区域群发性滑坡灾害概率预报系统   总被引：7，自引：0，他引：7  

李长江  麻土华  朱兴盛  唐小明 《国土资源信息化》2005,(4):32-38

根据覆盖浙江全部陆地区域数年降雨量数据,在同时期内有明确日期、位置记录的609处滑坡(泥石流)灾害数据,通过对地质、土壤、土地利用类型、人文等资料的综合分析,研制了集GIS与ANN于一体的区域群发性滑坡灾害概率预报系统(LAPS)。该系统可以通过宽带网络与气象、水文观测等有关部门相连接,在雨季根据雨量观测站的实时观测数据和降雨预报,对全省区域范围内滑坡灾害发生概率进行快速评价,实现对灾害发生的空间范围、强度及其分布概率的实时预警预报,具有维护方便、操作简单、可视化强等特点,可以作为其它滑坡易发地区的预报系统原型。  相似文献   

Notes　on　Extended-Range　Atmospheric　Prediction　in　the　Northern　Hemisphere　Winter     

Shingo Yamada Forecast Division  Japan Meteorological Agency  Tokyo    Japan Shuhei Maeda Administration Division  Climate  Marine Department  Japan Meteorological Agency  Tokyo    Japan K. Gambo c/o Department of Earth  Planetary Physi 《大气科学进展》1997,(1)

ＮｏｔｅｓｏｎＥｘｔｅｎｄｅｄ－ＲａｎｇｅＡｔｍｏｓｐｈｅｒｉｃＰｒｅｄｉｃｔｉｏｎｉｎｔｈｅＮｏｒｔｈｅｒｎＨｅｍｉｓｐｈｅｒｅＷｉｎｔｅｒＳｈｉｎｇｏＹａｍａｄａＦｏｒｅｃａｓｔＤｉｖｉｓｉｏｎ，ＪａｐａｎＭｅｔｅｏｒｏｌｏｇｉｃａｌＡｇｅｎｃｙ...  相似文献   

Nitrogen Removal in Wastewater Irrigation Systems and Its Influence on Groundwater Pollution     

Wang Min Wu Yongfeng Tang Minggao Zhong Zuoxin Shen ZhaoliHydrogeological Department  China University of Geosciences  Beijing 《中国地质大学学报(英文版)》1995,(2)

The experiment included ten soil columns and field investigation in 1-2 year duration. Data on the columns continuously flooded with waste water indicated that when total input of NH_4-N reached to above 70％ of the NH_4-N adsorption capacity in soil the breakthrough would appear in the output . Adequate removal of nitrogen from the waste water would require at least 170 cm deep groundwater table . Fine textured soil would promote denitrification . The columns simulating discontinuous waste water irrigation indicated that denitrification existed only in the partial microenviroument of reduction . Groundwater table depth had no strong influence on nitrogen removal . The investigation in field revealed that the groundwater recharged with waste water was not polluted by nitrogen when the aeration profile was in finer textures owing to the combined contribution of nitrification and denitrification.  相似文献   

四川省矿区地质环境评价系统空间数据库设计     

何勇  辜寄蓉  江浏光艳 《国土资源信息化》2006,(6):2-5

四川省矿区地质环境评价系统空间数据库采用面向对象的Geodatabase地理数据模型,通过ArcSDE空间数据引擎连接,把空间数据都存储在关系数据库Oracle 9i中。结合矿区基础地理数据与矿山环境、地质灾害、基础类、地质等专题数据,构建核心矿区空间地理信息框架和基于B/S和C/S的系统,实现有效地存储、管理和发布四川省各地矿区研究中所获得的大量宝贵的资料。  相似文献   

通告：网上投稿请认准www.geojournals.cn/georev     

编辑部 《地质论评》2015,61(5):61051006-61051006

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ALEXANDRITE AND ITS POPULARITY AS A GEM-STONE IN NORTH CHINA     

何杰 《地质学报》1924,3(2)

INTRODUCTION. The reason for having this short paper made public is not so much as to unfold the results of any scientific investigation on the subject matter, but rather as a direct outcome of the response to the repeated inquiries, set  相似文献   

Effect of Wave Groups on Wave Run-up     

Zhou Jiabao  Zhang Jiachang Senior Engineer  River  Harbour Department  Nanjing Hydraulic Research Institute  Nanjing 《中国海洋工程》1992,(1)

-The effect of wave group on wave run-up on a slope dike is mainly discussed in this paper. Two simulating methods of wave group and their applications in laboratory are introduced. Synthesizing the research results of wave run-up on a slope dike, the effect of wave group on wave run-up on a slope dike in coastal protection engineering is studied as the main point.  相似文献   

Computational Techniques of 2D Tidal Flow in Estuaries and Bays   总被引：1，自引：0，他引：1  

Xin Wenjie Senior Engineer  River  Harbour Department  Nanjing Hydraulic Research Institute  Nanjing 《中国海洋工程》1995,(4)

- Some problems in the numerical calculation of tidal flow in estuaries and bays, such as distribution bed roughness, relationship between model moving boundary and water volume balance, remedy of certain shortage under open boundary conditions, smooth transfer of the controlling message for the inner boundaries of nested model, can not be solved usually by means of the fundamental equations and computing mode adopted in the numerical model, but can be done by the measures which not only satisfy the physical features but also are convenient for operation. Based on the calculated samples of some areas of Modaomen, Lingdingyang and Huangmaohai of the Pearl River Estuary, and Shuidong Bay (a typical barrier- lagoon tidal channel) in Guangdong Province, method and process of calculation for the above mentioned problems are briefly presented in this paper.  相似文献   

Computation of Diffraction of Irregular Waves Behind Single Jetty   总被引：1，自引：0，他引：1  

Yao Guoquan  Ma Zhixiong  Ding Bingcan Senior Engineer  River  Harbor Department  Nanjing Hydraulic Research Institute  Nanjing Assistant Engineer  River  Harbor Department  Nanjing Hydraulic Research Institute  Nanjing 《中国海洋工程》1991,(3)

- This paper presents a calculation method for the diffraction of both regular waves and irregular waves of the single directional frequency spectrum behind a single jetty with a theoretical analysis, which has been confirmed through the model experiments, derives a method of computing the diffracted irregular waves behind the single jetty with the theoretical analysis on the basis of computation of the field data and gives the formulas and the figures of the computation of wave diffractions behind the vertical wall or mound single jetties.  相似文献   

Unified Water Gravity Wave Theory and Improved Linear Wave   总被引：2，自引：0，他引：2  

Fu Yuhua Senior Engineer  Structural Engineering Department  China Offshore Oil Development  Engineering Corp.  Beijing 《中国海洋工程》1992,(1)

- Based on Least Square Method, this paper presents variational principle for handling various water gravity wave theories and the unified water gravity wave theory was given. By using this variational principle of unified water wave theory, two kinds of improved linear waves were derived. The first one uses the same boundary conditions which were applied to derive 5-order Stokes wave. The second one uses the accurate boundary conditions (Eqs. 11 and 12). The two improved linear waves were compared with the existing linear wave.  相似文献