保卫沙漠第一泉

在甘肃敦煌市南6公里处,在鸣沙山环抱之中,一汪清泉形如半月,这就是闻名遐迩的天下沙漠第一泉——月牙泉。月牙泉被鸣沙山四面环抱,但在历史的风景线里,碧波荡漾,不为流沙所掩,沙山与清泉共处,可叹为世界自然地貌之奇观。干百年来,人们面对这一沙海奇观,始终感到奇怪,处在茫茫沙海之中的月牙泉又为何“泉映月而无尘”、“月泉晓澈,亘古沙不填泉,泉不涸竭？”这大自然创造的奇迹,古人百思不得其     

Adaptation of Nitraria sphaerocarpa to wind-blown sand environments at the edge of a desert oasis

This study addresses the adaptation of Nitraria sphaervcarpa to blown sand at the edge of a desert oasis with regard to the aspects of soil seed banks, seedlings, and population. Horizontally, the total number of seeds per unit area decreased from the shrub canopy center to intershrub areas, and most seeds were found under shrub canopies. Vertically, the highest proportion of seeds was found at depths of 5-10 cm. The emergence percentage, seedling mass, and seedling height, which were significantly affected by both burial depth and seed size, were highest at the optimal burial depth of 2 cm, and decreased with increasing burial depth in each seed size-class. Although seedling mass was usually greatest for large seeds and least for small seeds at each burial depth, little difference was observed in seedling height at shallow burial depths of 0-3 cm. The population shows a patchy and discontinuous distribution pattern. Population height increases with increasing sand depth. Also the density increases with increasing depth of sand in the desert; however, there is a steady decrease when the depth of sand is more than 100 cm. This result indicates that the depth of sand that is most suitable for the growth of Nitraria sphaervcarpa is 100 cm. The size of the population is significantly correlated with the sand depth, which increases with increasing depth in the desert.     

智利科皮亚波矿难救援中的领导力

2010年8月5日下午,智利阿塔卡马沙漠中的圣何塞铜矿内,70多万吨的岩石突然塌落,中央通道被堵.靠近入口的矿工受到惊吓,很快逃了出来,但有33人被困地下. 地下矿山事故并不罕见,但科皮亚波矿难在很多方面都是史无前例的:矿工被困的深度、岩层不稳定、事故煤矿差得出了名的安全记录等等.事发2天后,第二次落石又把通风井堵住....     

以色列的沙漠治理与水资源利用

本文介绍了以色列在治理沙漠、水资源管理与立法方面的具体实践，特别介绍了以色列为治理沙漠、改善环境所采取的三种主要方法。文章还介绍了以色列同中国方面的合作情况。     

海湾地区沙漠环境条件对飞机使用性能的影响

海湾地区沙漠环境条件对飞机使用性能的影响机械部广州电器科学研究所魏铭炎１多国部队各类飞机在海湾战争中的性状在１９９１年震惊世界的为期４２天的海湾战争中，以美国为主的多国部队总共出动飞机达１１万架次之多，平均每分钟１．８架次；美国空军５种主要战斗机的全...     

塔克拉玛干沙漠自然环境条件及其对机电设备的影响

据悉,位于我国塔里木盆地的塔克拉玛干大沙漠,是世界上唯一未经开发的大沙漠。据西方权威人士在七十年代估计,中国荒凉的西部心脏地带,潜在石油储量可能大于沙特阿拉伯的总量。经过我国多年勘探结果表明,该地区油、气储量极为丰富,开发远景十分可观。本文为我们近年调研的初步结果。     

美军三大自然环境试验中心

介绍了美军三大自然环境试验中心———沙漠环境试验中心、寒冷地区试验中心及热带地区试验中心的职能,并叙述了3个试验中心所能进行的有关测试项目。     

城镇生活污水就近引灌沙漠造林

城镇生活污水排入水体，严重影响水资源的使用价值。沙漠地区因缺水，造成许多地方造林失败。本文提出了城镇生活污水就近引灌沙漠造林的构想，从经济和环境影响两个方面将其与传统方案进行了比较，结果表明，新方案优势明显。