从正态分布;该坡面随机模型模拟得到的不同坡面生长季根系层土壤水分概率密度函数的曲线特征(峰值及其位置、95%置信区间)与观测结果基本一致,一致性指数( CM)均大于0.5,说明该坡面随机模型能对研究区坡面土壤水分概率密度函数进行高效模拟,具有较好的适用性,可为干旱沙区植被生存或恢复研究及实施荒漠化防治生态建设工程提供理论基础和科学方法.
英文摘要	To examine the effects of soil moisture dynamics on hydrological and ecological processes at the hillslope scale in the desert region,a hillslope-scale soil moisture dynamic stochastic model in arid sandy based on Rodriguez-Iturbe soil moisture dynamic stochastic model ( RI model) was developed by modifying the input parameters of the model. Using the continuously monitored data of soil moisture in root zone during growing season from 2015 to 2016 and daily precipitation from 2000 to 2016 in a fixed dune at the southern edge of Gurbantunggut Desert,we analyzed soil moisture dynamics and probability density function of soil moisture on slopes in growing season and discussed the sensitivity of parameters of the stochastic model and its application feasibility. The results showed that the seasonal distribution of precipitation was irregular. The total number of annual precipitation was mainly derived from the precipitation of > 10 mm. The precipitation frequency and interval were dominated by <5 mm and <10 d,respectively. The precipitation in the eastern slope was slightly larger than that in the western slope. The interannual variability of soil moisture in the eastern and western slopes in the growing season was basically consistent with the rainfall distribution. The soil moisture in the root zone in the western slope was slightly lower than that in the eastern slope,and the soil water content in different slope positions followed a normal distribution. The curve characteristics of the soil moisture probability density function ( the curve peak value,the position of the peak,the confidence interval of 95%) in the root zone in the different slopes in growing season simulated by the hillslope-scale model were consistent with observed values,with the consistency measure ( CM) being higher than 0.5. Such a result indicated that the hillslope-scale stochastic model could be used for simulating the soil moisture probability density function in different slope positions in the study area,with a good applicability. This model could provide theoretical basis and scientific methods for vegetation survival or restoration and the implementation of ecological construction project of desertification control in arid sandy area.
中文关键词	固定沙丘 ; 土壤水分动态 ; 随机模拟 ; 概率密度函数 ; 古尔班通古特沙漠
英文关键词	fixed dune soil moisture dynamic stochastic simulation probability density function Gurbantunggut Desert
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:6426832
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239660
作者单位	1.中国科学院新疆生态与地理研究所;;中国科学院阜康荒漠生态国家野外科学观测研究站;;中国科学院大学, 荒漠与绿洲生态国家重点实验室;;中国科学院阜康荒漠生态国家野外科学观测研究站;;, 乌鲁木齐;;阜康;;, ;;新疆;;北京 830011;;831505;;100049; 2.中国科学院新疆生态与地理研究所;;中国科学院阜康荒漠生态国家野外科学观测研究站, 荒漠与绿洲生态国家重点实验室;;中国科学院阜康荒漠生态国家野外科学观测研究站, 乌鲁木齐;;阜康, ;;新疆 830011;;831505; 3.中国科学院新疆生态与地理研究所, 荒漠与绿洲生态国家重点实验室, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	尹鑫卫,郑新军,李彦,等. 古尔班通古特沙漠南缘固定沙丘坡面土壤水分动态随机模拟[J]. 中国科学院新疆生态与地理研究所,2019,30(1):146-156.
APA	尹鑫卫,郑新军,李彦,胡顺军,&郭勇.(2019).古尔班通古特沙漠南缘固定沙丘坡面土壤水分动态随机模拟.应用生态学报,30(1),146-156.
MLA	尹鑫卫,et al."古尔班通古特沙漠南缘固定沙丘坡面土壤水分动态随机模拟".应用生态学报 30.1(2019):146-156.