• 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引(EI)收录期刊

1996 Vol. 7, No. 4

Display Method:
Framework and Design of the Yangtze River Flood Control Decision Support System
Hu Siyi, Song Dedun, Wu Yongxiang, Cui Xinmin, Zou Ying, Shen Fuxin, Wang Yintang, Dai Xing
1996, 7(4): 283-294.
Abstract:
Based on the experience and existing decision-making procedures of flood control on the middle Yangtze River, a framework-design for developing the Yangtze River flood control decision support system (YRFCDSS) has been proposed, featuring by an appropriate system structure, advanced software design, excellent problem-solving abilities, good extensibility and compatibility to keep up with technical changes, and suitability for an efficient and flexible real-time management. The paper out lines an approach and some guidelines for developing YRFCDSS. The logic structure of the system was determined as follows: under supports of a data base and a knowledge base, the entire operational environment for the system was set up through the main control programs, realizing two main functions of in teractive information providing and flood control system simulation. To build YRFCDSS effectively, some key-techniques including GIS, graphical user interface, model managers, and other advanced human-computer in teraction were also addressed.
Yangtze River Flood Control Decision Support System——Flood Control Decision Risk Analysis
Zhu Yuansheng, Shen Fuxin, Huang Zhenping, Liu Zhizhong, Huang Daoxi
1996, 7(4): 295-304.
Abstract:
In this paper some main risk factors are sifted with in the flood control decision process for the middle reach of the Yangtze River. The risk analysis models are set up for flood control decision considering the following three kinds of information: historical data of rainfall and flood, short-term forecasting of water stage as well as mid-and-long term forecasting of rainfall and flood. In addition, the quantitative descriptions are given for various flood control plans of whether to use the flood diversion areas or flood storage areas in the flood control system of the Yangtze River reach between Three Gorges and Loushan.
1996, 7(4): 304-304.
Abstract:
Yangtze River Flood Control Decision Support System——Total Control Management and Interactive User Interface
Wu Yongxiang, Dai Xing
1996, 7(4): 305-312.
Abstract:
The development of the total control management and in teractive user interface is discussed in the paper, taking the Yangtze River Flood Control Decision Support System (YRFCDSS) for an example. The content of the total control management and the technique of software integration between it and other subsystems are first in troduced, and the solution of technique nodus is presented. The processing means of the space and at tribute data based on the technolory of GIS is described, and the design and development method of the interactive user interface based on the GUI is discussed. Finally, the graphics processing and graphics oriented operation based on the electronical map are discussed in detail.
Yangtze River Flood Control Decision Support System——Flood Control Decision Case Management System
Wu Yongxiang, Dai Xing
1996, 7(4): 313-318.
Abstract:
This paper puts forward the design of the Flood Control Decision Case Management System (FCDCMS) based on the analysis of the characteristic of flood control decision making. Taking the Yangtze River Flood Control Decision Support System (YRFCDSS) for an example, the paper describes some decision case management methods, such as creating new case, deleting old case, selecting the case, selecting the model in the case, setting the model parameter, running the model, displaying the result of model, getting the case description, comparing the result of many cases, and so on. Meanwhile, the technique of development is expounded in the paper.
Yangtze River Flood Control Decision Support System——Database and Information Query System
Cui Xinmin, Xu Xiaomin, Huang Ju
1996, 7(4): 319-325.
Abstract:
The work is a part of the study on the Yongtze River Flood Control Decision System. According to the special requirement of the project, the character of the Database and Information Query System of Decision Support System for the flood control and research methods are carefully analyzed, the advanced method of system development and visual program making software are used for this purpose. The Database of Water Regime and Water Resources Projects are established on the Windows Workstation in microcomputer, the part of the Information Query System is designed, and the program is made. The Database and Information Query System developed are such subsystem that they can be used for a large number of data and complicated relationship in the data. The data formats are in conversion and the constructions of these systems are reasonable. These subsystem are easy to use, maintain and extend.
Yangtze River Flood Control Decision Support System——Flood Control Knowledge Base Subsystem
Zou Ying, Jin Guanseng
1996, 7(4): 326-330.
Abstract:
The flood control decision is a very complicated decisive thought activity. It is not noly supported by a vast amount of data-information, but also by a large number of text-information. On the base of analysing the requirement for the text-information in the process of making flood control decision, we widely collect variable relative text-information, make the classification of the information, and determine the stucture system of the information for flood control knowledge base. After that, with the help of on line Windows Help function, we develop Yangtze River Flood Control Knowledge Base Subsystem. The subsystem possesses the features of user-interface friend and easy operating. It can supply convenient and quick text-information support for flood control decision-makers.
Real-Time Optimal Operation Models for the Three-Gorge-Reservoir-Centered Yangtze River Flood Control System
Tan Peilun
1996, 7(4): 331-335.
Abstract:
This paper provides a general review on mathematical models of optimal operation for the Three-Gorge-Reservoir-centered Yangtze River flood control system, divided into two parts—one dealing with flood routing simulation models and the other with optimal joint operational models for the reservoirs. The former including a hydrologic routing model, an 1-D unsteady flow model (from Yichang to Wuhan), an 1-D and 2-D hybrid unsteady flow model, and a 2-D rounting model for flood-divisions and flood-plains, is used to simulate dynamic processes of flood routing and effects of flood mitigation measures in the system, the latter consisting of an overall-control models and models of Fuzzy decision-making, large-scale system decoupling and network flows, is applied to determine optimal operational strategies for the reservoirs, to gain maximum flood control benefits.
Flow Modelling of the Middle Yangtze River Dongting Lake Flood Control System——Ⅰ.Modelling Procedures and Basic Algorithms
Tan Weiyan, Hu Siyi, Wang Yintang, Xu Chenglong, Zhong Zhiyu, Hu Weizhong
1996, 7(4): 336-345.
Abstract:
For the large-scale flood control system of the middle Yangtze River-Dongting Lake, featuring by complex flow conditions, data scarcity, and a limited lead time, a hierarchical and modular flow simulation model has been proposed, combining together 1-D with 2-D flow models, hydraulic with hydrologic methods, numerical algorithms with supplementary information. A finite-volume method for calculating 2-D unsteady flows on an unstructured mesh is used for the lake of a complex configuration, to preserve mass balance. A conservative explicit difference scheme is applied to simulate branched and looped network unsteady flows, to avoidtedious matrixcal culations caused by using implicit schemes, and facilitate the 2-D model and various flow connections. This hybrid unsteady flow model has been utilized to flood routing for the system connected through sub-lakes, river networks, and flood-plains.
Flow Modelling of the Middle Yangtze River-Dongting Lake Flood Control System——Ⅱ Model Building, Calibration and Verification
Hu Siyi, Wang Yintang, Tan Weiyan, Zhong Zhiyu, Xu Chenglong, Hu Weizhong
1996, 7(4): 346-353.
Abstract:
Based on the modelling procedures and basic algorithms for the middle Yangtze River-Dongting Lake flood routing model, this paper discusses some essential problems arisen in the process of model building, including special treatments of inner-and outer-boundary conditions, applications of real-time flood forecast-corrector models, data manipulation, and determination of model parameters. Special attention was paid to matching these arts with basic algorithms. The observed data of two flood events were used for model calibration and verification respectively. The results showed that dynamic processes of flood routing were clearly rebuilt, and appropriate general patterns of water levels and flow velocities or discharges were obtained, illustrating the merits of this model.
Hydrologic Flood Routing Model for the Middle and Lower Yangtze River
Zhong Ziyu, Xu Chenglong, Hu Weizhong
1996, 7(4): 354-360.
Abstract:
In this paper, amathematicalmodelof flood routing for Three-Gorge-Reservoir-centered flood control system is developed.The system is decoupled into two subsystems, namely the upper-dam-site subsystem and the dam-site-Hukou sub system,according to its nature.The flood routing is carried outw ith hydrology methods. Testedw ith observed data of 1981 and 1983 flood events, it appears that the model holds satisfactory accuracy.The model also has advantages over past modelswith the introduction of computer-aided techniques.
Analysis and Calculation of Diversion Risk
Chen Fenglan, Wang Changxin
1996, 7(4): 361-366.
Abstract:
The diversion project is a risky work. Therefore, quantifying uncertainties involved in diversion project is helpful to the choice of design flood and diversion alternative.In this paper, the JC method is used to perform the diversion risk analysis.The effect and importance of the uncertainties on total risk of diversion project for hydraulic parumeters are analysed.
Study on the Water Resources Assessment Indexes System
Zuo Dongqi, Dai Shusheng, Yuan Ruhua, Li Hongye, Rui Xiaofang
1996, 7(4): 367-374.
Abstract:
On the basis of reviewing the water resources assesgn ent research in the last two decades, the paper remarks several inportant problems to be further investigated and puts forward a proposal of building up a system of appraisal indices. This paper introduces the initial results of a group's research. A fairly sinple system,including relatively all-round naturogeographical and engineering-economical characterictics, features and their regimes, is provided to evaluate the level of utilization availability and sufficientness to meet the human dem and of water resources for a definite district. Two operating methods were applied and recommended to judge the water resources of 7 representative counties selected from different corners of China as illustrating examples.
1996, 7(4): 375-380.
Abstract: