浙江仙居风景名胜区开发地质公园可行性探讨     

王永  姚辉磊  杜旭 《地质灾害与环境保护》2007,18(4):43-46

仙居风景名胜区位于浙江省仙居县的中南部,本文介绍了仙居风景名胜区地质遗迹资源的基本状况,分析了拟建仙居风景名胜区省级地质公园具备的优势,以及建立地质公园的科研价值、社会经济和文化价值,认为仙居风景名胜区独特的地质遗迹景观符合省级地质公园的标准,建立省级地质公园是可行的,并为申报省级地质公园的工作提出了建议.  相似文献   

SEDIMENTS OF THE NORTH CHINA RIVERS AND THEIR GEOLOGICAL SIGNIFICANCE or A QUANTITATIVE STUDY OF THE PHENOMENA OF EROSION AND DEPOSITION IN NORTH CHINA     

翁文灝 《地质学报》1931,(1)

Ⅰ. SILT OF THE PRINCIPAL RIVERS IN NORTH CHINA. Early observations of the Huangho silt: —Although much has been said about the heavy silt burden of the Yellow River, yet exact data are very scanty  相似文献   

THE SEARCH FOR EARLY MAN IN CHINA     

W.H.WONG 《地质学报》1927,(Z1)

The first indication of the existence of early man in North Chinawas announced by Prof. Max Schlosser of Munich, Germany, who in hiswork "Die fossilen Saugethiere Chinas" in 1903 briefly described a posteriormolar tooth of Homo? or Anthropoid? gen. et sp. undetermined. The possibilityof its being Tertiary was suggested. The material was bought in Peking.  相似文献   

A model study of influence of circulation on the pollutant transport in the Zhujiang River Estuary and adjacent coastal waters   总被引：1，自引：1，他引：1  

WONG Lai Ah  GUAN Weibing  CHEN Jay-Chung  SU Jilan 《海洋学报(英文版)》2004,23(2):225-237

A tracer model with random diffusion coupled to the hydrodynamic model for the Zhujiang River Estuary (Pearl River Estuary, PRE) is to examine the effect of circulations on the transport of completely conservative pollutants. It is focused on answering the following questions: (1) What role does the estuarine plume front in the winter play in affecting the pollutants transport and its distribution in the PRE? (2) What effect do the coastal currents driven by the monsoon have on the pollutants transport? The tracer experiment results show that: (1) the pollutant transport paths strongly depend on the circulation structures and plume frontal dynamics of the PRE and coastal waters; (2) during the summer when a southwesterly monsoon prevails, the pollutants from the four easterly river inlets and those from the bottom layer of offshore stations will greatly influence the water quality in Hong Kong waters, however, the pollutants released from the four westerly river-inlets will seldom affect the water quality of Hong Kong waters due to their transport away from Hong Kong; (3) during the winter when a northeasterly monsoon prevails, all pollutants released from the eight river gates will be laterally transported seaward inside the estuary and transport westward in the coastal waters along the river plume frontal zone. However, pollutants released from the surface layer of offshore stations near or east of the Dangan Channel will be carried into the coastal waters of Hong Kong by the landward component of the westward coastal current driven by the winter northeasterly monsoon. But the pollutants from the bottom layer of the offshore stations will be carried away from the offshore by the bottom flow driven by the northeasterly monsoon. This implies that only surface-released matter from offshore stations will affect the water quality of the coastal waters around Hong Kong during the winter when a northeasterly monsoon prevails.  相似文献   

近20年来我国村落形态研究的回顾与展望     

车震宇  翁时秀  王海涛 《地域研究与开发》2009,28(4)

近20年来村落形态的定义数量不多,含义不一致,且不够严谨,其研究主要在村落形态类型、影响因素、演变机制、空间结构等方面出现了较多成果。研究方法突破了原有的描述性、定性分析,新的研究方法和手段被引入。村落形态研究不足之处体现在理论研究较少,理论与应用的结合不够;单项研究较多,综合研究较少;宏观研究较多,微观研究缺乏等方面。未来村落形态研究应在以下5个方面拓展:厘清基本概念,建立概念体系;村落形态类型研究应当向纵深发展;应从系统论和整体论的角度研究形态演变机制;建立研究规范,重视研究成果的交流,注重从案例中提炼理论;加强新方法的应用。  相似文献   

The spatial dynamics of foreign investment in the Pearl River Delta, south China   总被引：1，自引：0，他引：1  

JIANFA SHEN  KWAN-YIU WONG  KIM-YEE CHU  ZHlQlANG FENG 《The Geographical journal》2000,166(4):312-322

The Pearl River Delta region in south China has experienced dramatic economic development, industrialization and urbanization since the late 1970s. Foreign investment, especially the capital from Hong Kong, has been one of the major driving forces underlying the process. The spatial concentration/diffusion of foreign investment in a region also has important bearing on the balanced/unbalanced urban and regional development. This issue remains unexamined and critical analysis is needed to unveil the spatial impacts of foreign direct investment (FDI) activities in China. This paper will focus on the Pearl River Delta region to examine the spatial diffusion and the determinants of foreign investment. The diffusion of foreign investment from the provincial capital, Guangzhou and two special economic zones near Hong Kong to surrounding areas is clearly identified. The diffusion is the result of the widespread implementation of open-door policy in the region and significant improvement in infrastructure. Four models of foreign investment are developed to explain the spatial incidence of foreign investment in the region. The findings of this paper can shed light on the regional development process in China and other developing countries under the influence of foreign capital.  相似文献   

改革开放以来广东省空间极化研究   总被引：50，自引：7，他引：43  

甄峰  顾朝林  沈建法  黄钧尧  朱剑如 《地理科学》2000,20(5):403-410

改革开放２０年来广东省的空间结构演化表明：传统的核心－边缘模式已发生了很大的变化,区域出现多极化且次级核心区形成。广州华南中心城市的地位已经被香港所取代,韶关、湛江、汕头、潮阳等老中心城市地位不断下降,深圳、珠海、东莞、中山、顺德、南海和番禺等新兴城市正发展成为新区域增长中心。珠江三角洲经济发展开始向外围地区扩展,出现了反极化的趋势。全省空间差异扩大,形成了多层次的空间极化格局。  相似文献   

An analytical study on the second-order resonance system of tide in an ideal partially-enclosed bay     

WONG Lai Ah  DONG Lixian  CHEN Jay Chung  SU Jilan 《海洋学报(英文版)》2005,24(5):1-13

In the numerical studies of a real tide M4 resonance system, the Xiangshan Port which is a partially-closed bay, Dong et al. [1999. Acta Oceanologica Sinica, 21 （3）： 1-6] found the interesting phenomenon that the advection plays an important role in inhibiting the growth of the amplitude of the tidal second-order resonance response （M4）. This result is contrary to the general traditional ideas for a non-resonance system. How this phenomenon is interpreted and what internal mechanism is behind the phenomenon are the main focuses of this study. The followings are examined： （1） the dynamic features of a second-order resonance system of tide; （2） the dominating factors on the second-order resonance responses; （3） the effects of both the friction and the advection on the second-order resonance responses; and （4） their roles in dominating the second-order resonance response and internal mechanisms by using the analytical methods. The respective results show that： （1） Both the bottom friction and the advection play significant roles in dominating the magnitude of the amplitude of the second-order resonance responses; （2） the effect of the friction on the second-order resonance response depends on the distribution ratio of the work-done of the system to friction force exhausted into between the damping of the first-order system and the inner excitation of the second-order system; （3） the advection plays a positive role in increasing the amplitude of the second-order non-resonance response in the second order non-resonance of tide; （4） in a second-order resonance system of tide, the effect of the advection may be either to increase or to decrease the amplitudes of the second-order resonance responses of tide, which depends on the distribution ratio mentioned above.  相似文献   

TECHNICAL NOTE Time of concentration formulae for planes with upstream inflow     

TOMMY S. W. WONG 《水文科学杂志》2013,58(5):663-666

Abstract

Due to changes in physical characteristics, the valley side of a drainage basin may be represented by a series of overland planes. In such a situation, the downstream outflow from one plane becomes the upstream inflow for the subsequent plane. Based on the kinematic wave equations, two time of concentration (time to equilibrium) formulae are derived for planes subject to uniform rainfall excess and with a constant upstream inflow. For practical applications, the formulae are further developed in terms of the Manning resistance coefficient. The derived formulae are all consistent with those published for the case of zero upstream inflow.  相似文献   

高孔隙岩石变形的离散单元模型   总被引：5，自引：0，他引：5       下载免费PDF全文

王宝善  陈颙  葛洪魁  宋丽莉  WONG Teng-Fong 《地球物理学报》2005,48(6):1336-1342

实验和野外观测表明颗粒破碎显著影响高孔隙岩石的变形特征.为建立高孔隙岩石变形的数值模型,我们以弹性理论为基础并根据问题的特征进行合理简化,给出了一种颗粒破碎机制,并根据此颗粒破碎条件改进传统的离散单元模型.利用改进的离散单元模型,研究了不同压力条件下高孔隙岩石变形的宏观和微观特征.数值模拟结果表明考虑颗粒破碎的模型能重现高孔隙岩石在不同围压下变形的应力-应变关系、声发射特征、应变局部化和剪切增强压缩等特征.我们还发现,与野外观测结果一致,在高孔隙岩石脆性阶段剪切带内部及附近伴有显著的颗粒破碎.  相似文献