我国西北干旱地区内陆河流域下游土地荒漠化及其对策

<正> 我国西北干旱地区内陆河流域范围相当广阔,计有200多万km~2,占国土面积的20％以上。在这样广阔的土地上,自然资源正在不断开发利用,工农业生产随之突飞猛进,社会、经济日益繁荣,出现了一派蓬勃发展的景象。但由于在开发利用过程中人们认识自然规律不够,未能注意到流域生态系统特点 因之,出现了较严重的土地荒漠化问题,给国计民生带来一些不利后果,需要引起重视和采取有力对策,加以防治。

THE DESERTIFICATION OF LAND AND ITS COUNTERMEASURES IN THE LOWER REACHES OF INTERIOR RIVERS IN THE ARID ZONES OF NORTHWESTERN CHINA

Land desertification occurs mainly in natural and artificial oasis in thelower reaches of continental rivers. This paper presents the main expressionof land desertification. Land desertification obviously finds expression in thesuccession of soil and vegetation and the succession of soil and vegetation indifferent districts is discussed in detail. It is pointed out in the paper thatthe land desertification is closely related to the artificial regulation of waterresources. In consideration of the economic benefits,ecological status and socialeffect, according to the characteristics of different river basins, specificcountermeasures are used for local conditions.