沙丘荒漠

Base on comparison with the remote sensing data in 1982 and 2000 and field investigation, the results of land cover and land use change were obtained by the method of landscape analysis. Ten types of land use were identified: riparian woods, riparian shrubbery, desert shrubbery, desert grassland, river-way and water area, salinised land, town, Gobi, shift sand dune, denudative upland. The results show that,(1) there were obvious changes in land cover structure.

根据黑河下游额济纳绿洲土地生态分类，利用1982年与2000年2期TM遥感数据对比和野外实地调查，采用景观生态空间分布格局分析方法，分为河岸乔木林、河岸灌草林、荒漠稀疏灌丛、荒漠稀疏草地、河道与水域、盐碱化土地、城镇、戈壁、流动沙丘和剥蚀地山丘陵，从各类土地分布面积变化和类型转移趋向与幅度两个方面，分析了额济纳绿洲20年来土地覆被变化。

Forty years of re-vegetation, mainly by xerophytic shrubs Artemisia ordosica Krasch and Caragana korshinskii Kom, in the Shapotou Desert Experimental Research Station has established a dwarf-shrub and herbaceous cover on stabilized sand dunes.

：在草原化荒漠带沙坡头地区，利用草方格沙障并栽植灌木柠条和半灌木油蒿对流动沙丘进行固定，经过40a的演变，逐渐形成由矮灌木与草本植物覆盖的固定沙丘景观。

They are regularly distributed in the Tarim Basin according to the influx of the dry heat from the Kuruktag, from Mongolia, and the branches of reverse air currents from Siberia which blow from the northeast of the Basin which account .or the gradual sloping of the sand hills, sand dunes, and ridges all facing the north -northeasterly direction, and their steeper slopes all facing the west-southwesterly direction.

它们的分布很规律，大部分与从库鲁克山吹来的干热风以及来自干燥的蒙古，西伯利亚反气旋的分支，由东北部向塔里木盆地方向侵入有关。因此，这里所有荒漠上的新月型沙丘、沙岗和沙脊，它们的缓坡一律面向北偏东，陡坡一律面向西偏南。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。