首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 31 毫秒
1.
The author, an expert in Central Asian toponymy, culture, and physical geography, examines major trends in research on the Aral region's geography by focusing on major themes of paleogeography, bottom and shoreline morphology, hydroclimatic conditions, migration of salts, and forecasting negative impacts of hydrological engineering projects on the region's environment. In the process he presents much interesting material on the early history of the sea and its hinterland (most notably, the deltas of the Syr Dar'ya and Amu Dar'ya) and about differences in the interpretation of quantitative information about the sea by scholars at different times and using different methodologies.  相似文献   

2.
The Sarykamysh depression of Soviet Central Asia, southwest of the Aral Sea, has begun to fill with water since around 1960 after having lain dry for 350 years. As of 1976, the lake, fed mainly by irrigation drainage water from the nearby Khorezm (Khiva) oasis, had grown to 2,000 km2, with a depth of at least 40 m. The depression was receiving 4 to 4.5 km3 of water a year and continued to fill. While the appearance of such a large body of water in the desert would appear in itself to be a positive development, the question is raised whether the water would not be put to better use by being directed toward the Aral Sea.  相似文献   

3.
A specialist in loess geomorphology and arid-zone hydrology distinguishes three categories of factors accounting for waterlevel changes in the Aral Sea. She judges the most significant to be changes in inflow resulting from changes in the course of the Amudarya, the more important of the two tributary streams. The Amudarya at various times emptied into the Sarykamysh depression, southwest of the Aral Sea, giving rise to a flow of water through the now dry Uzboy channel to the Caspian Sea. Climatic change, involving alternations of wet and dry cycles, is said to have accounted for only minor water level fluctuations, of the order of 4 to 6 m, against the background of the major fluctuations produced by the Amudarya course migrations. Human activity, notably irrigation, is regarded as having become significant only in modern times as a result of an expansion of irrigation works. The present abrupt decline in the Aral waterlevel (6 m from 1960 to 1977, including 2 m in the last three years) is attributed to the combination of a dry climatic cycle and greatly increased use of water for irrigation.  相似文献   

4.
An analysis of evaporation changes in the Central Asian plain in connection with the drop of the Aral Sea level beginning in 1961 shows that there has been a reduction in evaporation from stream valleys and deltas and an increase in evaporation from irrigated land and newly formed evaporating surfaces. These new entities are primarily the Arnasay depression (west of the Golodnaya Steppe irrigation district) and the Sarykamysh depression (west of the lower reaches of the Amudarya), which have become filled with spent irrigation water draining from the irrigated land. Another new source of evaporation associated with human activity are the lakes and wetlands formed along the Kara Kum Canal as a result of the filtration of canal water. It turns out, furthermore, that irrigation on sloping piedomon plains, such as those watered by the Kara Kum Canal, requires more water than in old irrigated alluvial plains because of the additional water needed to flush salt out of the soil and to fill subsoil cavities and raise the watertable.  相似文献   

5.
An authoritative U.S. analyst of Central Asian water management problems, and former advisor to the Uzbek government on water management issues, surveys the nature and effectiveness of international and regional programs to mitigate the Aral Sea crisis. After first reviewing the history and magnitude of the crisis, the author assesses international and regional assistance programs during the late Soviet period and subsequent initial years of independence for the Central Asian republics within the Aral Basin. A concluding section includes policy recommendations based on the author's extensive experience in the field and familiarity with many of the principal organizations involved. Journal of Economic Literature, Classification Numbers: F35, Q15, Q25. 2 figures, 1 table, 32 references.  相似文献   

6.
An analysis of water-balance components over the 45-year period 1926–1970 seeks to establish their relative significance in the marked decline of the Aral Sea level since 1961. Long-term fluctuations in the sea level are found to reflect both natural fluctuations in the water resources available to the drainage basin and the steady growth of human activity in the watershed area. An increase in water withdrawals for irrigation in the 1950s did not appreciably affect the Aral Sea level because of generally large water resources during those years. The intensive decline of the water level since 1961 is attributed mainly to a growth of consumptive withdrawals from the Syrdarya and Amudarya, the two main tributaries of the Aral Sea. The position of the sea level also depends on the annual fluctuations of evaporation from the sea surface, which tends to be more variable than the annual streamflow to the sea. The subsurface component of Aral Sea inflow, contrary to previous studies, is found to be a negligible factor.  相似文献   

7.
A group of rectangular and circular enclosures in southwest Kazakhstan, originally thought to be prehistoric or early historical, has turned out to date from the 1950s and 1960s. They were built as livestock pens (kora) to protect rice paddies from free-grazing cattle. Rice cultivation had been introduced to the region east of the Aral Sea by deported ethnic Koreans from the Soviet Far East after the native pastoral nomadism had been destroyed by forced collectivisation in the early 1930s. This had resulted in the Great Famine of 1931–33, evidence for which is provided by refugees’ burials found on archaeological sites in Kazakhstan and Uzbekistan. The case study illustrates an approach to the study of twentieth century contested landscapes using evidence from archaeology, ethnography, and oral history.  相似文献   

8.
An advocate of the diversion of Siberian water to Central Asia presents the latest thinking on such a project and recommends a combination of the diversion of water from the upper Ob' for irrigation of Northern Kazakhstan and the diversion of water from a small lower Ob' reservoir southward across the Turgay divide into the Aral Sea basin.  相似文献   

9.
An American geographer and noted international authority on water management problems in Russia and Central Asia presents an account of an expedition, in late 2005 (under the sponsorship of the National Geographic Society) to Kazakhstan and Uzbekistan, focused on the Aral Sea. The steadily drying inland sea, with a surface area of 67,500 km2 in 1960, had split into two parts and shrunk to 17,380 km2 in 2006. The paper provides an up-to-date overview of the crisis and presents an optimistic scenario of the sea's future, noting development of economic activities (particularly fisheries) in its surrounding settlements. Journal of Economic Literature, Classification Numbers: O13, Q15, Q25. 6 figures, 1 table, 55 references.  相似文献   

10.
This brief comment offers some reflections on John Tresch's “Compositor's Reversal.” Contrasting his approach with Gaston Bachelard's, I situate Tresch in the tradition of reading Edgar A. Poe's Narrative of Arthur Gordon Pym as a riddle to be decoded. I suggest that Tresch's analytical emphasis on material composition practices rather than Pym's content opens up insightful ways of reading both Pym itself in terms of its composition, style, and narrative voice, and also Poe's well‐known programmatic Philosophy of Composition. The key achievement of Tresch's article beyond its engagement with Poe scholarship is its contribution to the study of writing practices and media studies more broadly. By demonstrating the tight connection Poe forged between natural theology and the material practice of typography, Tresch inserts the typesetting process as an important step in the historiographical trajectory between pen and typewriter. He shows that the mid‐nineteenth‐century context of natural theology marks a decisive difference in connotation between Poe's compositional play with questions of authorship and plausibility, of truth and appearance both described in and performed by his narrative, and later concerns with the apparatus and its potential for the production of an écriture automatique.  相似文献   

11.
This article enquires into the relation between enlightened humanist conceptions of natural law and the period novel's fictionalization of the English gentleman in the context of its marriage plot. Marriage played a key role in enlightened theorisations of natural law precisely as an institution capable of grounding familial and civil life in an emerging concept of human nature. Yet public debate about the state's role in the regulation of marriage in mid-eighteenth-century England demonstrates that natural law lent itself to very different models of sovereignty and governance. The antinomies that characterized natural law's circulation in the English context are uniquely fictionalized in Samuel Richardson's last novel, Sir Charles Grandison (1753–54), a lengthy parallel narrative of failed courtship and matrimonial felicity that draws upon Pufendorf's model of natural law, yet is only partly implicated in its secular humanism. The novel's eponymous gentleman hero – a ‘Man of Religion and Virtue’ exemplifies a mix of Anglican piety, civic virtue and disinterested sympathy that is sanctioned by natural law and sealed by the English marriage plot.  相似文献   

12.
Summary

This article looks at the discussions of natural law by the eighteenth-century French materialists Julien Offray de La Mettre, Denis Diderot, Paul Thiry d'Holbach and Claude-Adrien Helvétius. It is particularly concerned with their discussion of moral values and their attempt to find a materialistic basis for them as part of their rejection of religion. The discussion brings out the différences between them and analyses their dialogues on this question, including the other materialists' rejection of La Mettrie's amoralism, which threatened to undermine their attempt to found a natural law taught by experience and based on human nature. Particular attention is paid to Diderot's many writings which grapple with the subject, beginning with his Encyclopédie article droit naturel, probably written in 1754. He discussed the question in many of his later writings, including in his annotations on the works of Helvétius, who based natural law on the general interest. These writings reveal a tension between Diderot's emphasis on the search for individual happiness and the interests of society as he, together with d'Holbach, attempted to provide a natural basis for morality and government from which to criticise existing institutions.  相似文献   

13.
An early 1949 version of Davydov's grandiose scheme for diverting water from the Yenisey and Ob' Rivers to Kazakhstan and Central Asia via the Turgay Gates and the Aral and Caspian Seas in order to stabilize the level of the Caspian, expand the irrigated acreage of Kazakhstan and Central Asia, generate abundant hydro-electric power, provide a cheap water transport route between Siberia and Central Asia, eliminate sukhovei (dry winds) at their source, and ameliorate the continental climate of Western Siberia, Kazakhstan, and Central Asia. The plan reflects the anthropocentric “transformation of nature” and the large-scale “great projects of communism” drives of the late Stalinist period. The translation was prepared by James R. Gibson of York University, Toronto.  相似文献   

14.
In this essay, I will discuss Murphy's exploration of the (un)bearable nature of an existence characterised by loss, and by longing, in his recent play sequence Alice Trilogy (2005). Positing the explicitly dualised characterisation in the first and third of these plays as a reflection of, and natural progression from, earlier dramaturgic representations of duality, I will examine Murphy's overt rendering of subjectivity, in Alice Trilogy, focusing upon the ways in which such theatrical duality explicates the silences which pervade the Purgatorial affective no-man's-land – or ‘in-betweenness’ – of mind, body, and soul.  相似文献   

15.
As the amount of agricultural lands has increased over the years in Uzbekistan, problems associated with the impacts of irrigation water use have occurred. The most serious and widespread of the effects may be the secondary salinization of soils. Serious salinization problems along the lower courses of the Syr Dar'ya and Amu Dar'ya basins are a contrast to milder problems along their upper courses. This paper illustrates the extent of the soil salinization problem in Uzbekistan, identifies key problem areas, and demonstrates the need for an adequate response.  相似文献   

16.
Summary

This article studies the impact of the debate about human sociability on the crisis of natural law in the later eighteenth century examining the Untersuchungen über den Stand der Natur of 1780 by the Göttingen scholar Michael Hissmann. It makes the case that this crisis ensued from Rousseau's Discours sur linégalité and a revival of neo-Epicurean trends in moral philosophy more generally. The sociability debate revolved around the question to what extent society was natural or artificial to man. This had important implications for the problem of whether distinctions between right and wrong or just and unjust were natural and inborn, or had developed at a much later stage of mankind's history, reflecting merely the respective needs and utility of different societies and cultures. Hissmann's essay summarises this European debate concisely. His point of departure is Rousseauian premises, yet his political conclusions turn Rousseau upside down. Here, Hissmann's essay opens up several questions regarding the allegedly radical political character of one-substance theories in philosophy.  相似文献   

17.
The existence of gendered knowledge has been identified as a significant feature of Indigenous Australian culture, and the importance of considering the implications of gendered environmental knowledge in collaborative cross-cultural natural resource management has been highlighted. There is a lack of case studies that demonstrate how Indigenous women's knowledge and laws can be provided for in resource management contexts. From collaborative research with Anmatyerr women in central Australia, we discuss the implications of gender bias in relation to gendered knowledge in natural and cultural resource management, with a specific focus on Anmatyerr women's involvement in providing inputs about the cultural values of water within water allocation planning processes. This research highlights Anmatyerr women's own perspectives of their roles in contemporary contexts and identifies the existence of cultural change and continuity in relation to rights and responsibilities around water.  相似文献   

18.
A geomorphic field survey conducted in the late 1960's by the Institute of Geography (Moscow) suggests the existence of only one geomorphic level (Level III) that can be traced all the way through the Turgay trough from the Irtysh River drainage basin to the Aral Sea depression. However, contrary to general assumption, geomorphic analysis does not confirm the view that the Turgay trough served for a throughflow of water between the two drainage basins during the Pleistocene. An analysis of the geomorphic levels in the trough suggests that water in the northern segment of the trough drained toward the north and in the southern segment toward the south, with a middle segment occupied by a system of lakes, still evident to this day. However, the absence of a throughflow in the past does not rule out the use of the trough for the proposed southward diversion of Siberian water. It is suggested that the level of water on the Siberian slope be raised to the elevation of the divide (about 125 meters above sea level) so that the water could then follow the natural slope of the Level III surface toward the south.  相似文献   

19.
In 1766 Jean-Jacques Rousseau, in exile from France and Switzerland, came to England, where he made the acquaintance of Margaret Cavendish Harley Bentinck, Duchess of Portland. The two began to botanise together and to exchange letters about botany. These letters contain salient statements about Rousseau's views on natural theology, gardens, botanical texts and exotic botany. This exchange entailed not only discussions about plant identifications and other botanical matters, but most important, reciprocal gifts of books and specimens in the manner of gentlemanly scientific correspondence of the period. Rousseau volunteered his services as the Duchess's ‘herborist’ or plant collector, and collected specimens and seeds in her behalf; these were destined for her own extensive herbaria and other natural history collections. Rousseau, who elsewhere denied female talent for science, admired the Duchess's knowledge of natural history, acknowledging his own as inferior. Their correspondence ended when the Duchess sent him the Herbarium amboinense of Georg Rumpf (Rumphius), an important work of exotic botany. Rousseau considered exotic botany to be the antithesis of the domination-free nature from which he derived solace and inspiration.  相似文献   

20.
Adult discourses often represent relationships between children and animals as beneficial for children's psycho-social development or as reflecting a ‘natural’ connection between children and animals. In contrast, this paper draws on recent work in sociology and geography where human–animal relationships are seen as socially situated and where conventional constructions of the human–animal boundary are questioned. Focussing on children's own perspectives on their connections with animals, it is argued that these relationships can also be understood within the social and relational context of children's lives. It is argued that this ‘relational’ orientation to children's relationships with animals might significantly enhance our understanding of children's lives and also open up ways of thinking about the place of animals in children's (and adults') social lives.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号