The source of dust outside the desert is also a factor that can not be ignored. In the north of China, the climate is dry in spring, the wind is strong, the soil moisture is poor, and the vegetation is sparse. In case of windy weather, the surface dry soil is easy to be blown by the wind, forming dust. The suburban area is also one of the sources of sand lifting due to the construction of broken soil, the accumulation of building materials and the unreasonable stacking of garbage.
有关防治对策的探讨
Discussion on prevention and control measures
我们要树立的一个信心是,人类现有的科学技术可以遏制或减轻沙尘暴对人类的危害。防御沙尘暴的长远对策是从根本上改善生态环境,人为改变荒漠和半荒漠地表现状以及恶劣的生态环境。下面就介绍几种防风固沙工程:
We should establish a confidence that the existing science and technology of human beings can contain or reduce the harm of Sandstorm to human beings. The long-term countermeasures to prevent sandstorm are to fundamentally improve the ecological environment, artificially change the surface status of deserts and semi deserts and the poor ecological environment. Here are some wind and sand control projects:
一是机械沙障,主要用杂草、树枝以及其他材料,在流沙上设置阻滞风沙流和固定沙面的障碍物。例如,草方格沙障是用稻草、麦秆和芦苇等柔性材料,将其直接插入沙层内,直立于沙丘上,扎设成方格状,粘土沙障是有粘土碎块堆成小土埂而成。如果你乘火车经过宁夏回族自治区的沙坡头,就会看到很多的这种机械沙障的景观。
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