干旱区生态环境知识资源中心(Arid): 巴丹吉林沙漠湖泊面积与水位的非线性关系模拟研究

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	巴丹吉林沙漠湖泊面积与水位的非线性关系模拟研究
其他题名	Modeling the nonlinear relationship between lake area and water level in Badain Jaran Desert, China
	郑瑞兰; 王旭升; 胡晓农
来源期刊	北京师范大学学报. 自然科学版
ISSN	0476-0301
出版年	2016
卷号	52 期号:3 页码:350-355
中文摘要	位于内蒙古阿拉善盟的巴丹吉林沙漠是中国第二大沙漠,以其存在世界上最高的沙山以及约100个湖泊而著称.现今湖面海拔一般为1150~1200 m,前人研究认为在过去3万年以来的某些时期存在更高的湖面.假设沙丘洼地的形态基本保持不变,可以根据现今湖泊洼地的三维形态来模拟高湖面时期的湖泊群分布特征和总面积.以90 m分辨率的DEM数据为基础,对若干典型洼地等高面面积随高程的变化进行了分析,发现可以用幂函数和多项式2种非线性方程模拟.多数情况下需要多项式,但一般只要达到3阶就可以精确拟合.对于湖泊洼地,由于很少有湖水最大深度的数据,湖底最低高程往往是未知的.利用湖面以上的等高面数据建立拟合程度最佳的非线性函数可以反推最低高程,但仍然存在不确定性.这一点对恢复历史上的高湖面形态并没有影响.
英文摘要	Badain Jaran Desert located on the Alxa Plateau in Inner Mongolia is the second largest desert in China. It is renowned for its tallest sand hills in the world as well as for about 100 lakes. The water level in the lakes ranges from 1150 m and 1200 m above the sea level. Previous studies have suggested higher water levels in the past 30 ka. Assuming that shapes of sand dunes and inter-dune depressions do not change, distribution of lakes and total lake area during those high-lake-level periods could be modeled from three-dimensional shape of the landscape. The 90 m-resolution DEM data are used to analyze relationship between area of the plan with an equal height and elevation of the plan in several typical depressions. Relationship is found to be approximated with two kinds of nonlinear equations: power or polynomial functions. In most cases third-order polynomial equation is available. The bottom elevation of a lake basin is usually unknown due to the lack of lake depth data. It can be estimated by nonlinear equations with optimized parameters for best fitting on area-level data in zone above the lake surface, but with certain uncertainties. This has no impact on rebuilding shape and size of lakes with higher water levels in history.
中文关键词	沙丘 ; 湖泊 ; 数字高程 ; 巴丹吉林沙漠
英文关键词	sand dunes lakes digital elevation model (DEM) Badain Jaran Desert
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:5733766
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233919
作者单位	中国地质大学(北京)水资源与环境学院, 北京 100083, 中国
推荐引用方式 GB/T 7714	郑瑞兰,王旭升,胡晓农. 巴丹吉林沙漠湖泊面积与水位的非线性关系模拟研究[J],2016,52(3):350-355.
APA	郑瑞兰,王旭升,&胡晓农.(2016).巴丹吉林沙漠湖泊面积与水位的非线性关系模拟研究.北京师范大学学报. 自然科学版,52(3),350-355.
MLA	郑瑞兰,et al."巴丹吉林沙漠湖泊面积与水位的非线性关系模拟研究".北京师范大学学报. 自然科学版 52.3(2016):350-355.