输沙量与输沙势的关系

 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0.89~18.11 kg·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。

Relationship between Sand Transport and Sand Drift Potential

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 S...