GIS-based hydrogeological databases and groundwater modelling   总被引：4，自引：2，他引：2  

Radu Gogu  Guy Carabin  Vincent Hallet  Valerie Peters  Alain Dassargues 《Hydrogeology Journal》2001,9(6):555-569

Reliability and validity of groundwater analysis strongly depend on the availability of large volumes of high-quality data. Putting all data into a coherent and logical structure supported by a computing environment helps ensure validity and availability and provides a powerful tool for hydrogeological studies. A hydrogeological geographic information system (GIS) database that offers facilities for groundwater-vulnerability analysis and hydrogeological modelling has been designed in Belgium for the Walloon region. Data from five river basins, chosen for their contrasting hydrogeological characteristics, have been included in the database, and a set of applications that have been developed now allow further advances. Interest is growing in the potential for integrating GIS technology and groundwater simulation models. A "loose-coupling" tool was created between the spatial-database scheme and the groundwater numerical model interface GMS (Groundwater Modelling System). Following time and spatial queries, the hydrogeological data stored in the database can be easily used within different groundwater numerical models. Electronic Publication  相似文献   

工程地质学一个新的研究方向   总被引：14，自引：0，他引：14  

杨志法  王思敬 《地质灾害与环境保护》1996,7(1):1-7

本文认为，通过工程地质力学与系统科学的有机结合而形成的工程地质力学综合集成理论和方法，将成为当今工程地质学的重要研究方向之一。本文简述其基本原理、一般方法及实际工程应用等问题。  相似文献   

Fly-in/Fly-out and Fly-over: Mining and regional development in Western Australia     

Keith Storey 《The Australian geographer》2001,32(2):133-148

Adoption of fly-in/fly-out (FIFO) or commute work systems in the Western Australian mining industry has increased rapidly over the last decade, with metropolitan Perth becoming the main source of labour and the base for major mining supply and service companies in the state. This situation has led to increasing concern on the part of many regional authorities about the loss of local benefits through 'fly-over' effects, and implications for regional development in their smaller resource-based communities. To date, the state government has paid little attention to these issues, but, at the same time, the regions have done relatively little to help themselves. The paper explores the reasons for the growth of this work system, the nature of the regions' concerns, the measures taken to address them, and options for future action.  相似文献   

集合预报系统及其产品应用综述   总被引：3，自引：0，他引：3  

林良勋 《广东气象》2001,(2):44-46

本文简要介绍了数值天气预报的一个重要分支——集合预报系统的研究背景，开发研究思路，集合预报产品输出的形式，集合预报输出的处理和统计解释，以及国外应用集合预报的情况。作为一项新的预报技术，集合预报将越来越受到重视。  相似文献   

渭河盆地的地质构造与构造地貌类型   总被引：4，自引：1，他引：3  

胡孟春 《地理研究》1989,8(4):56-64

渭河盆地位于祁吕系、秦岭纬向构造体系,华夏系、陇西旋卷构造四大构造体系交汇地带,这种地质构造背景是形成盆地构造地貌的基础。按照构造-成因分类原则,对本区构造地貌划分为两级8个类型,又按新构造运动特点划分出相应的亚类。这些地貌类型分布具有东西延伸成带,南北对应,垂向成层具阶梯状的空间配置特点。渭河盆地在四大构造体系制约下,共地堑构造是决定地貌空间配置的主要原因。  相似文献   

Overview of the EUROSAM project and a Decision Support System   总被引：1，自引：0，他引：1  

S. L. Brown  R. Cox  E. Feunteun  S. Thorin  J. C. Lefeuvre 《Continental Shelf Research》2003,23(17-19):1617

The EUROpean SAlt marshes Modelling (EUROSAM) project is part of the Thematic Network European Land–Ocean Interaction Studies programme. The main aims of the EUROSAM project were to fill in some of the main gaps in the understanding of ecological processes, to integrate this knowledge into models to predict the likely response of salt marsh ecosystems to environmental changes, and to make the knowledge available to decision-makers. Research work and model development for the project were carried out by researchers in France, Portugal, the Netherlands, and England, and included studies on sediment dynamics and interactions with vegetation, plant population dynamics and genetics, models of organic matter production and cycling, studies of animal communities, food webs and organic matter fluxes, and development of hydrodynamic models at different scales: salt marsh, bay, and estuary.This paper describes the main aims and outputs of the EUROSAM project, and the incorporation of the findings and models into a prototype Decision Support System (DSS). The EUROSAM DSS is designed as a guide for the non-specialist to understand the important role and functioning of salt marshes, and for use as a management tool. Example scenarios were selected from the work within the project to illustrate the interactions between components of the salt marsh–mudflat ecosystem, and the potential impact of human activities and environmental change on the salt marsh system.  相似文献   

潜江盐湖盆地层序地层特征   总被引：11，自引：0，他引：11       下载免费PDF全文

方志雄  陈开远  杨香华  黄春菊 《盐湖研究》2003,11(2):14-23

盐湖沉积不仅是一种重要化工矿产沉积建造 ,还是一种重要的含油气沉积组合 ,其中常常蕴藏有十分丰富的油气资源。但是 ,此类盆地的层序地层学研究起步较晚 ,尤其是对于陆相盐湖盆地更是如此 ,其关键在于国内外的专家学者对盐湖层序的划分与特征了解较少 ,层序地层划分标准不统一。在充分吸收和消化前人研究成果的基础上 ,从当今的盐湖形成理论出发 ,以潜江古盐湖为研究对象 ,讨论了盐湖盆地沉积的层序地层划分标准 ,及层序地层单元基本特征。认为从层序地层的基本控制因素———可容纳空间 (Accommo dationSpace)出发 ,可将盐岩沉积作为盆地水体浓缩的产物———水面下降阶段的沉积代表 ,从而建立起盐湖的层序地层划分标准。  相似文献   

中纬度中尺度对流系统研究的若干进展   总被引：20，自引：34，他引：20  

程麟生  冯伍虎 《高原气象》2002,21(4):337-347

中尺度对流系统（MCSs)与许多严重的气象灾害，特别是我国的暴雨洪涝密切相关。本文主要对中纬度中尺度对流系统研究的若干进展作了简要综述，其中包括：MCSs的时空分布；MCCs的平均生成环境；MCSs的组织模型和逆尺度演变；发展中的MCSs与其环境的相互作用；MCSs的动力学和不稳定度；MCSs的数值模拟；MβCS和MγCS的观测和模拟；MCSs的概念模型；MCSs的结构和机制研究的观测计划。我们希望通过本文有助于进一步了解有关中纬度MCSs的发生、发展、结构、机制以及概念模型等研究的若干进展。  相似文献   

Web-enabled spatial decision analysis using Ordered Weighted Averaging (OWA)   总被引：3，自引：0，他引：3  

Claus Rinner  Jacek Malczewski 《Journal of Geographical Systems》2002,4(4):385-403

 This paper presents a spatial decision support tool that implements the Ordered Weighted Averaging (OWA) method. OWA is a family of multicriteria evaluation operators characterised by two sets of weights: criterion importance weights and order weights. We propose a highly interactive way of choosing, modifying, and fine-tuning the decision strategy defined by the order weights. This exploratory approach to OWA is supported by a graphical representation of the operator's behaviour in terms of decision risk and tradeoff/dispersion between criteria. Our prototype implementation is based on the CommonGIS software, and thus, Web-enabled and working with vector data. We successfully demonstrate online, exploratory support of spatial decision strategies using a data set of skiing resorts in Wallis, Switzerland. Received: 24 September 2002 / Accepted: 10 January 2003  相似文献   

Foredeep submarine fans and forebulge deltas: orogenic off-loading in the underfilled Karoo Basin   总被引：1，自引：0，他引：1  

O. Catuneanu  P. J. Hancox  B. Cairncross  B. S. Rubidge 《Journal of African Earth Sciences》2002,35(4)

Third-order sequence stratigraphic analysis of the Early Permian marine to continental facies of the Karoo Basin provides a case study for the sedimentation patterns which may develop in an underfilled foreland system that is controlled by a combination of supra- and sublithospheric loads. The tectonic regime during the accumulation of the studied section was dominated by the flexural rebound of the foreland system in response to orogenic quiescence in the Cape Fold Belt, which resulted in foredeep uplift and forebulge subsidence. Coupled with flexural tectonics, additional accommodation was created by dynamic loading related to the process of subduction underneath the basin. The long-wavelength dynamic loading led to the subsidence of the peripheral bulge below base level, which allowed for sediment accumulation across the entire foreland system.A succession of five basinwide regressive systems tracts accumulated during the Artinskian (5 My), consisting of foredeep submarine fans and correlative forebulge deltas. The progradation of submarine fans and deltaic systems was controlled by coeval forced and normal regressions of the proximal and distal shorelines of the Ecca interior seaway respectively. The deposition of each regressive systems tract was terminated by basinwide transgressive episodes, that may be related to periodic increases in the rates of long-wavelength dynamic subsidence.  相似文献