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  • 1986 Volume 6 Issue 3
    Published: 20 May 1986
      
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  • THE DEVELOPMENT AND REARRANGEMENT OF THE YELLOW RIVER DELTA
    Huang Chunhai, Zhang Zulu
    1986, 6(3): 197-205. https://doi.org/10.13249/j.cnki.sgs.1986.03.197
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    The Yellow River delta is divided into four-grade landform types in this article.An ancient Yellow River delta was first found,it is located inthe western section of Lijin County of Shandong Province and formed between 40 B.C.and 1048 A.D.The development of the Yellow River delta can be differentiated by three stages,i.e.ancient,modern and contemporary. Based on the above-mentioned studies,the delta district can be divided into six subdistricts according to land-use conditions and the measures of rearrangeanent for these subdistricts were put forward respectively in the paper.In the light of the regularities of discharge changes and silt transportation of the Yellow River delta,The auther suggest that the water of the river should not be channeled in high flow seasons in order to let the floodwater down-erode the bed and that the water should be drawn into the fields in dry seasons in order to leach away salt by irrigation and restrain alkalinity by deposition.
  • PROFESSOR WISSMANN WAS IN CHINA
    Yan Deyi
    1986, 6(3): 206-211. https://doi.org/10.13249/j.cnki.sgs.1986.03.206
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    This paper asseses Prof.Wissmann’s teaching career and his field investigation on topography in China during 1032-1937.Among of them,the emphysis of the investigation was placed on the granite topography in Huangshan and Laoshan mountains,the brush landscape in Yunjiang gorge of the upper reaches of the Honghe River,the acient channels in lower reaches of the Yangtze River,the genesis of loess and China’glaciate periods,all of them made a contribution to the start of the geomorphology and quaternary of China.
  • ANALYSIS OF REGIONAL DIFFERENTIATION IN PHYSICAL AND CHEMICAL NATURE OF THE SUSPENDED SUBSTANCE IN THE MID-REACHES OF THE YELLOW RIVER
    Jin Xiangchan
    1986, 6(3): 212-221. https://doi.org/10.13249/j.cnki.sgs.1986.03.212
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    The main physical and chemical nature of the suspended substance, compositions of clay soil menesal in the mid-reaches of the Yellow River were analysed and the region a 1 differentiations were studied in this paper.The results show that the contents of suspended substance were higher,silt diameter was more coarse,for the main river,but the contents of organic matter of suspended sub-stance were lower,therefore,the capacity of cation exchange was smaller for the the tributaries,for extance in the Fenhe River and Weihe River.The chemical components of suspended substance are similar to that of loess parent material in this area, according to analysis of regional soil and chemical component of silt, therefore the author suggests that suspended substance for each profile mainly came from loess area of the reaches of the Yellow River and the regional differentiations have determined the physical and chemical nature of suspended substance.
  • ON BASIC CHARACTERISTICS OF VERTICAL DISTRIBUTION OF HEAT FLUX IN SOIL IN LHASA
    Chen Wanglong, Weng Duming
    1986, 6(3): 222-228. https://doi.org/10.13249/j.cnki.sgs.1986.03.222
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    The paper calculates and analyses vertical distribution of heat exchange and its change with depth and time,The amplitude of heat exchange in various layer of soil increases with depth,but its value decreases in index law,and is approximately proportional to average amplitude of temperalude gradient in the same layer of soil;The phase of heat exchange delays with depth in accordance with linearity,but the initial phase is earlier π/4 than average temperature wave in the same layer,On this basis of calculation of heat exchange,using Lagrange interpolation,the paper calculates the vertical distribution of heat flux of soil layer from surface to depth of 3cm and indicates that in order to measure heat flux of surface soil,it is better to put the transducer of flux plate under the surface soil about 0.5cm of depth.
  • RETROSPECTIVE ANALYSES ABOUT POLLUTION AND MIGRATION OF MERCURY ON THE SECOND SONGHUA RIVER
    Wang Renhua, Wang Shuhai, Wang Qichao
    1986, 6(3): 229-240. https://doi.org/10.13249/j.cnki.sgs.1986.03.229
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    The Second Songhua River had undergone a serious,a remissive and a recoverable periods of mercury pollution level during the reseaches (1973-1983).In the serious period,input rates of mercury and methylmereury separately had kept 33kg/day and 1.5kg/day.The level of pollution showed analogy with the Agano River where occurred the second Minamata disease in Japan. In the course of recoverable period,the input rates of mercury and methylmercury sparately had reduced to 0.3kg/day and <3 g/day.So,pollution of water,sediment and fish has been changed into slight and medium levels.Accumulated mercury in sediment amouned to about 50T.It’s to exist as compound with insoluble organic matter and ethiopsite.Deposited mercury entered again into water through scoured and suspened process that maker up about 85 per cent for the total mercury concentration.Mercury of solution transfer mak.ed up <15 per cent.Methylation of mercury is very weak in the sediment.So,concentration of methylmercury is only slightly higher than the environmental background level in the water (0.15ppt).It’s not enough to make methylmercury pollution. Deposited mercury has been outputted by the aquatic environment such as runoff,sanding,irrigation and volatilization et al.The mean output rate of deposited mercury was 0.06.Because output processes of mercury has slow carried under lower concentration conditions,it will not be able to produce new harmfulness on the surroundings.If the pollution source will be strictly controlled,deposited mercury will be purified by the natural purification in the Second Songhua River.
  • METHOD AND BRACTICE OF MARINE REMOTE SENSING DIGITAL IMAGE PROCESSING
    Huang Baoting
    1986, 6(3): 241-246. https://doi.org/10.13249/j.cnki.sgs.1986.03.241
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    Remote sensing digital image processing is a branch of computer science.Author studied,recently,the efficient method for extracting ground informat.ion on estuary area and coastal zone in South China Sea,Huanghe River mouth,Changjiang River mouth and Jiaozhou Bay and made proffesional interpretation and effect evaluation.This paper points out the key to get a good quality picture is reasonable choice and design for processing function according to the histogram of oringvnal image,the compensation process of film non-leaner feature and mean value and variance adjustment matching for the compensation process.
  • ON THE REPRESENTATIVENESS AND SIMILARITY OF FIELD OBSERVATION STATIONS
    Chen Yongshen, Ye Fangde
    1986, 6(3): 247-253. https://doi.org/10.13249/j.cnki.sgs.1986.03.247
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    This paper deals with the representativeness and similarity of field observational stations,the author recommends a new method to obtain optimum value of a region in order to reveal the similarity of heat course in two field stations. The similarity problem is not only analysed in theory,but also examined with heat observation value in the paper.The results are quits satisfying too.
  • THE SPORE-POLLEN ANALYSIS AND SIGNIFICANCE OF THE NORTH-WEST YUNNAN PLATEAU IN THE HENGDUAN MOUNTAINS
    Wang Peifang, Sun Guangyou
    1986, 6(3): 254-260. https://doi.org/10.13249/j.cnki.sgs.1986.03.254
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    Five pollen diagrams reveal palaeophytes and palaeoclimate changes during the Holocene in the North-West Yunnan Plateau of the Hengduan Mountains.The Holocene period can be divided into five stages,the vegetation and climate of each site have nothing in the common with each other. In the North-West Yunnan Plateau,swamp isn’t developed at the same time,the initial stage of swamp-forming is early period of the early Holocene,die out at late period of the middle Holocene.
  • THE PRINCIPAL COMPONENT ANALYSIS OF THE RIVER IN JILIN PROVINCE
    Yang Binggeng, Liu Changhuan, Zai Yaozong, Li Huiming, Wang Jun, Shang Jincheng, Ji Yongming
    1986, 6(3): 261-268. https://doi.org/10.13249/j.cnki.sgs.1986.03.261
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    By means of principal component analysis,based on 5 principal components chosen by computer,the author divides the spatial disttributions of river into gathering models.This paper also proceeds the gathering analysis using Euclidean distance,which is based on the analysis of the similarities and differences of the spatial distributions.
  • THE TRIAL DISCUSSION OF THE USE OF RADIATIVE ARIDITY INDEX IN ANHUI PHYSICAL GEOGRAPHICAL ZONES
    Guo Baoxing, He Luhui
    1986, 6(3): 269-276. https://doi.org/10.13249/j.cnki.sgs.1986.03.269
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    This paper discusses about the problem of the physical geographical zone in Anhui province in the light of the balance of heat and water in geographical condition,i.e.the radiative aridity index and the radiation balance. According to the formula,the evaporative power E=(δ/(δ+r))(1/L)×0.8Q-(δ/(δ+r))(1/L)Re+(r/(δ+r))Ea and coefficient K=E/r and R=Q(1-a)-Re,the radiative can be calculated. Based on the chart showing the radiatative aridity index,the author divide temperature zone with K and natural zones with K,and regards the isopleth of R= 60kcal/cm2.yr as the derision between the warm temperate zone and the subtropical zone,the isopleth,of K=1.1 as the division between the deciduous broadleaf forest (brown earth) zone and the northern subtropical deciuous and evergreen broadleaf mixed (forest yellow-brown earth) zone,the isoplth of 0.8 as divesion between the northern subtropical deciduous and evergreen broadleaf mixed forest (yellow brownearth) zone and the mid-subtropical evergreen broadleaf forest (red-yellow earth) zone.Therefore,Anhui province can be diveded into three natural geographical zones:(1)The warm temperate submoist region-deciduous broadleaf forest (brown earth) zone. (2)The northern subtropical moist region-deciduous and evergreen broadleaf mixed forest (yellow-brown earth) zone. (3)The mid-subtropical moist region-evergreen broadleaf forest (red-yellow earth) zone.
  • FEATURE OF CADMIUM DISTRIBUTION IN SOIL IN BEIJING AREA
    Xia Zenglu, Li Senzhao, Mu Congru
    1986, 6(3): 277-283. https://doi.org/10.13249/j.cnki.sgs.1986.03.277
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    The feature of cadmium distribution in profiles of some natural soil in Beijing area were discussed in this paper. Under natural condition,the cadmium was accumulated in B layer of brunisoilc soil,However,it was not accumulated obviously in leached drab soil and typical drab soil,and it was not accumulated in ling drab soil. The content of cadmium in surface was always higher than that of the subsoil in fluvo-aguic soil.The content of cadmium was increased with soil texture grade increase in subsoil of fluvo-aquic soil. The map of cadmium distribution in soil in Beijing area was drawn. Rcgional differentiation of cadmium in natural soil was less. Little soil were pollutcd in vary degress at sewage water irrigation area.
  • A STUDY ON TRANSFORMATION WAY OF THE PEAT MOOR OF LONGRIBA REGION
    Yang Fuming, Yang Zongrong
    1986, 6(3): 284-289. https://doi.org/10.13249/j.cnki.sgs.1986.03.284
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    The Ruoergai marsh is the largest peat moor of the plateau and frigid zone in China.It is disteibuted intensively over Ruoergai,Hongyuan and Aba counties,Sichuan province.The area of the peat moor is about 31.14% (1315280 acre) of the region’s total pasture area.Though the number of livestocks have increased 4.5 times since 1949,the development of the region’s animal husbandry is hindered obviously for the moor gathering water and parasites breeding.Therefore,certain representive the Longriba peat moor was selected as a study base that was transformed in 1980. This paper mainly approaches the effects and relations of some factors (physics,chemistry,biology et al.)to the moor transformation,and provides some useful experiment for improving and expending pasture.