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  • 1994 Volume 14 Issue 4
    Published: 20 July 1994
      

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  • Zhou Jianming
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    With analysing six locational elements of frontier trade: geography, politics econo-my,policies transportation and port fundament, territory differences between open con-ditions and main areas of frontier trade are discussded. The important frontiers are in northeast China,Yunnan-Guangdong and Neimeng-Xinjiang respectively.Six characteristics of frontier trade in China are generalized as follows:(1)The function has changed;(2)Agglomeration and spread are formed simultaneously;(3)Quantitative growth is faster than ever;(4)The structure of import-export goods is special;(5)The territory of trade is enlarged;(6)There are various trade ways.
  • Xu Jiongxin
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    Based on the data of dissolved matter measurement collected from more than 70 gaging stations in the rivers of the monsoon-influenced eastern China.this paper deals with the chemical denudational processes, including the effect of zonal factors such as temperature, precipitation, vegetation and the drainage basin dryness upon the chemical denudational rate,and the zonal differentiation in the chemical denudation in the mon-soon-influenced eastern China. As a result, a curve has been established, which shows the latitudinal variation of the chemical denudational rate in this region.It is suggested that, at the macro-scale, temperature, precipitation, drainage basin dryness and vegetation are the main factors controlling the chemical denudational inten-sity. With the increase of temperature, precipitation, forest cover and a decrease of drainage basin dryness,the chemical denudational rate increases. On the other hand,at amoderate and a small space scale,the rock types determine the differences in the chemi-cal denudational rate under the same climatic conditions.An obvious zonality in the chemical denudational processes in the monsoom-influ-enced eastern China has been indicated by this study. The chemical denudational rate is the highest in the tropical and subtropical humid areas in the southern and central China,and it becomes lower in the warm temperate sub-humid areas. In the north China warm temperate semi-arid areas, it declines to the lowest value, when going further northeastward, it increases again in the northeast China cool temperate sub-humid ar-eas. The foregoing zonal variation can be explained by the different combinations of tem-perature,precipitation,drainage basin dryness and vegetation in different natural zones.
  • Xu Pengzhu
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    Based on the numerical simulation technique of unsteady flow,an applied mathema-tical model has been established to compute the tidal currents in the tidal river network of the downstream areas of the Sheyang River Basin. The model is mainly the node-channel model and can be applied in water quantity computation for large-scale complex river networks in plain areas. The computational results show that the model can pre-cisely simulate the tidal currents.On the basis. of successful simulation of the tidal currents that happened in the past, the model has also been applied to predict the tidal current changes in the case of sea level rise. The predicted results show that:(1)If the sea level rises,the water level and tidal level of each river will also rise.(2)The average high tidal level just down Sheyang and Huangsha sluice gates will rise approximately as much as the value of sea level rise,while the rising scope of the av-erage low tidal level will be smaller than that of sea level,thus the tidal range will in-crease.(3)The discharge capacity of all rivers which connect with the Yellow Sea will de-crease obviously.At last,the author analyses the changes of the flood/waterlogging disasters if the 1991 flood meets with future sea level rise, and puts forward some countermeasures about disaster reduction and prevention.
  • Huang Jing, Dong Suocheng
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    By far almost natural resource assessments are single resource analyses. Though re-gional resource assessments seem to be comprehensive,these assessments can not fit into practices and left many problems to be solved by other remedial measures. For these rea-sons, the paper presents a new comprehensive natural resource assessment. The method is to analyse the entirety of combined natural resources including their sorts,quantities and qualities (grades) in a given region,to diagnose the combination,value construction of natural resources,and to put forward a series of developing orders,patterns and pro-cedures. The purposes are to avoid waste of resources,to prevent natural resources from being destroyed,and to help producers establish developing natural resource complex. Afterwards, the paper narrated the classificational principles (comprehensive,multiple developing and demarcation lines mainly coincidence),20 graphic relations of resources and regional conditions, 16 items and their indexes, as well as method, procedure and system of comprehensive natural resource assessment.
  • Tian Desen, Xie Shunping
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    In order to bring the cartographical communication function of spatial information into full play,the development of computer assisted cartography and requirement of map use in modern science and technique needs a talking map. Based on comparison of several methods to make talking map,a technique of automatic Chinese syllable synthesis by computer is adopted to make talking map. This technique fits the development of digital map and electro-acoustical technique. The construction and characters of talking map system which has been made successfully are described. The functions and the signifi-cances of talking map are approached from theory and practice in this paper.
  • Xu Youpeng, Gao Yunyu, Yang Wu
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    In this paper,water resource characteristics of rivers in nouth slope area of the Kun-lun Mountains are described, and the structure features and variation law of annual runoff series are illustrated by applying time series analysis method. On the basis of these researches, the suggestions of rational exploitation and utilization of water re-source in these areas are put forward.
  • Wang Xiaoming, Xie Jingfang
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    In this paper, the ralation of the distribution of strong convection weather occurring in Jilin Province and the mesoscale weather system causing strong convection weather to the topography in Northeast China was analysed. The analysis results can be used as a reference for forecasting the strong convection weather.
  • Liu Peng
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    Mazongling Natural Reserve (one of the richest plant area of the Dabie Mountain) located at Jinzhai county in the west of Anhui Province, is the transitional region from the north subtropical to warm temperate zone. It is known that there are 1192 seed plants, which belong to 547 genera and 138 families. The studies are based on the origin and evolution of the flora in geological period. According to statistics and analysis of genera in the present flora, 547 genera can be divided into 15 distribution-types (con-taining 11 subtypes), which belong to five categories: 1) cosmoplitan genera 60 (10.9%),2)temperate genera 304 (55.5%),3)tropical genera 167(30.6%),4)ancient Mediterranean and Central Asia genera 2 (0.2%),5) Chinese endemic genera 14 (2.6%). The studies show that the temperate genera have the highest percentage and the flora is related with every part of the world, especially closely related with North America and Japan.
  • Zhou Zikang, Xia Yuejiong, Liu Weilun, Wu Weitang
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    This article analyses the animal and plant remains in more detail,obtained the third and fourth cultural deposit layers (about 7000 to 6000a B. P.)at Hemudu site in Zhejiang Province. Firstly, using Andersen’s method.a correction is made for the percentage of various plant’s spore and pollen in these layers. Secondly, on the basis of these results, the dominant species and the construction community species of zonal forest vegetation are identified, and the paleovegetation of Holocene Hypsithermal is reconstructed in Guangdong Hemudu region. Finally, contrasting the above-mentioned paleovegetation with the vegetation of Wuyanling Natural Reserve in southern Zhejiang and Dinghushan Natural Reserve in GuangDong today,the paleoclimate is also reconstructed in the said region during that time.
  • Hou Benqi
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    Today the industrial structure of Beijing is ont only conflict with the characteristics of resource and environment, but also lack far behind the economic development. The objective law of industrial structure evolution demand to change the existing industrial structure and achieve the industrial structure rationalization and escalation. By qualita-tive analysis and quantitative analysis.we get the following conclusions :to take electro-nic industry and auto industry as the leading industry and give priority to the progress of them,to pay more attention to the development of high-technology industry,engineering industry,printing industry and sewing industry,in the mean time to reconstruct the iron and steel industry,chemical industry,building material industry,coking industry,paper-making industry,power industry and oil industry in order to mitigate the more and more intense restrain of resource and environment. In the long run,the development of Beijing demand objectively that industries which not fit to develop in Beijing be transferred to other areas when the social and economic conditions are ripe.