Numerical simulation of the evolution and propagation of aeolian dune fields toward a desert-oasis zone

被引：15

作者：

Bo, Tian-Li ^{[1
]}

Zheng, Xiao-Jing

机构：

[1] Lanzhou Univ, Key Lab Mech Western Disaster & Environm, Lanzhou 730000, Peoples R China

来源：

GEOMORPHOLOGY | 2013年 / 180卷

基金：

国家教育部科学基金资助; 中国国家自然科学基金;

关键词：

Desert-oasis transitional zone; Propagation speed; Edge of desertified land; Vegetation coverage; Straw checkerboard area; SAND DUNES; TRANSVERSE DUNES; PARABOLIC DUNES; AIR-FLOW; VEGETATION; TRANSPORT; MODEL; BARCHAN;

D O I：

10.1016/j.geomorph.2012.09.002

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

In this study, the evolution and propagation of aeolian dune fields toward a desert-oasis transitional zone are numerically investigated through considering the spatial variation of wind speed and the influence of vegetation on sand erosion and transportation etc. The propagation speed at the edge of desertified land and the influence of a straw checkerboard are quantitatively analyzed. Results show that evolution time, wind speed and sand diameter have obvious impacts on the propagation of desert and desertified land. A formula describing the propagation speed of desertified land with respect to wind speed and vegetation coverage is given. In addition, when considering the effects of straw checkerboards, the propagation speed of the downwind desertified land is found to be related to the length of and distance from the checkerboard area. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：24 / 32

页数：9

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