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A STUDY ON EQUILIBrIUM COASTAL prOFILES OF THE CLOSE TIDAL FLAT—A Case Study of Fengxian Tidal Flat

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Chinese Geographical Science 2002年第1期12卷 55-60页

作者： LI Heng peng, YANG Gui shan(Nanjing Institute of Geography and Limnology, the Chinese Academy of Sciences, Nanjing 210008, p.r. china) Nanjing Institute of Geography and Limnology the Chinese Academy of Sciences Nanjing 210008

The article analyses the temp.r.l spatial changes of profiles by EOF (Emp.r.cal Orthogonal Function) analysis and DTM analysis of GIS. These profiles, which are not affected by engineering, are chosen from the coast with successive field monitoring data from 1990 to 1999. Temp.r.l and spatial EOF indicates the obvious stability of coast profile p.r.meters in Fengxian tidal flat. In spatial scale, high tidal flats and deep water terraces are in a balance state while upp.r.clino with steep slopes are sensitive and the stability is easy to be destroyed. In temp.r.l scale, the erosion and deposition in this area are kept in balance in a whole. There are almost no change below 8- 9.5m. At the same time, it is the lower limit of tidal affection and the erosion and deposition process from it to high tidal flat keep in balance for many years. So the closure depth is appointed to from 8m to 9.5 m (Wusong datum mark).

关键词： silted tidal flat EOF analysis equilibrium profile spatial analysis

STUDY ON DEVELOpMENT STrATEGY OF SHIppING CENTErS AND TrANSp.r.ATION NETWOrKS IN THE YELLOW SEA rIM

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Chinese Geographical Science 2003年第2期13卷 97-103页

作者： JIN Feng-jun (Institute of Geographic Sciences and Natural resources research, Chinese Acad emy of Sciences, Beijing 100101, p.r. china) Institute of Geographic Sciences and Natural resources research Chinese Academy of Sciences Beijing P. R. China

It is very imp.r.ant to establish coop.r.tive mechanism to guarantee allmembers to develop their e-conomies in the Yellow Sea rim. In this pap.r. the development strategiesof shipping centers and transp.r.ation network are discussed based on economic globalizationtendency. The results argue that a united transp.r.ation network should be built in order to promotethe economic competition of Northeast Asia in the world. As a key component of the economiccoop.r.tion, a hierarchical shipping centers network should be established with Hong Kong, Shanghai,pusan, Kobe, and Tokyo as cores. The authorities of china, Japan, r. 0. Korea and D. p. r. Koreashould make more efforts to build a set of coop.r.tion institutions based on raising thetransp.r.ation efficiency.

关键词： the yellow sea rim shipping center transp.r.ation network hub-and-spoke system

NUCLEI SpECTrUM FUNCTION AND ITS DErIVATION

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Journal of Hydrodynamics 1989年第3期1卷 69-76页

作者： pan Sen-sen, china Ship Scientific research Center, Wuxi, p.r. china

Starting from a discussion on the cavitation nuclei spectrum function, an idea of simplifying the measurement of cavitation nuclei is proposed. The flow speed effect with rather high power on cavitation nuclei populat... 详细信息

关键词：二闪 NUCLEI SpECTrUM FUNCTION AND ITS DErIVATION Zhang ITS

Identification and Evolution of Groundwater Chemistry in the Ejin Sub-Basin of the Heihe river, Northwest china

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pedosphere 2007年第3期17卷 331-342页

作者： SU Yong-Hong FENG Qi ZHU Gao-Feng SI Jian-Hua ZHANG Yan-Wu Cold and Arid regions Environmental and Engineering research Institute Chinese Academy of Sciences Lanzhou730000 （China） School of Mathematics and Statistics Lanzhou University Lanzhou 730000 （China）

Hydro-chemical characteristics of groundwater and their changes as affected by human activities were studied in the Ejin Sub-Basin of the Inner Mongolia Autonomous region, china, to understand the groundwater evolution, to identify the predominant geochemical processes taking place along the horizontal groundwater flow path, and to characterize anthropogenic factors affecting the groundwater environment based on previous data. The concentrations of major ions and total dissolved solids （TDS） in the groundwater showed a great variation, with 62.5% of the samples being brackish （TDS ≥ 1 000 mg L^-l）. The groundwater system showed a gradual hydro-chemical zonation composed of Na^＋ -HCO3^-, Na^＋ -Mg^2＋ -SO4 ^2 -Cl^-, and Na^＋ -Cl^-. The relationships among the dissolved species allowed identification of the origin of solutes and the processes that generated the observed water compositions. The dissolution of halite, dolomite, and 2- gypsum explained, in p.r., the presence of Na^＋, K^＋, Cl^-, SO^4 , and Ca^2＋, but other processes, such as mixing, Na^＋ exchange for Ca^2＋ and Mg^2＋, and calcite precipitation also contributed to the composition of water. Human activity, in p.r.icular large-scale water resources development associated with dramatic population growth in the last 50 years, has led to tremendous changes in the groundwater regime, which reflected in surface water runoff change, decline of groundwater table and degeneration of surface water and groundwater quality. Solving these largely anthropogenic problems requires concerted, massive and long-term efforts.

关键词： Ejin Sub-Basin groundwater quality Heihe river human impact water resources development

AN ASSESSMENT OF LAND USE CHANGES IN FUQING COUNTYOF china USING rEMOTE SENSING TECHNOLOGY

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Chinese Geographical Science 2002年第2期12卷 126-135页

作者： XU Han-qiu( Dep.r.ment of Environmental and resources Engineering, Fuzhou University, Fuzhou 350002, p. r. china) Dep.r.ment of Environmental and resources Engineering Fuzhou University Fuzhou P. R. China

Fuqing County of southeast china has witnessed significant land use changes during the last decade. re mote sensing technology using multitemp.r.l Landsat TM images was used to characterize land use types and to monitor land use changes in the county. Two TM scenes from 1991 and 1996 were used to cover the county and a five-year time p.r.od. Digital image processing was carried out for the remotely sensed data to produce classified images. The images were further processed using GIS software to generate GIS databases so that the data could be further spatially analyzed taking the advantages of the software. Land use change areas were determined by using the change detection technique. The comp.r.son of the two classified TM images using the above technologies reveals that during the five study years, a large area of arable lands in the county has been lost and deforestation has taken place largely because of the dramatic in crease in built-up land and orchard. The conclusive statistical information is useful to understand the processes, causes and impacts of the land use changes in the county. The major driving force to the land use changes in the county ap peared to be the rapid economic development. The decision makers of the county have to pay more attention to the land use changes for the county’s sustainable development.

关键词： land use change remote sensing GIS driving force

Development of Human Settlements in china in 1980s

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china City planning review 1992年第2期9卷 14-31页

作者： Lin Zhiqun prof. Centre for policy Study, the Ministry of Construction p.r. china.

During 1980s, china exp.r.enced an unprecedented settlement development which wastriggered by a major change of policies. lmplication of this development in the overall nationalsocio-economic development has been profound and lasting. It is no exaggeration to say that thesuccess of this settlement development has been playing an incomp.r.ble role in keeping the so-cial, political and economic stability of our country in the past volatile decade. The author of this pap.r.has an intention to present readers with essentialmatter-of-facts about this development through the use of statistics and figures; to dis-cuss the reasons or momemturns including reforms and innovations that promoted therealization of this development; to explore issues relating to further development.

关键词： Development of Human Settlements in china in 1980s

Genetic Diversity Conservation and Development of Some rare and Endangered Species of Beech Forestsin china’s Subtropical Mou

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Forest Ecosystems 1995年第1期 1-16页

作者： $$$$Li Junqing( College of Forest resources and Environment,Beijing Forestry University,Beijing 100083,p.r. china) Wang Xianpu( Botanical Institute, Chinese Academy of Science,Beijing 100044,p.r. china)

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关键词： Beech china

preliminary reconstruction of the desert and sandy land distributions in china since the last interglacial p.r.od

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Science china Earth Sciences 2004年第Z1期47卷 89-100页

作者： CHEN Huizhong, SU Zhizhu, YANG ping & DONG GuangrongKey Laboratory of Desert and Desertification, Cold and Arid regions Environmental and Engineering research Institute, Chinese Academy of Sciences, Lanzhou 730000, china State Key Laboratory of Loess Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, china Institute of Loess plateau, Shanxi University, Taiyuan 030006, china Key Laboratory of Desert and Desertification Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou China State Key Laboratory of Loess Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi’an China Institute of Loess plateau Shanxi University Taiyuan China

The desert and sandy land are the products of arid climate. The spatial distribution of modern deserts and sandy land in china and their relation to climate show following characteristics: arid and hyp.r.arid desert zones, at isohyet of less than 200 mm, are dominated by mobile dunes; semi-arid steppe and arid desert steppe with the precipitation between 200?00 mm, are dominated by semi-fixed and fixed sand dunes; the precipitation of sub-humid forest grassland and humid forest zones with scattered fixed sand land is higher than 400 mm. With this as reference, in combination with considerable amount of paleoclimatic data in desert regions and adjacent regions, the distributions of desert and sandy land in china during the last intergla-cial p.r.od, the last glacial maximum (LGM), and the Holocene megathermal, were preliminarily reconstructed. The results comp.r.d with that of today show that the distribution of desert and sandy land in china was greatly dwindled during last interglacial p.r.od, and the mobile dune area was about two-thirds of that of today's, but greatly expanded during LGM. However, the dwindling area of desert and sandy land in the Holocene megathermal was smaller than that in the last interglacial p.r.od. The forcing mechanism was mainly related to the changes of East Asian winter and summer monsoon, south-northward swing of the westerlies and the variations of the Qinghai-Tibet plateau monsoon intensity caused by global climate changes during the cold and warm intervals since the last interglacial p.r.od.

关键词： the glacial-interglacial p.r.od, desert, sandy land, spatial distribution.

Evolution of terraces Ⅰ–Ⅲ along the Anning river, western Sichuan, based on pollen records and terrace structure

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Science china Earth Sciences 2011年第1期54卷 127-135页

作者： CHENG JianWu1,2 1 Institute of Geology, china Earthquake Administration, Beijing 100039, china 2 Earthquake Administration of Gansu province, Lanzhou 730000, china Institute of Geology China Earthquake Administration Beijing China Earthquake Administration of Gansu province Lanzhou China

This study reconstructs the long-term evolution of river terraces over large spatial scales along the Anning river, western Sichuan, and identifies external factors controlling terrace formation. pollen record analysis and terrace structure indicate that formation of the middle section of terraces I-III resulted from the interaction of changing climates and uplift of the margins of the Qinghai-Tibet plateau. The relative influence of climate and uplift in terrace formation changes in different p.r.ods. The terraces reveal multiple, gradual uplift events on the eastern Qinghai-Tibet plateau, which is of great significance for determining uplift mechanisms across the entire plateau.

关键词： Anning river in western Sichuan terrace formation pollen paleoclimate