This volume has its roots in the distant past of more than 20 years ago, the International Hydrologic Decade (IHD), 1964-1974. One of the stated goals of the IHD was to promote research into groundwater situations for which the state of knowledge was hopelessly inadequate. One of these problem areas was the hydrology of carbonate terrains. Position papers published early in the IHD emphasized the special problems of karst; carbonate terrains were supposed to receive a substantial amount of attention during the IHD. There were indeed many new contributions from European colleagues but, unfortunately, in the United States the good intentions were not backed up by much in the way of federal funding. Some good and interesting work was published, particularly by the U. S. Geological Survey (USGS), but in the academic community the subject languished. About this same time the Cave Research Foundation (CRF), organized in 1957 to promote the systematic exploration, survey, and scientific study of the great cave systems of Mammoth Cave National Park, was casting about for a broader scope for its research activities. Up until that time, CRF research had been largely restricted to detailed mineralogical and geological investigations within the caves, with the main part of the effort concentrated on exploration and survey. The decision to investigate the hydrology required a certain enlargement of vision because investigators then had to consider the entire karst drainage basin rather than isolated fragments of cave passage.
★登月第一人阿姆斯壯唯一親授傳記★ ★普立茲歷史獎提名作者詹姆斯・韓森獨家親訪★ 完整公開歷史上最魔幻任務的冒險者生命故事 ...
The designer was Major John Wesley Powell , a man Any number of levels of scale might emerge in the future , whom one does not usually think of as a shaper of landscapes but for the present , all we can do is group the possible or even ...
First in a two-volume set describing and illustrating over 2400 species of Australian marine prosobranch gastropods including information on geographic distribution, habitat and synonymies. Provides an introduction dealing with collecting...
Paul N. Cheremisinoff B. W. Boreham. 2,067 ug m - 3 . The second lowest concentration ( 45 ug m - 3 ) has been observed at the nonurban station Sinhagad , which is a hill station . The low concentration at Sinhagad is attributed not ...
本书共九章。主要内容包括基本理论与国内外研究概况、全球气候变化与广东省气候特征、人类活动与经济社会发展趋势、表生地质环境条件与地质灾害、灾害矿物学的方法与实践、 ...
本书介绍了"大北方探险"这次最浩大的科考行动,也是人类历史上规模最大,耗时最久以及获取最多赞助的单次科考事件,其路线从圣彼得堡开始,一路向东,横穿西伯利亚,最终跨海远行 ...
盤古大陸是什麼?大陸到底有沒有漂移?地球上的所有陸地,是不是曾經都黏在一起?令人害怕的地震是怎麼來的?要怎麼找出震央的位置?地震的規模有多大、強度有多強,又怎麼 ...
地質學家要如何解讀地球歷史、為地球測定年齡?化石是怎麼生成的?對我們瞭解地球的過去有何助益? ...
身上拂過的風,抬頭仰望的星空,不再只是充滿詩意與哲理的想像,對於其中的變化,更能了了分明,沒有疑惑。 ...
1)计算机操作系统。这是由厂家提供的软件,与一般计算机组成中的操作系统概念一致,解析测图仪的实时程序与应用程序由它负责管理和支持。 2)摄影测量系统。它包括实时程序和应用程序。(1)实时程序的计算速度应大于30周/s,即从极高的频率实现重复计算。