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CN 22-1124/P
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  • 地理科学
      1999年, 第19卷, 第1期 刊出日期:1999-01-20 上一期    下一期
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    论文
    长白山高山苔原研究的进展——献给中华人民共和国建国50周年
    黄锡畴
    地理科学. 1999, 19 (1): 2-9.   DOI: 10.13249/j.cnki.sgs.1999.01.2
    摘要   PDF (1097KB)
    长白山高山苔原是我国唯一典型的极地自然景观类型。论述了1959年发现高山苔原的背景和依据。对高山苔原生态系统各组成要素的物理、生物、化学特性和过程以及与国外若干苔原比较研究的进展,作了回顾和综述。
    The alpine tundra discovered in Changbai Mountain in 1959 is a unique typical arctic landscape type in China. Thereafter, continuously integrative researches on the natural environment, ecosystem components and their physical, biological and chemical process of alpine tundra have been carried on and made mighty advances. The exsiting eco environment of alpine tundra is described and analysed integratively in this paper. First, climate conditions, that is, severe cold, high humidity and strong wind, result in vegetation type of alpine tundra. Moreover, snow cover in winter and near surface mircoclimate in summer favor the growth of shrub, subshrub, perennial herb, moss and lichen. Second, the volcanic landform, glacial landform and periglacial landform on alpine zone, which not only form geomorphic complex but also construct various microhabitats, restrict the formation and distribution of tundra vegetation and soil. There are not many kinds of plants on alpine tundra zone. According to statistics, there are 110-131 species of vascular plants belonging to 31 families and 78-87 genera; 135 species of moss belonging to 38 families and 67 genera and 70 species of lichen under 11 families and 22 genera. As for the plant community, different scholars have different dividing schemes. In view of the similarity of alpine tundra to arctic tundra, the appearance, composititon, floristic elements and ecological characteristics are explained respectively. Because alpine tundra is regarded as a special biogeochemical unit, the comprehensive researches on the chemical elements in all environmental components, including elements composition, content, distribution, migration and circulating laws etc., are discussed in this paper. Since the author once investigated tundras in Lapland (Finland) and Daisetsu (Hokkaido, Japan), the comparative study was accomplished, too. The result verified the scientific conclusion of the south boundary of mountain tundra distribution in the east of Eurasia.
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    ’98嫩江、松花江洪水与流域综合管理
    吕宪国, 张为中
    地理科学. 1999, 19 (1): 10-14.   DOI: 10.13249/j.cnki.sgs.1999.01.10
    摘要   PDF (805KB)
    1998年夏季,嫩江、松花江流域发生历史罕见的洪水。此次洪水主要特征是水位高、水量大、持续时间长、灾情严重。由于嫩江支流相继发生洪水,致使嫩江干流出现三次较大的洪峰。农作物受灾面积456×104hm2,倒塌房屋115×104间,直接经济损失超过300×108元。洪灾的主要原因是雨量大、汛期长,土地利用不合理,区域生态环境退化,缺乏控制性水利工程。亟需开展流域综合管理工作,加强水利工程建设,尤其是控制性水利工程建设,发展生态安全型农业。
    In the summer of 1998, an exceptionally serious flood, with the characteristics of high water level, large volume of flow, long duration and serious losses caused by the disaster, occurred in the Nenjiang River valley and the Songhua River valley. Greater flood peak occurred three times in the trunk stream of the Nenjiang River due to the floods occurred in its tributaries one after another. At Jiangqiao Hydrometric Station, the water level was 141.90 m and the rate of flow was 12000 m3/s. The flood is ranged to a catastrophic one which occurs once in 50 years. Ranged to a catastrophic flood at Qiqihar Hydrometric Station that occurs once in 400 years, its water level, 0.89 m higher than the former all time high, was 149.30 m and the corresponding rate of flow was 14800 m3/s. The water level that exceeded the all time high lasted for 7 days. At Harbin Hydrometric Station, the water level, 0.59 m higher than the former all time high, was 120.89 m and the corresponding rate of flow was 17400 m3/s. The water level that exceeded the all time high lasted for 9 to 10 days. The flood here is ranged to a catastrophic one which occurs once in 150 years. The flood of the Nenjiang River damaged 456?104 hm2 of crops and 1.15 million rooms and the direct loss of economy exceeded 30 billion yuan (RMB). The main reasons of the flood are the great rainfall, the long flood season, the unreasonable land use, the regional ecological environment degradation and the lack of water control projects. It is obvious that the following measures are greatly needed: the comprehensive management of the river valleys; making development planning of the river valleys; strengthening water conservancy projects, especially the water control projects; the development of agriculture based on ecological security.
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    京九铁路沿线地区投资环境的改善与区域发展研究
    钱志鸿, 叶舜赞, 田文祝
    地理科学. 1999, 19 (1): 15-20.   DOI: 10.13249/j.cnki.sgs.1999.01.15
    摘要   PDF (750KB)
    概要地分析了京九铁路对沿线地区影响的可能表现,分析了该地区形成中的三大黄金地段潜在的良好发展前景。对沿线地区地位突出的16个城市的投资环境进行了综合评价,对其发展前景进行了预测。最后就如何进一步改善投资环境、发挥京九大动脉的作用、加速沿线地区发展提出了建议。
    The Beijing-Kowloon Railway, a newly built up main line, has great influence on the development of society, economy and urbaniztion of the vicinity. On the basis of analysis mentioned above, three best sections of the areas are identified and their advantages in the meaning of investment environment are discussed in detail. The section of Shenzhen-Huizhou is the best one where ocean faced, export oriented and high tech industries could grow very well. The section of Nanchang-Jiujiang has some advantages for development of resources exploited, processing, manufacturing and high tech industries, and the section of Fuyang-Shangqiu has the great potential for resource processing, local commercial and trade industries. In addtion, 16 cities passing through by the railway have been evaluated and classified for their comprehensive conditions and main functions in the regional development. All these cities can be ranked into three classes: at the top rank are Nanchang, Jiujiang and Huizhou; at the middle rank are Fuyang, Shangqiu, Heyuan, Liaocheng and Ganzhou, and at the lowest rank are all other cities. In order to give full play to Beijing-Kowloon Railway, improve the investment environment and quicken the regional development, some suggestions have been put forward for the infrastructure construction, industrial development, tourist industry, regional cooperation and competition, and necessary policies from governments.
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    植物物候期的频率分布型及其在季节划分中的应用
    陈效逑, 曹志萍
    地理科学. 1999, 19 (1): 21-27.   DOI: 10.13249/j.cnki.sgs.1999.01.21
    摘要   PDF (897KB)

    在前人物候季节划分研究的基础上,提出了划分自然景观季节的物候频率分布型法,并利用北京小西山山前一带物候历中的资料,将当地的物候季节划分为12个季段。划分结果表明,每个季节阶段都具有典型的植物物候形态组合与色彩组合,独特的季相特征,并且与气温和降水的季节分配状况相吻合。本方法与以往的物候季节划分方法相比,具有划分指标定量且综合、划分季段详细、季节的内涵丰富、适用区域范围广阔等特点。


    In this paper the authors advance a new method called Phenological Frequency Distribution Pattern for determining the seasonality of natural landscapes and divide the phenological season in the foot area of the West Hill of Beijing into 12 stages using the data of the local phenological calendar. The result shows that each season stage has the typical morphological and coloration combination of plant phenology and the unique seasonal aspect, and is coincident with the seasonal distribution of air temperature and precipitation. Comparing this method with former methods, the new one has several characteristics, such as using quantitative and integrative indexes, determining more detailed season stages, comprising substantial season contents and having extensive regional applicability.

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    利用外资与发展国际产业联系——山东半岛韩国投资企业典型调查分析
    樊杰, 庞效民, 杨晓光
    地理科学. 1999, 19 (1): 28-34.   DOI: 10.13249/j.cnki.sgs.1999.01.28
    摘要   PDF (795KB)
    基于对山东半岛韩国投资企业进行典型企业访问调查的数据和认识,力图从企业角度认识我国利用外资和发展国际产业联系之间的关系。了解和分析韩国投资者的具体投资动机及其对当地投资环境的评价,深入认识我国山东半岛地区和韩国之间资金流动以及经济技术联系的主要机制和动态格局。通过对韩国投资企业产业联系基本特征的解剖分析,论证韩国投资对我国发展国际产业联系、推动我国地方经济参与国际劳动地域分工的作用。从而为进一步加强中国和韩国的经济交流与合作、正确认识利用韩国投资对山东半岛经济国际化发展前景的影响提供科学依据,同时也是企业地理学的实证研究实践。
    Based on the results of a case study on the South Korean invested enterprises in Shandong Peninsula, this paper aims at elaborating the relationship between the utilization of foreign investment and the development of international industrial linkages of China from enterprise point of view, as well as providing scientific foundation for the further development of Sino South Korea economic integration. Motivations for South Korean investors to enter Shandong Peninsula are analyzed and the evaluation on the local investment environment by South Korean investors are given in the paper. Besides, the basic industrial linkage features of South Korean invested enterprises, mainly concerning equipment and technology, raw material supply, market and management are explained in depth, which show light on the dynamic pattern of the emerging international division of labor between Shandong and South Korea.
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    雅鲁藏布江流域土地沙漠化现状与成因初步研究——兼论人为因素在沙漠化中的作用
    董玉祥, 李森, 董光荣
    地理科学. 1999, 19 (1): 35-41.   DOI: 10.13249/j.cnki.sgs.1999.01.35
    摘要   PDF (998KB)
    利用最新的普查数据,首次详尽分析了该区土地沙漠化的类型、面积、分布及危害,通过对其沙漠化影响因素及其相互关系的分析,辅以定量方法系统阐述了该区土地沙漠化的成因,并探讨了藏南河谷农牧区人为因素在沙漠化过程中的作用及其机理。
    The Yarlung Zangbo River basin is one special zone in the south of Xizang, its types and distribution and causes of desertified land have special features. By use of the last data of desertification survey, this paper analyses the area, types, distribution and damages of desertification in Yarlung the Zangbo River basin. Through analysis on the factors influencing desertification and their relations, this paper makes use of some quantitative analysis method to study systematically the cause of desertification, and thoroughly studies the effective ways and its mechanism of artificial factors on desertification process in this special zone in the southern Xizang. The basic conclusions are as follows: There are 3 degrees and 5 types of desertified land in the Yarlung Zangbo River basin. The area of desertified land is 314.1?104hm2. The desertified land distributes in all over the basin. The development of desertification has caused serious damage in all over the basin and huge economic loss. Desertification in the Yarlung Zangbo River basin is one comprehensive process relating with natural factors and human ones, in which it is the physical factors that play a leading role. The climatic change and human activities have almost equal influence and effect on the development of desertification. It is claimed that the cause of desertification has regional feature. The effective ways of artificial factors on desertification in this region is different from that in the northern China. Artificial factors are not the leading factors yet, their influence is much lower than that in the northern China. The leading way which effects desertification in this region is over grazing, not over reclamation in the northern China. In the Yarlung Zangbo River basin, the influence of over reclamation is only a little.
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    科尔沁沙地东南缘近3000年来植被演化与人类活动
    任国玉
    地理科学. 1999, 19 (1): 42-48.   DOI: 10.13249/j.cnki.sgs.1999.01.42
    摘要   PDF (764KB)

    在科尔沁沙地东南部,以蒙古栎为代表的乔木花粉从3100aB.P.开始显着下降,蒿属和藜科等草本植物花粉逐渐上升,藜科花粉开始上升时间又迟于蒿属花粉。这说明,原来的固定沙丘有一部分首先转化为半固定沙丘,半固定沙丘后来又转变成半流动和流动沙丘。另一方面,科左后旗和辽北地区人口的显着增加始于3100aB.P.前后,此后呈缓慢上升趋势。因此,人类定居和农牧业活动可能是本区沙地疏林减少的基本原因,也是近3000a沙丘演化或沙漠化过程持续增强的主要因子。


    A high resolution pollen record from Maili Bog, Horqin sand land, central Norhteast China, shows that the open sand land forests around the bog have continuously delined since 3100 a B.P., and the main herb taxa have experienced consistent rise in abundance. The most significant changes were in the pollen percentages and pollen concentration of Quercus mongolica, Artemisia and Chenopodiaceae. Furthermore, the changes of the herb pollen generally lagged behind those of trees, and the rise in Chenopodiaceae seems to follow that of Artemisia. It is thus possible that the stable sand dunes covered with open forest were first turned to partly stable sand dunes with Artemisia as the dominant taxa, and this was followed by the change from partly stable sand dunes to mobile sand dunes which usually support only Chenopodiaceae. Archaeological relics and documentary records show an increased human population and agricultural activities in this region beginning from Gaotaishan Culture (3300-3000 a B.P.). The farmers may have come from the southern regions of Liaoning Province, which was in turn influenced by the advanced agriculture of the middle and lower reaches of the Yellow River. The above mentioned vegetation changes in the Maili region, therefore, may have been mainly induced by the human interference with the sand dune system. This inference is generally supported by charcoal count data from the pollen profile, the different changes in pollen between extra region Pinus and intra region Quercus, and pollen data from the other sites in Northeast China. It is thus obvious that caution should be taken when one reconstructs the late Holocene climate changes using pollen data in such a region. It is also suggested that the past reconstruction works of the middle to late Holocene climates in some regions of the country may need to be re assessed.

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    观光旅游地客流时间分布特性的比较研究——以九寨沟、黄山及福建永安桃源洞鳞隐石林国家风景名胜区为例
    张捷, 都金康, 周寅康, 张思彦, 蒋兆刚
    地理科学. 1999, 19 (1): 49-54.   DOI: 10.13249/j.cnki.sgs.1999.01.49
    摘要   PDF (872KB)
    旅游地与主要游客市场的空间结构(距离关系)在相当大程度上影响着游客年内分布、日变化等时间结构。旅游地旅游资源及旅游环境季节性特征也是游客年内分布的决定因子。
    With case samples of three national parks of Jiuzhaigou, Sichuan Province, Mt. Huangshan, Anhui Province and Taoyuandong Lingyin Stone Forest Park, Fujian Province, a comparing study on the temporal distribution of tourist flows to sightseeing tourist destination is presented in this paper. It is suggested that the spatial strucutre (tourist geographical structure) of the dominant tourist originations for a tourist destination play an important role in the formation of temporal distribution (including long term, seasonal and daily distribution) of tourist flow to sightseeing destination. Meanwhile, it is also elucidated that the characters (age, leisure time etc.) of dominant tourist groups and seasonal changes of tourist resources and environment (such as accessibility) of destination effect seasonal pattern of the temporal distribution of tourist flow. Finally, the significance of such research to local sustainable development of a tourist destination was discussed in the paper, too.
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    中国海岛县经济类型划分的研究
    张耀光
    地理科学. 1999, 19 (1): 55-62.   DOI: 10.13249/j.cnki.sgs.1999.01.55
    摘要   PDF (991KB)
    对我国12个海岛县经济类型划分的研究,了解目前海岛县所处不同的经济结构演进阶段,为因岛制宜布局海岛的产业及经济发展过程中产业结构调整提供科学依据。采用海岛县三次产业结构的重心轨迹的变化,动态和定量的分析海岛县三次产业结构的演进过程,从而划分出海岛县经济类型。
    There are more than 6500 coastal islands being up to 500 m2 in the vast sea area of China. The coastline of islands adds up to 1400 km, and the area amounts to 80000 km2. Coastal islands play a very important role in location, resources, national defence, politics and so on. Especially waters around islands are rich in densely distributed marine resources, which is of benefit to developing the economy of coastal islands. With the development of marine resources, coastal islands have made great progress in economy. Through the study on the classification of economic type of 12 coastal island counties in China, we know that they belong to different stages of economic structure, this provides scientific basis for rational distributing industries of coastal island counties according to their local conditions, and also for adjusting their industrial structure in the process of economic development. Applying the method of “three axis map”, we study the dynamic thrack of structure’s core of three sectors of coastal island counties and analyse the development process of their structure of three sectors dynamically and quantitatively, get relatively good results in classifying economic types of coastal island counties.
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    吉林省农业界限温度条件变化规律研究
    马树庆, 袭著香, 安刚, 刘玉英, 王琪
    地理科学. 1999, 19 (1): 63-68.   DOI: 10.13249/j.cnki.sgs.1999.01.63
    摘要   PDF (1432KB)
    用线性回归、相对变率、非整数波及小波周期分析等方法,分析了自有气象记录以来,吉林省不同区域日平均气温稳定≥7℃初日、终日,≥10℃积温及5~9月平均气温之和等几项与农业生产有密切关系的界线温度条件的长期变化特征,揭示了它们的时间变化趋势和周期变化规律,探讨了未来10a内这些条件的可能变化趋势及农业生产问题。
    The change featur and cycles of the agricultural boundary temperature in every region of Jilin province were analyzed by using the linear regression, no integral wave and Wavelet analysis methods. And the change tendency of main agroclimate factors in the future 10 years were analyzed. The main factors include: the first date and final date of air temperature >7℃, stably; the ≥10℃ accumulated temperature, and the air mean temperature from May to Sept. The result shows that the first dates have a shift to an earlier date in the recent half century, and the thermal resources in the agricultural season have a increasing tendency. but the temperature condition has become unsteady in recent years. The first and end date of the limit temperature keep cycles variation with 20, 15 and 9 years, the accumulated temperature and mean temperature keep several cycles variation with 60, 15-16, 9 and 3-4 years. By the year 2010, the warmer period will end in the longer (60 years) climate cycle, and increasing tendency of the thermal resouse and the advance tendency of the seeding time will be subsiding. The future several years in the short cycle, the accumulated temperature should reduce, low temperature calamity and frost should happen frequently, the agricultural actions, such as seeds arranging and seeding period in every region should be adjusted.
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    中原新石器文化与古气候的关系
    陆巍, 吴宝鲁
    地理科学. 1999, 19 (1): 69-72.   DOI: 10.13249/j.cnki.sgs.1999.01.69
    摘要   PDF (826KB)
    讨论了中原新石器时代文化遗址14C年代序列的代表性;分析了新石器古文化与古气候的演变;根据陕西扶风案板遗址(傍龙寺)的孢粉资料,结合冰川前进、冰缘现象等因素,重建了代表中原地区的12~3kaB.P.的古年均气温和古年降水量曲线;又根据古文化与古气候关系的数学模型,进行了数学模拟。认为,在降水量超过500mm(主要因素)时,年均气温超过13℃是关中地区史前古文化繁盛的必要条件。
    In this paper, we shall discuss the relationship between the paleoculture and paleoclimate of the middle of China in Neolithic Age. By means of the data about paleopollen and the glaciers, we give paleoclimate (the temperature and the precipitation) of the middle of China. The temperature about 10 ka B.P. had been same with today, but the precipitation reached present standard until 8 ka B.P. Therefore the Neolithic Culture was began. According to the data of 14C dating in various sites, we give the temporal sequence about the ups and downs of Neolithic Culture in the middle of China. We disscoved the fallowing basic facts. First, the colder climate (Δ t =0℃, Δ t is the temperature difference from today) cause downs of the culture, even ended the sequence of the culture in Neolithic Age. The warmer climate (Δ t =2℃) cause ups of the culture. Second, the colder climate cause the removal of the ancients, and the mixture together among different cultures, thus also cause the birth of new culture. Third, the paleoclimate contraled the development of the culture in Neolithic Age. In this paper, we also give a math model on the relation between the paleoclimate and the paleoculture, and give a result of the simulation.
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    珠江三角洲东部地区常平镇景观组分转移模式及动态变化研究
    曾辉, 唐江, 郭庆华
    地理科学. 1999, 19 (1): 73-77.   DOI: 10.13249/j.cnki.sgs.1999.01.73
    摘要   PDF (539KB)

    对常平镇1988~1996年期间景观组力转移情况和动态变化进程进行了研讨,重点分析非农用建设用地的主要来源,自然和农业组分向城镇转移的基本模式和景观动态变化的主要阶段。研究结果表明,常平镇城镇用地规模不断膨胀的主要来源依次是农田、果园和水体,林地受地形影响,转移量最少;自然和农业组分向城镇转移主要有直接和间接两种模式,直接模式是组分转移的主要方式;全镇过去8年的景观动态变化过程可分3个阶段,即1988~1991年传统农业景观阶段,1992~1994年城乡混合景观阶段和1996年城镇景观阶段。


    Based on multi time remote sensing and landscape pattern analysis, we used transferring matrix as main analyzing tool to study the element transferring condition and landscape changing course of Changping town from 1988 to 1996. The most important problems that we studied were the main source of non agricultural construction area coming from, transferring pattern of natural and agricultural elements to town, and landscape changing stages. The results indicated that 1) most new construction area came from arable land, orchard and water area, the transferring amounts were 1460 ha, 660 ha and 330 ha respectively. Because of geomorphologic impact, there was only 70ha of woodland that was changed to town area. 2) There were two kinds of transferring pattern, direct and indirect, to change natural and agricultural elements to construction area. The direct transferring pattern was the chief changing way, and more than 80% of new increasing town area came from this way. 3) The landscape changing course of Changping town during past 8 years could be divided into three stages, which were agricultural stage (1988 to 1991), town and county mixed stage (1992 to 1994), and town stage(1996). 4) Human disturbance was the driving force of landscape changing in Changping town, and high speed and large changing scale were main characteristics of its landscape dynamics.

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    中国中老年人红细胞压积参考值与地理因素的关系
    葛淼
    地理科学. 1999, 19 (1): 78-81.   DOI: 10.13249/j.cnki.sgs.1999.01.78
    摘要   PDF (814KB)
    海拔高度是影响中国中老年人红细胞压积参考值最主要的因素,随着海拔高度的逐渐增大,中老年人红细胞压积参考值也在逐渐增大,相关性很显着,用逐步回归分析的方法推导出二个回归方程。依据中老年人红细胞压积参考值与地理因素的依赖关系把中国分为青藏区、西南区、西北区、东南区、华北区、东北区等6个区。
    In order to supply a basis for uniting the reference value standard of Chinese adults and old people’s hematocrit, a research is made about relationship between the reference value of Chinese healthy adults and old people’s hematocrit and five geographical factors, which are determined by the way of wintrobe lows. It is found that altitude is the main factor affecting the reference value of Chinese adults and old people’s hematocrit. As the altitude increases gradually, the reference value of Chinese adults and old people’s hematocrit also increases gradually, and the correlation is quite obvious. Applying the method of mathematical regression analysis, two regression equations are given. If geographical values are obtained in some areas, the reference value of Chinese adults and old people’s hematocrit of this area can be reckoned using regression equations. Furthermore, according to the similarity of the reference value of Chinese adults and old people’s hematocrit, taking the altitude as the main dividing basis and considering effects of other geographical factors and population distribution, China can be divided into six regions: Qinghai-Xizang, Southwest, Northwest, Southeast, North and Northeast regions.
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    南京猿人洞石笋年代学研究及其古气候记录
    汪永进, 陈琪, 刘泽纯
    地理科学. 1999, 19 (1): 82-87.   DOI: 10.13249/j.cnki.sgs.1999.01.82
    摘要   PDF (1090KB)
    铀系测年和石笋同位素曲线调谐年代表明,位于南京直立人头骨化石层位之上的一支石笋发育年代为381~166kaB.P.,这一结果反映南京直立人生存时代早于381kaB.P从石笋方解石晶体液相包裹体δD测试结果定量计算了该时段内各冷、暖期的古气温。石笋显微剖面中方解石结晶习性和生长条带的特征揭示了洞穴干湿度的变化。
    230Th/234U ages are determined on one stalagmite from Tangshan Cave in which fossil hominid craniums were discovered previously. The growth interval of the stalagmite suggests that the Nanjing Man fossils were older than 381 ka B.P.. An oxygen isotope temperature record from 381 to 166 ka B.P. has been obtained by combining data on the isotopic composition of calcites with that of fluid inclusions trapped in the stalagmite. The result of the isotope temperature indicates that temperature of the glacial stages were on average about 10℃ lower than those of the interglacial stages. The variations of crystal habits of calcites and laminated bandding on the stalagmite slice could represent dry and humid changes of cave environment. A comparison between the δ18 O curve and a petrographical microsequence of the stalagmite reveals that the several laminae were geochronologically related to the paleoclimatic events. Our study on trace elements of the stalagmite could not support the opinion that Mg/Sr ratio can be used as a proxy indicator for paleoclimate.
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    黄河口清水沟流路的河床演变及其影响
    陈宝冲
    地理科学. 1999, 19 (1): 88-91.   DOI: 10.13249/j.cnki.sgs.1999.01.88
    摘要   PDF (529KB)
    黄河口清水沟流路先后经历了游荡型、顺直型和弯曲型的河床演变阶段。与此同时,河流的冲淤变化经历了摆动淤积、造床冲刷和延伸淤积三个阶段。这些变化对河床纵剖面、水位和险情带来了某些较深刻的影响。
    The Qing Shui Gou Stream into the estuary of the Yellow River experienced the following changing periods: First it began with the wandering channel pattern, then the straight channel pattern, till at last meandering channel pattern. At the same time, the at last meandering channel pattern. At the same time, the scouring and deposition changes of the stram also experienced three periods: 1) the deposition with the channel wandering 2)the scouring which makes the channel formed 3) the deposition which makes the estuary extedn. These changes have some deep effects on the channel longitudinal profiles, the water level and the dangerous situation. The study of these changes and effects is of great instruction to the preventing disasters, the harness and the course change by engineering-measures of the estuary reach of the Yellow River.
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    黄山第四纪泥砾沉积物分形结构特征与沉积环境分析
    周秉根
    地理科学. 1999, 19 (1): 92-94.   DOI: 10.13249/j.cnki.sgs.1999.01.92
    摘要   PDF (441KB)
    黄山第四纪泥砾沉积物粒度组成的分维值介于2.708~2.753之间,非常接近古泥石流堆积物粒度组成的典型分维值2.75.结合沉积特征,表明该类沉积物属第四纪间冰缘环境下的稀性泥石流沉积,其形成过程与季风型冰缘环境有关,是两种环境综合作用的结果。
    The boulder clay of the Quaternary in Mt. Huangshan is distributed mainly at the foot of the mountain and its elevation is 400-800 m a.s.l. The idea on the formation of the sediments have different explanations. In this paper, the author analyses the fractal structure features of the sediments of the Quaternary in Mt. Huangshan based on the fractal theory. The fractal dimension changes from 2.708 to 2.753. The value is very closed to the fractal dimension of the sediments of ancient debris flow (2.75). The fractal dimension of the non cohesive debris flow is over 2.6. So, the sediments of the Quaternary in Mt. Huangshan is ancient non cohesive debris flow. According to the feature of the sediments, the climate was warm and wet during its deposition. The environment of Mt. Huangshan during the glacial epoch of the Quaternary was the periglacial environment of the monsoon type. The ancient non cohesive debris-flow was the sediments of the interperiglacial environment of the monsoon type. Its formation had relationship with the perigalcial environment of the monsoon-type.
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