塔克拉玛干沙漠荒漠过渡带春季风沙活动特征——以肖塘为例

摘要/Abstract

摘要： 通过对沙尘暴强化观测试验期间风速、跃移颗粒数、输沙量等资料的统计与计算,对塔克拉玛干沙漠北缘荒漠过渡带肖塘地区春季风沙活动进行了研究。结果表明,肖塘地区春季2 m高度1 s时距的起沙风速为4.9～5.0 m·s-1,1 min时距的起沙风速为4.4 m·s-1;起沙风速随着风速等级的增加,出现的频率相应减少,主要集中在4.4～8.4 m·s-1 之间;输沙势、输沙量的方位分布与起沙风相似,以ENE、E和ESE 3个方位为主,观测期间（1个月）总输沙势为80.8 VU,合成输沙势为13.7 VU,合成输沙势方向为241°;最大可能输沙总量为1 921.8 kg·m-1,合成输沙量为286.8 kg·m-1,合成输沙方向为235°,与输沙势的合成方向一致。

关键词: 风沙活动, 起沙风速, 输沙势, 输沙量

Abstract: The characteristics of blown-sand activities in spring in the desert transitional zone (Xiaotang area) of the Taklimakan Desert are studied through data statistics and calculation of wind velocity, saltation particles number and sand transporting quantity. At the height of 2 m above ground surface, the instant sand-laden wind velocity for naturally mixed sands is about 4.9 m·s-1 at one-second interval, and it is about 4.4 m·s-1 at one-minute interval. With the increase of wind velocity, its frequency decreases gradually, and the most are from 4.4 m·s-1 to 8.4 m·s-1. Similar to the distribution of t sand-laden wind velocity, the distribution of drift potential and sand transporting quantity is mainly in ENE, E and ESE directions. During the observation period from April 15 to May 14, the total drift potential is 80.8 VU, the resultant drift potential is 13.7 VU, resultant drift potential direction is 241°; the total maximum possible sand transporting quantity is 1 921.8 kg·m-1, the resultant sand transporting quantity is 286.8 kg·m-1, and the resultant sand-transporting direction is 235.

Key words: blown-sand drift activity, sand-laden wind velocity, drift potential, sand transporting quantity

中图分类号:

X169

杨兴华, 李红军, 何清, 艾力·买买提明, 霍文, 刘新春. 塔克拉玛干沙漠荒漠过渡带春季风沙活动特征——以肖塘为例[J]. 中国沙漠, 2012, 32(4): 915-920.

YANG Xing-hua, LI Hong-jun, HE Qing, AI Li-·Mai-mai-ti-ming, HUO Wen, LIU Xin-chun. Blown Sand Activities in Spring in the Desert Transitional Zone of the Taklimakan Desert—A Case in Xiaotang Area[J]. JOURNAL OF DESERT RESEARCH, 2012, 32(4): 915-920.

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