Abstract：
The Sistan region in Southeastern Iran is one of the world\'s most sensitive areas when it comes to sandstorms and wind erosion. One of the most influential factors in interpreting sandstorms is sand drift potential (DP), which is directly related to wind speed. Accurately, monitoring this phenomenon is still being determined, considering various temporal scales. Therefore, the main aim of this research is to analyze the trend of DP on monthly and annual scales. Our results showed that monthly variations of DP reached the highest and lowest values in July (609 VU) and January (47 VU), respectively. Blowing sand predominantly moved southeast, and the directional index fluctuated from 0.88 to 0.94. The annual DP was measured equal to 2700 VU, signifying a relatively high value when compared to other arid regions worldwide. The trend analysis results obtained from the Mann-Kendall test revealed both positive trends during the period 1987-2001 and negative ones from 2002 to 2016). However, the positive trend was found statistically insignificant. Furthermore, Sen\'s slope test results demonstrated that a negative trend could be observed with a steeper slope during July, September, and August, while a positive trend could be observed with a steeper pitch during November, December, and June. We recommend that land managers and stakeholders involved in controlling blowing sand using biological and physical methods should consider these trends in the Sistan region. Implementing nature-based solutions or control strategies should focus on these temporal sequences.
摘要：
伊朗东南部的锡斯坦地区是世界上沙尘暴和风蚀最敏感的地区之一。解释沙尘暴的最有影响力的因素之一是沙尘潜势（DP），这与风速直接相关。准确地说,监测这种现象仍在确定中，考虑各种时间尺度。因此,本研究的主要目的是分析每月和每年的DP趋势。我们的结果表明，DP的每月变化在7月（609VU）和1月（47VU）达到最高和最低值，分别。吹沙主要向东南移动，方向性指数从0.88到0.94波动。测量的年度DP等于2700VU，与世界其他干旱地区相比，这意味着相对较高的价值。从Mann-Kendall检验获得的趋势分析结果显示，1987-2001年期间的积极趋势和2002年至2016年的消极趋势）。然而,发现积极趋势在统计学上不显著。此外，森的斜率测试结果表明，在7月份斜率较陡的情况下，可以观察到负趋势，九月,八月,虽然在11月更陡的音调可以观察到积极的趋势，十二月,和六月。我们建议使用生物和物理方法控制扬沙的土地管理者和利益相关者应考虑锡斯坦地区的这些趋势。实施基于自然的解决方案或控制策略应专注于这些时间序列。
