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1.
水资源短缺一直制约着京津唐地区经济和社会的发展。20世纪70年代,因缺水引发的经济、社会问题逐渐凸显,促使中央和地方政府开始考虑实施跨流域调水工程。引滦工程作为北方最大的跨流域调水工程,其决策经历了曲折的过程。1958年,北京和唐山曾分别提出引滦河水的设想,唐山还实施了引滦入还和引还入陡工程。1972年,海河流域大旱促使中央做出加快实施引滦工程的决定,但由于地质情况复杂等原因,引滦工程设计方案被反复修改。1981年,天津提出了单独引滦济津路线并得到了中央的支持。引滦工程对缓解京津唐用水紧张发挥了重要作用,天津是引滦工程受益最大的地区。 相似文献
2.
William R. Farrand 《Journal of archaeological science》1979,6(4):369-392
Analysis of sediments from the sites of et-Tabun, Jebel Qafza, and Sefunim in Israel, of Ksar 'Aqil in Lebanon, and of Yabrud Rockshelter I and Jerf 'Ajla in Syria leads to a reconstruction of the environments of deposition, periods of weathering and erosion, and relations to changing sea level during the times of occupation of these sites by prehistoric man. The overlapping sequences span the interval from part or all of the last interglaciation through the time of the last glaciation into historic time. Aeolians and from the last interglacial littoral zone and aeolian silt from more distant deserts dominate the site sediments until the early part of the last glaciation (especially at Tabun), whereas colluvial slope deposits, alluvium (Ksar 'Aqil), and angular rockfall debris are characteristic of the mid-last glaciation sediments in most sites, commonly with an admixture of reworked terra rossa soil sediment. These latter sediments seem to reflect a period or periods of greater available moisture or surface run-off. Prominent unconformities mark many sites at times coincident with the final middle palaeolithic (mousterian) occupations or in the interval between middle palaeolithic and upper palaeolithic occupations. It is not clear, in the absence of firm radiometric dates, whether these hiatuses should be correlated from site-to-site or whether they are site-specific. Freeze/thaw phenomena appear not to have played a significant role, if any at all, in the origin of sediments in coastal Levantine sites, although the middle palaeolithic of the Syrian Desert (Yabrud, Jerf 'Ajla) is contained in typical cryoclastic rubble. Finally, the reconstructed sedimentary environments are compared with the still-too-sparse palynological record for the Near East. Parallels of more humid and less humid climatic intervals throughout the past 60,000 to 70,000 years in both of these records reinforce the growing impression of a regionally fluctuating climate in the eastern Mediterranean region during the time of the last glaciation. 相似文献
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We consider the history, present, and future of radiocarbon dating in the American Southeast. We point out some of the past and present flaws related to archaeological research and dating. Our approach to this review is rooted in the perspective that each radiocarbon date collectively adds to our knowledge of the region and not just a particular site. Based on our observations, we suggest some “good” practices with respect to certain aspects of radiocarbon dating. Our concluding discussion considers Bayesian chronological analysis and the growing contribution of chronological modeling to the Southeast. 相似文献
4.
雍正三年,台湾县知县周钟蠧被控贪污,由于牵涉到闽台财政改革的大背景,此案引起了雍正皇帝的高度关注,并演变为震动闽台官场的一桩大案,涉案人等都被卷入了皇权与地方官员博弈的大漩涡。案件的审理过程,伴随着闽台财政改革的全过程,从清查仓谷亏空,到耗羡归公和养廉银制度化的最终完成。透过考察周钟蠧案,闽台地区财政改革的过程得以完整呈现。在皇权的强势施压下,闽省官员提出的耗羡归公方案显得仓促而草率。 相似文献
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江苏邳州梁王城遗址西周墓地出土了67例西周人骨,对其性别、年龄、人口寿命、体质类型、身高情况的分析特别是对颅骨形态特征的研究表明,梁王城西周组居民属于蒙古人种,具有中颅型结合高颅、狭颅的特点,同时具有狭额、高眶、阔鼻、正颌的面部特征,并且具有长狭的下颌。梁王城西周组居民的颅型与现代亚洲蒙古人种的东亚类型最为接近;面部特征与东亚类型、北亚类型比较接近;体质形态与河南、陕西、甘肃、青海出土的同时代人骨存在一定差异,但这种差异小于梁王城西周组与梁王城大汶口组、殷墟中小墓III组、滕州前掌大B组之间的差异。 相似文献
7.
Federico Ferretti 《对极》2019,51(4):1123-1145
This paper argues for a rediscovery and reassessment of the contributions that humanistic approaches can make to critical and radical geographies. Based on an exploration of the archives of Anne Buttimer (1938–2017) and drawing upon Paulo Freire's notion of conscientização (awareness of oppression accompanied by direct action for liberation), a concept that inspired the International Dialogue Project (1977–1988), I explore Buttimer's engagement with radical geographers and geographies. My main argument is that Buttimer's notions of “dialogue” and “catalysis”, which she put into practice through international and multilingual networking, should be viewed as theory‐praxes in a relational and Freirean sense. In extending and putting critically in communication literature on radical pedagogies, transnational feminism and the “limits to dialogue”, this paper discusses Buttimer's unpublished correspondence with geographers such as David Harvey, William Bunge, Myrna Breitbart, Milton Santos and others, and her engagement with radical geographical traditions like anarchism, repositioning “humanism” vis‐à‐vis the fields of critical and radical geography. 相似文献
8.
This article compares and contrasts the approaches of the NewDeal Federal Writers' Project and the Columbia Oral HistoryProgram in an effort to reconsider the paradoxical history oforal history research in the United States and its relationshipto how many oral historians today look at their work and thehistory of their field. As it turns out, the theoretical andsocial concerns of the FWP projects are closer to current theoreticalconcerns of oral historians than the work Allan Nevins conductedin the early years of the Columbia project. The article alsoshows how awareness of the history of the intellectual and culturalcurrents that affect oral history projects in general, and theFWP's work in particular—interviews with former slaves,tenant farmers, industrial workers, and members of ethnic minorities—canhelp us analyze and use those materials. It argues that an awarenessof continuity and discontinuity in the history of oral historymakes it possible for today's oral historians to have a productivedialogue with their predecessors in the field. 相似文献
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本文在对琉璃河西周燕国墓地玉器进行考古学研究的基础上,结合文献,对西周燕国玉器的使用制度进行了分析考证,认为燕国在西周早期,以组玉佩和葬玉为代表的与礼制相符的用玉制度已见端倪,在中国玉器发展史上占有重要地位。 相似文献