河西沙区新月形沙丘形态参数观测  

Characters of Geomorphologic Parameter About Banchan Dunes

作　　者：任孝宗[1] 刘陶[2] 王振亭[1,3] 

机构地区：[1]兰州大学西部环境教育部重点实验室,兰州730000 [2]中国科学院地质与地球物理研究所新生代地质与环境重点实验室,北京100029 [3]中国科学院沙漠与沙漠化重点实验室,兰州730000

出　　处：《水土保持研究》2010年第1期163-166,共4页Research of Soil and Water Conservation

基　　金：国家自然科学基金(批准号10904055)

摘　　要：新月形沙丘广泛分布于世界各沙漠,是最基本的沙丘形态之一。国内外众多学者对沙丘形态参数间的关系研究表明沙丘高度和宽度间存在线性关系。通过对河西沙区巴丹吉林沙漠和腾格里沙漠边缘典型新月形沙丘形态的高精度测量,并结合前人对民勤地区新月形沙丘的观测数据,用最小二乘法拟合发现高度和宽度呈正比例关系。并与库姆塔格沙漠5个新月形沙丘的比例系数比较,发现不同自然环境条件下发育的新月形沙丘的比例系数不一致,该系数可以作为描述新月形沙丘的一个特征参数。Barchan dunes occur widespread on desert all over the world,and are one of the basic dune shapes.The studys about dunes shape＇s parameter by researchers home and abroad indicated that the relationship between the height of dune and the width of dune＇s horn are linear.Using the high precision date that measured in Badain Jaran desert and Tengger desert of Hexi and the data measured by predecessor in Minqin,The relationship between the height of dune and the width of dune＇s horn is analyzed with least square method.It is indicated that they have the direct ratio relationship.Comparing with other 5 banchan dunes shape＇s parameter date in Kumtag Desert,it is found that the relationship between the dune height and the width of the dune＇s horn can be different in different geography and nature.And this direct ratio can be a geomorphologic parameter which describe the character of banchan dunes.

关 键 词：新月形沙丘 地貌特征参数 巴丹吉林沙漠 腾格里沙漠 

分 类 号：P941.73[天文地球—自然地理学]