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Integrated modeling environment and a preliminary application on the Heihe River Basin, China

Science China(Technological Sciences) 2011年第8期54卷 2145-2156页

作者： NAN ZhuoTong SHU LeLe ZHAO YanBo LI Xin DING YongJian Cold and Arid Regions environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China

environmental and water issues are essentially complex interdisciplinary problems. Multiple models from different disciplines are usually integrated to solve those problems. Integrated modeling environment is an effective technical approach to model integration. Although a number of modeling environments worldwide are available, they cannot meet current challenges faced. Their old-fashion designs and original development purposes constrain their possible applications to the domain of hydrologic or land surface modeling. One of the challenges is that we intend to link knowledge database or ontology system to the modeling environment in order to make the modeling support more intelligent and powerful. In this paper, we designed and implemented an integrated modeling environment (HIME) for hydrological and land surface modeling purpose in a much extendable, efficient and easy use manner. With such design, a physical process was implemented as a module, or component. A new model can be generated in an intuitive way by linking module icons together and establishing their relationships. Following an introduction to the overall architecture, the designs for module linkage and data transfer between modules are described in details. Using XML based meta-information, modules in either source codes or binary form can be utilized by the environment. As a demonstration, with the help of HIME, we replaced the evaporation module of TOPMODEL with the evapotranspiration module from the Noah land surface model which explicitly accounts for vegetation transpiration. This example showed the effectiveness and efficiency of the modeling environment on model integration.

关键词： modeling environment the Heihe River Basin TOPMODEL Noah LSM

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Geographic analysis-oriented Virtual Geographic environment:Framework,structure and functions

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Science China Earth Sciences 2011年第5期54卷 733-743页

作者： LU GuoNian Key Laboratory of VGE Ministry of Education Nanjing Normal University Nanjing 210046 China

Previous research on the Virtual Geographic environment （VGE） has focused mainly on representation rather than geographic analysis. However, geographic analysis plays a significant role in modem geography. To address this issue, this paper systematically examines theories and implementing VGE techniques that support geographical analysis and simulation. Based on its framework, VGE can be divided into four subtypes. These are the data environment, modeling environment, expression environment, and collaborative environment. The functions and key techniques of each are examined, and some case studies are discussed. This study provides direction for necessary new developments of advanced VGE platforms.

关键词： VGE data environment modeling environment expression environment collaborative environment

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