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20 0 0年春季 ,沙尘暴频频席卷我国北方 ,不仅给人民生活带来极大不便 ,而且使农业、交通、通讯等行业生产遭受巨大损失。资料表明 ,沙尘暴天气在我国发生的频率呈逐年增加的趋势 ,危害越来越严重 ,其原因主要有 5点 :气温增高 ,使地表水分散失加速 ;降雨减少 ,土壤含水量减少 ;气候反复无常 ,大风天气增多 ;生态条件恶化 ,植被生长发育受制 ;人为活动恶化了生态环境。面对沙尘暴的威胁 ,需采取利用现代科学技术 ,适时人工降雨 ;植树种草 ,增加植被 ;改革耕作方式 ,蓄水保墒三项战略性措施 ,以有效遏制沙尘暴的发生
In the spring of 20o007, dust storms frequently swept through the north of our country, causing great inconvenience to people’s lives and causing huge losses to the production of agriculture, transportation and communications. The data show that the frequency of sandstorm weather in our country is increasing year by year, the harm is more and more serious. There are five main reasons for this: the increase of temperature, the acceleration of surface water loss; the decrease of rainfall and the decrease of soil water content; Increasing windy weather; deteriorating ecological conditions, vegetation growth and development control; human activities worsened the ecological environment. The face of the threat of sandstorms, the need to take the use of modern science and technology, timely artificial rainfall; planting trees, increasing vegetation; reform of farming methods, water and soil moisture three strategic measures to effectively curb the occurrence of sandstorms