51 年来珠江流域输沙量的变化

根据1955~2005 年珠江流域主要水文站的径流量和输沙量数据以及流域降水量数据, 对珠江流域输沙量的变化进行了研究, 结果发现: (1) 石角站(北江)、博罗站(东江)、迁江站 (红水河) 以及高要站(西江干流) 输沙量呈下降趋势, 而柳州站(柳江)、南宁站(郁江) 的输沙量则呈上升趋势。(2) 1955~2005 年珠江入海泥沙(石角站、博罗站、高要站输沙量之和) 均 值为7529×10⁴ t/yr, 并在总体上也呈下降趋势。珠江入海泥沙还存在着年际变化上的波动性和阶段性特征, 即从1950 年代到1980 年代呈显著的上升趋势, 而此后呈显著下降趋势。通过分析认为: (1) 气候变化是造成珠江流域输沙量年际波动性变化的主要因素, 但不是造成珠江入海泥沙下降的主要影响因素; (2) 珠江流域入海泥沙的阶段性变化特征与水土流失和水土保持相关; (3) 水库建设是造成1955~2005 年珠江流域入海泥沙减少的主要因素。(4) 珠江流域入海泥沙将可能进一步减少, 这将对未来珠江河口环境和三角洲的演变产生影响, 加强进一步的研究非常必要。     

巩乃斯避暑旅游气象指数分析与评价

根据巩乃斯、和静站2009—2018年6—8月的逐日平均气温、最高气温、相对湿度、风速等气象观测资料,采用对比分析、通径分析及模糊综合评价等方法对巩乃斯地区夏季避暑旅游气象资源优势进行分析和评价.结果表明:巩乃斯夏季气候凉爽、湿度适宜、风速不大,人体感觉凉爽、舒适,适合避暑旅行.人体舒适度与空气温度呈显著正相关,与相对...     

微囊藻毒素对人类健康影响相关研究的回顾

本文回顾了微囊藻毒素(MC,一种最常见而重要的蓝藻毒素)对人类健康影响相关的研究,迄今为止的一些重要历史事件包括:(1)1990年,科学家首次发现,MC进入肝细胞后,能强烈地抑制蛋白磷酸酶(PP1、PP2A)的活性,这是MC致毒的最重要的分子基础;(2)1996年,在巴西发生了肾透析用水被MC(-LR、-YR和-AR)污染导致52人死亡的严重事件;(3)中国南方原发性肝癌的高发病率被认为与饮水中的MC污染有关;(4)1998年,世界卫生组织提出了饮用水中MC-LR含量的临时指导值为1μg/L;(5)从巢湖的专业渔民血液中检测出MCs,并发现长期的低剂量慢性暴露引起了一定程度的肝损伤,微囊藻毒素对人类健康的影响证据确凿,不容忽视,尤其是在富营养化越演越烈、有毒蓝藻水华肆虐的今天.     

绿洲演变及其调控因素初析

绿洲是荒漠区适宜多种生物共同生息繁衍的地域。它通过人为干扰、气候波动和构造活动等因素的变化调控而发生演变。构造活动对绿洲演变的影响具有空间差异性和时间滞后性;气候波动则表现为区域相对一致性, 随时间发展的渐变性和过程的复杂性;人为干扰无论是空间上还是时段上都有很强的局限性, 但其发展迅速和时空不稳定性(社会原因)成为影响绿洲演变的调控因素, 同时也是人工干预绿洲演变, 实施永序管理的重要途径。     

气候波动和人类活动对南水北调中线工程典型流域径流影响的定量评估

以南水北调中线工程典型流域汉江上游流域和滦河流域为研究对象,采用敏感性分析法、降水?径流双累积曲线法、累积量斜率变化率比较法定量评估了气候波动和人类活动对流域径流变化的影响。结果表明：汉江上游流域和滦河流域变异Ⅰ/Ⅱ期年均径流深相对于基准期分别减少了29.5% / 19.1%和49.8% / 70.0%;对于汉江上游流域,1991-1999年（变异Ⅰ期）气候波动是径流减少的主要影响因素,2000-2008年（变异Ⅱ期）人类活动则是径流减少的主要影响因素,且人类活动对汉江上游流域径流减少的影响逐步增加;对于滦河流域,1980-2010年（变异Ⅰ/Ⅱ期）人类活动一直是径流减少的主要影响因素,且气候波动和人类活动对径流减少的影响贡献率基本保持不变。     

Editorial Notes and News

Abstract

Thubten Jigme Norbu. Tibet Is My Country. As told to Heinrich Harrer; translated from the German by Edward Fitzgerald. E. P. Dutton &; Co., 300 Park Avenue South, New York 10, N.Y., 1961. 264 pages with color illustrations. $5.00.

Miriam Schlein. The Sun, The Wind, The Sea and The Rain. Abelard-Schuman Limited, 6 West 57 Street, New York 19, N.Y., 1960. 38 pages with illustrations by Joe Lasker. $2.75.

Robert L. Pendleton with the assistance of Robert C. Kingsbury and others. Thailand: Aspects of Landscape and Life. An American Geographical Society Handbook. Duell, Sloan and Pearce, 60 East 42nd Street, New York 17, N.Y., 1962. xv and 321 pages with table of contents, photographs, maps, charts and index. $10.00.

Stuart R. Tomkins. Life in America: Alaska. Revised edition. The Fideler Company, Grand Rapids 2, Michigan, 1961. 128 pages with table of contents, photographs, glossary and index. $2.48.

Harry C. Rubicam, Jr. Men at Work in the Great Plains States. G. P. Putnam's Sons, 200 Madison Avenue, New York 16, N.Y., 1961. 123 pages with table of contents, photographs, notes and index. $3.00.

Winifred Hammond. Rice: Food for a Hungry World. Coward-McCann, Inc., 210 Madison Ave., New York 16, N.Y., 1961. 160 pages with table of contents, references, maps, photographic illustrations and index. $3.50.

John C. and Elsie F. Caldwell. Our Neighbors in the Philippines. The John Day Company, Inc., 200 Madison Avenue, New York 16, N.Y., 1961. 45 pages with table of contents, photographs and illustrations by Heidi Ogawa. 12.00.

Sidney H. Gould, editor. Sciences in Communist China. (Pub. No. 68) American Association for the Advancement of Science, Washington, D.C., 1961. 872 pages with table of contents, tables and author, geographical and subject indexes. $14.00.

Gilbert F. White, editor. Papers on Flood Problems. Research Paper No. 70. Department of Geography, Rosenwald Hall, University of Chicago, Chicago 37, Illinois, 1961. 228 pages with illustrations. $4.00.

D. D. Harris and D. A. M. Lea. A Regional Geography of South Australia. Whitcombe and Tombs Pty., Ltd., 20 Bond Street, Melbourne, C. 1, Australia, 1961. 168 pages with table of contents, maps, diagrams and index. About $2.75.

Richard M. Highsmith, Jr., editor, and Jon M. Leverenz, cartographer. Altas of the Pacific Northwest: Resources and Development, 3rd edition. Oregon State University Press, Corvallis, Oregon, 1962. 168 pages with table of contents, photographs, tables, plates and index. $5.00.

Wiliam Lytle Schurz. Brazil, The Infinite Country. E. P. Dutton &; Co., 300 Park Avenue South, New York 10, N.Y., 1961. 316 pages with table of contents, maps, supplementary reading list and index. $6.00.

Umberto Nobile. My Polar Flights. G. P. Putnam's Sons, 200 Madison Avenue, New York 16, N.Y., 1961. 288 pages with table of contents, illustrations, appendix and index. $4.50.

Robert Engler. The Politics of Oil: A Study of Private Power and Democratic Directions. The Macmillan Company, 60 Fifth Avenue, New York 11, N.Y., 1961. viii and 565 pages with table of contents, notes and index. $7.50.

Edwin Thompson Denig. Five Indian Tribes of the Upper Missouri: Sioux, Arickaras, Assiniboines, Crees, Crows. (Edited and with introduction by John C. Ewers.) University of Oklahoma Press, Norman, Oklahoma, 1961. 217 pages with 12 illustrations, 1 map, editor's bibliography and index. $4.00.

J. P. Cole and F. C. German. A Geography of the USSR: The Background to a Planned Economy. Butterworth Inc., 7235 Wisconsin Avenue, Washington 14, D.C., 1961. x and 290 pages with table of contents, appendixes, notes, glossary, bibliography and index. $8.50.

Jane and Paul Annixter. Horns of Plenty. Holiday House, 8 West 13th St., New York 11, N.Y., 1960. 203 pages. $2.95.

Richard J. Ward and Lawrence A. Hoffman, editors. Readings in Economic Geography from Fortune. Henry Holt and Company, 383 Madison Avenue, New York 17, N.Y., 1960. 130 pages with table of contents, maps and graphs. $1.50

Helen Wolff Vogel and Mary Leonard Caruso. Ocean Harvest: The Future of Oceanography. Alfred A. Knopf, 501 Madison Avenue, New York 22, N.Y., 1961. 14 pages with illustrations by John Kaufman. $3.00.

The New Rand McNally Pocket World Atlas. Cardinal Edition. Pocket Books, Inc., 630 Fifth Avenue, New York 20, N.Y., 1961. 295 pages with table of contents, maps covering 169 pages and index. 75 cents.

Lowdon Wingo, Jr., Transportation and Urban Land. Resources for the Future, Inc., 1775 Massachusetts Avenue, N.W., Washington 6, D.C., 1961. 132 pages with table of contents, figures and appendices. $2.00.

Paul Fenimore Cooper. Island of the Lost. G. P. Putnam's Sons, 200 Madison Avenue, New York 16, N.Y., 1961. 256 pages with table of contents, map of King William Island and selected bibliography. $4.00.

Rhoads Murphey. An Introduction to Geography. Rand McNally and Company, P.O. Box 7600, Chicago 80, Illinois, 1961. 699 pages with table of contents, illustrations, chapter-end bibliographies, questions for further study, statistical appendix and index. $7.75.

Jordan A. Hodgkins. Soviet Power: Energy Resources, Production and Potentials. Prentice-Hall, Inc., Englewood Cliffs, New Jersey, 1961. 190 pages with table of contents, maps, tables and 34 pages of appendix tables. $5.25.

Andrew A. Freeman. The Case for Doctor Cook. Coward-McCann, Inc., 210 Madison Avenue, New York, N.Y., 1961. 315 pages with table of contents, sources, notes and acknowledgments and index. $5.75.

Frances H. Kohan and Truda T. Weil. Juan's Adventures in Mexico. Noble and Noble, Publishers, Inc., 67 Irving Place, New York 3, N.Y., 1961. 183 pages with table of contents, chapter study helps, illustrations and suggested reading list. $3.00.     

不同等级城市的农民工人力资本增长差异及影响因素——基于河北省清苑县的调查分析

农民工外出务工动机正由"生存型"向"发展型"转变,人力资本成为影响其城市融入的重要因素。通过对河北省清苑县的分层随机抽样调查,运用数理统计和对比分析法研究外出农民工的人力资本增长及其作用机理。结果表明:相对于进入全国中心城市和其他中小城市的农民工群体,区域中心城市的农民工技能增长的比例最高。在人力资本增长途径上,非正式学习途径效果突出,正式培训对人力资本增长的效果以区域中心城市最为显著,不仅进入该类城市的农民工能够获得更多的正式培训机会,而且企业对员工的培训频次及培训专业化程度均较另两类城市高。非正式学习受农民工学习主动性的影响,Logistic回归显示企业培训频次对技能提升主动性发挥正向作用且效果最强,而地方文化设施环境与农民工技能提升的主动性呈现负相关,全国性中心城市尤为明显。     

GIS APPLICATION IN RESEARCH OF WILDLIFE HABITAT CHANGE——A case study of the Giant Panda in Wolong Nature Reserve

Ｉ.ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅＧｉａｎｔＰａｎｄａ(Ａｉｌｕｒｏｐｏｄａｍｅｌａｎｏｌｅｕｅａ)ｉｓａｎｅｎｄａｎｇｅｒｅｄａｎｉｍａｌｓｐｅｃｉｅｓｉｎｔｈｅｗｏｒｌｄ.Ｔｈｅｒｅａｒｅａｂｏｕｔ1000ｉｎｄｉｖｉｄｕａｌｓｌｅｆｔａｎｄｃｏｎｆｉｎｅｄｉｎｔｈｅｉｓｏｌａｔｅｄｍｏｕｎｔａｉｎａｒｅａｓｉｎｔｈｅｓｏｕｔｈｗｅｓｔｅｒｎｐａｒｔｏｆＣｈｉｎａ.Ｉｔｓｒｅｍａｉｎｉｎｇｈａｂｉｔａｔｃｏｖｅｒｓａｂｏｕｔ29,500ｋｍ2[2,6,11].Ｈｕｍａｎｅｎｃｒｏａｃｈｍｅｎｔｉｓｃｏｎｓｉｄｅｒｅ…     

BOOK REVIEWS

Books reviewed in this article: The Mexican Colonial Copper Industry. Elinore M. Barrett . The Control Revolution: Technological and Economic Origins of the Information Society . James R. Beniger . Land Degradation and Society . Piers M. Blaikie And Harold C. Brookfield , Eds . La carte, mode d'emploi. Roger Brunet . France: les dynamiques du territoire . Roger Brunet AND Jacques Sallois , EDS. At the Crossroads—The Mineral Problems of the United States . Eugene N. Cameron . A Census of One Billion People , Papers for International Seminar on China's 1982 Population Census. Li Chengrui , ED. Les Milieux “Naturels” du Globe . Jean Demangeot . The Geophysiology of Amazonia: Vegetation and Climate Interactions : Robert E. Dickinson , ED. Tenn-Tom Country . James F. Doster And David C. Weaver . Family Farming in Europe and America . Boguslaw Galeski And Eugene Wilkening , EDS. The Geography of Urban Transportation . Susan Hanson , Ed. Combating Desertification in Developing Countries . J. K. Jain , ED. Cartography in France—1660–1848. Science, Engineering and Statecraft . Josef W. Konvitz . Distribution of Distances in Pregeographical Space . Hans Kuiper . Physical Geography Lab Manual: A New Experimental Approach . Neal G. Lineback And John M. Harlin . Physical Geography: A Landscape Appreciation , 2nd ed. Tom L. Mc Knight . The Desert Is No Lady: Southwestern Landscapes in Women's Writing and Art . Vera Norwood And Janice Monk , EDS. France: A Geographical, Social, and Economic Survey . Philippe Pinchemel , translated, by D. Elkins and T. H. Elkins. Gene Banks and the World's Food . Donald L. Plucknett , Nigel J. H. Smith , J. T. Williams , And N. Murthi Anishetty . Latin American Development: Geographical Perspectives . David Preston , Ed. Making Sense of Development: An Introduction to Classical and Contemporary Theories of Development and Their Application to Southeast Asia . P. W. Preston . The History of the Countryside. Oliver Rackham . The Third World in Perspective . H. A. Reitsma AND J. M. G. Kleinpenning . The Industrial Geography of Australia . David C. Rich . The Recruiting Game , 2nd Ed., revised. John F. Rooney , JR. A Cultural Geography of North American Indians . Thomas E. Ross AND Tyrel G. Moore , EDS. Eastern Europe . Dean S. Rugg . Human Territoriality: Its Theory and History . Cambridge Studies in Historical Geography: 7. Robert David Sack . Experimental Fluvial Geomorphology . Stanley A. Schumm , M. Paul Mosley , AND William E. Weaver . The New Urban Landscape . David Schuyler . Atlas of American Women . Barbara Gimla Shortridge . Impacts of Hazardous Technology: The Psycho-Social Effects of Restarting TMI-1 . John Sorensen , Jon Soderstrom , Emily Copenhaver , Sam Carnes AND Robert Bolin . Modern Physical Geography , 3rd Ed., (Third Edition). Arthur N. Strahler AND Alan H. Strahler . India: Economic Resource Base and Contemporary Political Patterns . B. L. Sukhwal .     

吉林省桦甸市人类活动诱发地质灾害现状及防治措施

桦甸市是吉林省重要的矿业、水利、交通发达地区与枢纽之一,长期的人类活动,诱发了山体崩塌、滑坡、地面塌陷等地质灾害。本文在调查编制《桦甸市地质灾害防治"十二五"规划》基础上,针对人类活动诱发地质灾害的现状及防治措施提出粗浅看法。