NUMERICAL CLASSIFICATION OF REGIONAL STRUCTURE OF AGRO-ECOSYSTEM IN GUANGDONG

On the basis of "The Statistical Data of Guangdong Province in 1981" and the 14 selected original variables, 107 counties and suburbs in Guangdong are classified. In the classification, cluster analysis is applied, and the cluster hierarchy of the agro-ecosystem is achieved with a computer. According to output level, planting structure, and input level of energy, there is an evident regionalism in the agro-ecosystem of Guangdong, which presents approximately concentric circles centralized by Guangzhou City.     

四川森林的地域分异特点

四川的地形主要是山地,因而四川森林属山地类型,其中以松Pinaceae林和栎Fa-gaceae林为主。松林和栎林在四川森林中具有代表性。在地理分布上四川森林的地域分异极为明显。根据森林的地域分异特点,将四川林区划分为9个森林分布区。     

BOOK REVIEWS

Book Reviewed in this article: Unfairly Structured Cities . Blair Badcock Religion and Rural Revolt . Janos M. Bak and Gerhard Benecke The Industrial Geography of Canada . Anthony Blackbourn and Robert G. Putnam The Cuban-American Experience, Culture, Images, and Perspectives. Thomas D. Boswell and James R. Curtis Quaternary Paleoclimatology . R. S. Bradley Development and Crisis in Brazil, 1930–1983 . Luiz Bresser Pereiras Centres of Origin in Biogeography . John C. Briggs Analytical Urban Geography . Martin Cadwallader Geomorphology . Richard J. Chorley , Stanley A. Schumm, and David E. Sugden South Africa: The Impact of Past Geographies . A. J. Christopher The Geography of Underdevelopment. A Critical Survey . D. K. Forbes Health Care in Developing Countries . Wilbert M. Gesler Place to Grow Old: The Meaning of Environment in Old Age . Stephen M. Golant The Emerging Marine Economy of the Pacific . Chennat Gopalakrishnan An Introduction to Agricultural Geography . David B. Grigg The Soviet Union: A Geographical Study . G. Melvyn Howe Geographical Aspects of Health: Essays in Honour of Andrew Learmonth . N. D. Mc Glashan and J. R. Blunden Physical Geography: A Landscape Appreciation . Tom L. Mc Knight Mountain Experience. The Psychology and Sociology of Adventure. Richard G. Mitchell Jr . Systematic and Regional Biogeography. Stanley A. Morain The Economic Transformation of American Cities. T. J. Noyelle and T. M. Stanback , Jr . Normal Accidents: Living With High-Risk Technologies. Charles Perrow Vanishing Farmland: A Legal Solution for the States. Sarah E. Redfield Applied Methods of Regional Analysis: The Spatial Dimensions of Development Policy. Dennis A. Rondinelli Urbanization in Romania. A Geography of Social and Economic Change Since Independence. Per Ronnas Statistical Techniques in Geographical Analysis. Gareth Shaw and Dennis Wheeler The Granite Garden: Urban Nature and Human Design. Anne Whiston Spirn Political Geography: Recent Advances and Future Directions. Peter Taylor and John House Geographia y Medio Ambiente. Manuel Valenzuela -Rubío Nãgara and Commandery: Origins of the Southeast Asian Urban Traditions. Paul Wheatley The Common Fisheries Policy of the European Community. Mark Wise Geography and Gender. Women and Geography Study Group of the IBG Technological Hazards. D. J. Zeigler , J. H. Johnson , S. D. Brunn     

共和6.9级地震震前形变异常

本文介绍了共和地震后所测到的源兆型大地形变异常,讨论了异常出现的时间、空间及异常与区域构造应力场的关系。指出形变测量手段有能力捕捉到此种地震前兆信息。     

DIFASTERS AND REGIONAL RISKS OF DEBRIS FLOW IN ZHAOTONG PREFECTURE，YUNNAN PROVINCE，CHINA

（刘希林）ＤＩＦＡＳＴＥＲＳＡＮＤＲＥＧＩＯＮＡＬＲＩＳＫＳＯＦＤＥＢＲＩＳＦＬＯＷＩＮＺＨＡＯＴＯＮＧＰＲＥＦＥＣＴＵＲＥ，ＹＵＮＮＡＮＰＲＯＶＩＮＣＥ，ＣＨＩＮＡ￥ＬｉｕＸｉｌｉｎ（ＩｎｓｔｉｔｕｔｅｏｆＭｏｕｎｔａｉｎＤｉｓａｓｔｅｒａｎｄＥｎ...     

REGIONAL WATER MANAGEMENT: AN ASSESSMENT OF INSTITUTIONS IN ENGLAND AND WALES1

Water management institutions vary in comprehensiveness, level of governmental intervention, and basis of geographic delimitation. In 1973 the British Parliament created ten integrated water authorities in England and Wales based on river basins. They are responsible for all aspects of the water industry and are virtually the sole providers of water services. In 1983 Parliament reorganized the governing boards of the authorities along corporate lines. Evaluation of the British institutional arrangement and performance suggests that the comprehensive regional water authorities facilitate efficiency, effectiveness, and adequate technology, but that they limit representation of legitimate local and public interests and poorly accommodate existing governmental units.     

新疆东部地区大地构造问题探讨

根据最新的航磁资料,主要探讨了新疆东部基底性质及岩相分区,指出在天山地区除普通存在古生界浅变质基底外,于吐鲁番—哈密盆地中南部深层还存在强磁性基底.库鲁克塔格地区由于元古界多为弱磁性或无磁性岩石,因而显示负磁场面貌,该区与南天山、塔里木盆地北部为区域负背景异常,推测它们为同一深部因素控制的构造区.磁场资料可清楚地圈定出塔里木地台东部边界.文中还对原中天山隆起带出现的升高变化异常提出了解释依据.     

1981-2015年中国95°E以东区域性暴雨过程时、空分布特征

基于1981-2015年中国逐日降水量加密观测资料和NCEP/NCAR再分析资料,采用主、客观相结合的方法,以天气过程为单元建立了中国95°E以东地区及其6个子区的区域性暴雨过程个例谱,进一步使用小波功率谱、9点二项式平滑及离差平方和聚类等方法剖析了中国95°E以东区域性暴雨过程的时、空分布统计特征。结果表明:（1）中国95°E以东区域性暴雨过程平均年总次数接近30次;其中,江淮流域是出现区域性暴雨过程最多的子区,平均为19次/a;其次为华南和西南地区东部,平均为10.5和5.8次/a;东北地区、华北和西北地区东部平均仅为1-3次/a。（2）中国95°E以东及各子区区域性暴雨过程次数的年及年代际变化主要表现为波动特征,各子区中江淮流域与中国95°E以东地区的年及年代际波动变化最为一致;华南与西南地区、东北地区与华北的波动变化互为显著的正相关。中国95°E以东及各子区区域性暴雨过程年总次数都表现出2-4 a的周期变化,此外,江淮流域、华南和西北地区东部还表现出6-10 a的周期变化,华北表现出13-17 a的周期变化。（3）中国95°E以东区域性暴雨过程总体呈夏季最多、冬季最少、春季多于秋季的分布特征,其中以7月出现次数最多。各子区中,江淮流域和西南地区东部区域性暴雨过程以6、7月最多,华南以5、6月最多;东北地区、华北、西北地区东部集中出现在7、8月。（4）中国95°E以东地区的极端区域性暴雨过程可划分为7种分布类型。第Ⅰ-Ⅳ型强降雨区从江南南部和华南呈阶梯状逐步北抬至黄淮和四川盆地东部一带,第Ⅴ-Ⅶ型除在东南沿海均有强降雨区外,第Ⅴ型在华南东部至江淮、第Ⅵ型在黄淮北部至东北地区中南部、第Ⅶ型在黄淮西部和华北中南部还分布有强降雨区。