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  • 1987 Volume 7 Issue 2
    Published: 20 March 1987
      
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  • THE LAND USE CHARACTERISTICS OF COASTAL LAND IN JIANGSU PROVINCE
    Zhu Jiwen, Ji Zixiu, Jiang Zixun, Liang Haitang
    1987, 7(2): 101-110,197. https://doi.org/10.13249/j.cnki.sgs.1987.02.101
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    Most of the coastal land of Jiangsu Province came into being due to the coast advance caused by the capture of the Huaihe River by the Huanghe River in the 12th century, consisting of two parts: the alongshore land about 10-20 kilometers in width and the tidal flat of about 4800 square kilometers. By centuries management it has been developed into an intensive farming area in which salt industry and aquatic products industry have been developed to some extent. The land use in this area influenced by natural features,resource structure and human activities is characteristic of the following. 1) The land use patterns in the area are more diverse than in contiguous inland area. 2) Different segments have different land use patterns. Salt industry are dominant sector in northern part, while cultivation and aquatic products industry in southern part. 3) All patterns of land use are interrelated and interact on each other, benefit or restrict each other. 4) The land use patterns are easy to change with natural and socioeconomic conditions. One must keep the above characteristics in mind when making project for using and developing the coastal land. In order to change the sigle-product economic situation we should pay attention to not only the dominant sector of certain segment but also the comprehensive utilization of natural resources.
  • MIGRATION CHARACTERISTICS OF MICROELEMENTS IN PROCESS OF LANDSCAPE GEOCHEMISTRY IN MT. NAMJAGBARWA AREA
    Dou Yijian, Peng Buzhuo, Zhao Peidao, Liu Yumin, Li Chunhua
    1987, 7(2): 111-120,197. https://doi.org/10.13249/j.cnki.sgs.1987.02.111
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    To provide scientific basis for appraising natural resources in Mt. Namjagbarwa area, the migration characteristics of geochemical microelements, such as Zn, V, Ti, Pb, Ni, Cu, Cr, Co, Be and Ba, in the landscape zones of alpine scrub and meadow, the mountainous dark coniferous forest, the mountainous mixed broadleaf and coniferous forest, the mountainous quasi-subtropical semi-evergreen broadleaf forest, the mountainous subtropical evergreen broadleaf forest, and the valley quasi-tropical monsoon rainforest have been described in the paper.
  • AN IDEAL SURFACE MOISTURE(ARIDITY) INDEX-EVAPORATION RATIO
    Wu Houshui
    1987, 7(2): 121-128,197. https://doi.org/10.13249/j.cnki.sgs.1987.02.121
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    Advantages of using evaporation ratio (E/E0) as surface moisture (aridity) index were demonstrated according to the water balance equation. A new method for estimating the natural surface evaporation (E) in a short period was suggested. Finally, two different type moisture conditions of the North China Plain and the Hainan Island were calculated. The results tallied with the actural situation much more than usual method.
  • THE HOLOCENE ALONG THE COAST OF HAINAN ISLAND
    Zhang Zhongying, Liu Ruihua
    1987, 7(2): 129-138,197. https://doi.org/10.13249/j.cnki.sgs.1987.02.129
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    According to the new data from investigation of the Quaternary geology along the coast of Hainan Island, the paper puts forward that the Holoeene strata in this area can be divided into four formations i.e. Wanning formation (Q41), Sanya formation (Q42-1), Qiongshan formation (Q42-2) and Ledong formation (Q43). Aeeording to the analysis of spore-pollen, the Holocene can be divided into 6 spore-pollen zones, reflecting two cycles of climatic fluctuation from warm-dry to hot-humid. The most hot-humid period occurred in 6000-5000 years B.P. Based on the 14C dating of 38 samples representing the positions of ancient sea level,and dispelled the influence of tectonic movement, a curve of sea level change is established. It shows that there are two cycles of rise-drop of sea level and three periods of high sea level, the period of the highest sea level is 6000-5000 years B.P. According to the rate of rise or drop of sea level, four periods on the curve can be distinguished. The change amplitude of the sea level is about ?6 meters from 6000 years B.P.
  • LOESSIC GULLY NETWORK AND NEOTECTONIC STRESS FIELDS
    Wang Jingming
    1987, 7(2): 139-146,197. https://doi.org/10.13249/j.cnki.sgs.1987.02.139
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    The loessic gullies not connected directly with river systems are widely spread in the Q2-4 loess of Fenwei Basin. The loessic gullies are directional, independent, regional and intersected with the network. The strike of many groups of gullies presents a clockwise deflection from west to east. Field investigation indicates that the loessic gullies were formed by ioessic tectonic joints constantly suffered from ground water corrosion. Therefore, the sprea ding directions and developing degrees of both tectonic joints and gullies are correspondent. The neotectonic stress field of Weihe Basin determined by loessic conjugate shear plane corresponded with gully network coincides essentially with the neotectonic stress field determined by river systems and earthquake. The study of loessic gully network is of great significance for searching out groundwater, researching soil erosion, recovering neotectonic stress field and predicting earthquake.
  • THE SPORE-POLLEN GROUPS OF PEATLAND ON RUOERGAI PLATEAU AND PALEOBOTANY AND PALEOCLIMATE
    Wang Manhua
    1987, 7(2): 147-155,197. https://doi.org/10.13249/j.cnki.sgs.1987.02.147
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    The Ruoergai Plateau as an island mountain plateau 3300-4000 meters above sea level is the largest bog land on plateaus in the world. The author carried out spore-pollen analysis of 106 samples from 5 peat profiles on the plateau, determined 14C dating of 11 samples, and studied evolution law of vegetation in the last ten thousand years and relationship between climatic features and special plateau environment. The spore-pollen groups were dominated by herb pollen, followed by xylophyta pollen, pteridophyte spore content was the lowest. The reflected vegetation type mainly consisted of sedge-dominated subalpine meadows and subalpine bushes. The micro environment of developing peatland was sedge-dominated swampy meadow. But in the Holocene, evergreen conger forest mainly with pine and broadleaf tree forest mainly with Quercus and Birch increased, climate got warm obviously, temperature was 4℃ higher than now. It was the time of most suitble climate. Based on the vegetation succession law, the climate in the Holoeene can be divided into 3 stages-early, middle and late. The climatic change was cold-damp→warm, humid→cold-slight dry, basicly corresponding to the climatic change all over the world. But the climate on the plateau was special because it was controlled more greatly by the hight than the lattitude. The vegetation change was not so obvious as plain area. The range of climate variation was little. Under the long cold damp climatic condition, plant residues decomposed weakly and peat accumulated continually to form large peat deposits.
  • AN APPROACH TO SEVREAL PROBLEMS OF ENVIRONMENTAL MAP
    Zhou Ming, Liu Zhaoyong
    1987, 7(2): 156-162,196. https://doi.org/10.13249/j.cnki.sgs.1987.02.156
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    The environmental map is a new kind of special map for transforming, storing and transmitting spatial environmental information figures, on the basis of the research results of environmental sciences and the theory of cartography. It serves a particular function in the study of regional environment. The analytical mapping and integrative mapping of environmental maps are the means of the scientific generalization and comprehensive summation of regional environmental study, and an important expressive form of research results of regional environment as well.Environmental map itself is a special research method of regional environmental regularity.Its mathematic accuracy and geographical basis are the criterion for verifying the accuracy of regional environmental location and judging the level of regional environmental research. Environmental map can be divided into natural environmental backround map, environmental medical map,environmental pollution map, environmental quality prediction map, environmental protection engineering map and so on, according to the contents and characteristics of mapping information. The expression method of environmental map is to transform environmental information into figure information for transmitting. The environmental information distribution has three basic forms of point, line and area. The environmental information distributed in point shape should be transformed into figures of location symbol and location statistics. Line-shape information can be transformed into line-shape figures or figures of location statistics. Areal information can be transformed into eolour base figures, isogram, net figures, point number figures, graded statistical figures, divisional statistical figures and range figures respectively based on concrete features.
  • THE INFLUENCE OF CO2 ON CLIMATE AND CLIMATIC TREND PROBLEM
    Yao Tanndong
    1987, 7(2): 163-170,196. https://doi.org/10.13249/j.cnki.sgs.1987.02.163
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    The two different viewpoints on climatic change reflect two aspects of natural climatic cnange and human activity influence. Human activity influence on climate is mainly temperature-increasing effect(caused by increase of CO2 content in atmosphere). Cold and warm trends reflected by the climatic changes with time are different. Human activity influence only superimposes the trends, retarding, intensifying of even controlling climatic changes Before the twenty first century climatic change won’t be controlled by human activity influence, but still by natural climiate a change processes.
  • THE ANALYSIS AND PROPOSAL ON THE CORRELATION EQUATION OF HEAT AND WATER BALANCE
    Yang Yuandong
    1987, 7(2): 171-178,196. https://doi.org/10.13249/j.cnki.sgs.1987.02.171
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    On the basis of analysing various correlation equations of heat and water balance up to now, according to the connection of runoff coefficient a and drought index β and a characteristic parameter θ to reflect the effect of climate and underlying surface, the following equation was proposed, α=(1+βθ)1/θ-β, in which f=runoff, r=precipitation, E0=evaporation capacity. They are all in millimeter per year. The proposed equation in the paper is feasible and has a fairy precision after it was verified by the data from every continent all over the world, the Huanghe River basin, Nei Monggol Autonomous Region, the East China, and Hainan Island in our country.
  • A STUDY ON BACKGROUND VALUES OF Fe AND Mn AND THEIR FORMATION FACTORS IN THE XIANGJIANG RIVER SYSTEM
    Zhao Guijiu, Zhang Lichang, Zhang Shen
    1987, 7(2): 179-185,196. https://doi.org/10.13249/j.cnki.sgs.1987.02.179
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    The paper discussed the background values of Fe and Mn and their characteristics in the water and sediments in the Xiangjiang River system of the subtrophics of China; and approached the environmental factors-pH value, Eh value, turbidity, and contents of SO4- and Cl-, and the influence of the geochemical properties of Fe and Mn on the background values.
  • PROCESS IN RESEARCH ON POPULATION GEOGRAPHY
    Chen Jiqing
    1987, 7(2): 187-192,196. https://doi.org/10.13249/j.cnki.sgs.1987.02.187
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    Population Geography is a science studying regularity of geographical population distribution. Geographical population distribution depends on production mode and is controlled by the natural and economic conditions of socity. The science of production relation is the foundation of studing population geography, the theory of regional division of labour is the basis, and geographical environment is the condition.Population geography belongs to the category of social sciences, and is also an independent discipline among geography. As for the research fields of population geography, scholars at home and abroad have different opinions. The author however thinks that population geography should include: a) preface, b) population number,c) population composition, d) population change, e) population migration and f) population policies. Certain countries in the world have over hundred years history in studing population geography, and have published lots of papers and monographs to promote the development of population geography. China also has a long history in studing popualtion problems. The study of population geography has been conducted for over a century. In modern and current journals such as"Orient Journal", "Geography Journal","Acta Geographica Sinica" and so on the papers on, population geography published. Especially "Chinese Population Books" and "Modern China, Volume for Podulation" have opened up a new prospect for population geography. In brief, on the basis of studying popualtion theory and population polocies, population geography should make a further study of population reproduction and population redistribution so as to solve the problem of coordinate development of two production, i.e.the production of material goods and the production of human beings themselves.