输沙量与输沙势的关系  

Relationship between Sand Transport and Sand Drift Potential

作　　者：张正偲[1] 董治宝[1] 赵爱国[1] 钱广强[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室,甘肃兰州730000

出　　处：《中国沙漠》2011年第4期824-827,共4页Journal of Desert Research

基　　金：国家自然科学基金项目(40801007)资助

摘　　要：区域风沙活动在时间、空间和强度上的不确定性,导致对输沙量进行长期测定比较困难。所以,输沙量通常是用来研究短期的风沙活动强度,对长期的风沙活动强度,一般是利用输沙势来衡量,使用这两种指标评价区域风沙活动强度,势必会产生一定的差异。利用中国科学院风沙科学观测场积累的长期输沙量和输沙势观测资料,对区域风沙活动强度进行评价。研究结果表明,月输沙量变化在0.89～18.11kg.m-1之间,而月输沙势变化在0.03～21.01之间,每年的4—5月是风沙活动最为强烈的时期;输沙量随输沙势增加而增加,它们之间可以近似用线性函数来表达。Because of the uncertainty of aeolian activities in temporal,spatial and intensity dimensions,it is difficult to measure sand transport during a long period,so sand transport is just used to assess aeolian activities during a short time.Sand drift potential（DP） is often used to assess regional aeolian activity during a long period.Different indices can cause bias in regional aeolian activity assessment.We have accumulated first-hand sand transport and sand drift potential data for three years in the Blown Sand Observation Station of the Chinese Academy of Sciences.The analyzing results of regional aeolian activity indicated that sand transport in the study region was 0.89~18.11 kg·m-1 in every month from 2005 to 2008,and DP ranged in 0.03~21.01.Aeolian activity was the most serious in April and May in every year in the region.Sand transport increased with DP,and there was a linear relationship between sand transport and sand drift potential.

关 键 词：风沙活动 输沙量 输沙势 

分 类 号：X144[环境科学与工程—环境科学]