The 3rd ISPRS Workshop on Dynamic and Multi-Dimensional GIS & the 10th Annual Conference of CPGIS on Geoinformatics

Chen, Jun

Bibliographic data

Monograph

Persistent identifier:: 856566209

Author:: Chen, Jun

Title:: The 3rd ISPRS Workshop on Dynamic and Multi-Dimensional GIS & the 10th Annual Conference of CPGIS on Geoinformatics

Sub title:: May 23 - 25, 2001, Bangkok, Thailand

Scope:: VI, 434 Seiten

Year of publication:: 2001

Place of publication:: Pathumthani, Thailand

Publisher of the original:: AIT

Identifier (digital):: 856566209

Illustration:: Illustrationen, Diagramme, Karten

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: A GIS-BASED ENVIRONMENTAL DECISION SUPPORT SYSTEM FOR THE ERHAI LAKE WATERSHED MANAGEMENT. Lei LIU, Gordon HUANG, and Jonathan LI

Document type:: Monograph

Structure type:: Chapter

183 1SPRS, Vol.34, Part 2W2, “Dynamic and Multi-Dimensional GIS”, Bangkok, May 23-25, 2001 A GIS-BASED ENVIRONMENTAL DECISION SUPPORT SYSTEM FOR THE ERHAI LAKE WATERSHED MANAGEMENT Lei LIU \ Gordon HUANG 1 , and Jonathan LI 2 1 Environmental System Engineering Program, Faculty of Engineering, University of Regina, Regina, Sask., S4S 0A2 Canada Tel: (306) 585-5631, Fax: (306) 585-4095, E-mail: {liulei, gordon.huang}@uregina.ca 2 Department of Geography, University of Regina, Regina, Sask., S4S 0A2 Canada Tel: (306) 585-5273, Fax: (306) 585-4815, E-mail: jun.li@uregina.ca Keywords: decision support system, environmental modeling, GIS, watershed management. ABSTRACT In this paper the integration of environmental models and GIS is exploited. The focus is placed on the development of a GIS-based decision support system for the lake watershed management. The system consists of a GIS database, optimization models, and a user-friendly interface. ArcView GIS is used to enter and compare data from different sources and formats, assess data availability and quality, and identify potential data errors. A centralized database with a structure that allows efficient storage and retrieval of georeferenced time-series data is developed before the water quality simulation and system optimization processes. The database management focuses on the attributes and data necessary to run the simulation and optimization models. An inexact-fuzzy multiobjective linear programming (IFMOP) model is developed to form an environmental decision support system, in association with a number of simulation/evaluation tools. An interactive approach is proposed for conveniently obtaining indispensable intervention from decision-makers during the IFMOP modeling process. The IFMOP allows uncertainties to be directly communicated into the programming processes and resulting solutions. Its inexact solutions can be interpreted for generating decision alternatives and conducting further risk analyses. Also, the IFMOP solution approaches do not lead to complicated intermediate submodels, and thus have reasonable computational requirements. The integrated approach incorporates digital data, models, and system users into a general framework through developing a user-friendly interface. It can generate proper input data files automatically for each model. This component provides a two-way communication between the system and the user. Thus, the user may interactively delineate an area of interest, identify contamination sources to be considered, add additional data, or specify a particular planning objective. Meanwhile, the system explains to the user about each step in the modeling process, displays results from running simulation and optimization models. The system provides the user an evaluation of the quality of data, accuracy of the result, and level of uncertainty. If the user is not satisfied with the results from available data, the system can recommend to the user what data are needed to improve the modeling performance. Based on the integration of geospatial information technology and environmental models, this paper represents a unique contribution to regional planning and environmental system engineering for the methodology of integrated environmental decision support. The methodology allows more powerful manipulation of extensive data, more realistic expression and communication of system activities. It is directly useful for generating, presenting, and evaluating planning alternatives, which can provide general and consistent approaches for the generation of cost-effective and sustainable environmental management solutions. INTRODUCTION Human activities continuously have serious impacts on watershed systems due to economic development and population growth, leading to a series of environmental problems, such as deterioration of water quality, extinction of aquatic species, alternations of river flows, shortage of water resources, and so on (GAO, 1989; Master, 1990). The impact of urbanization is especially pernicious, as it is "cumulatively changing the dynamics of not just stream reaches over periods of years but entire watersheds and landscapes over many decades or centuries" (Dopplelt et al., 1993). Watershed management is related to a number of social, economical and environmental factors. Many of these factors have complicated interrelationships between each other, and may vary temporally and spatially with dynamic features (Dowlatabadi et al., 1993). For example, variations of environmental and socio-economic conditions may lead to conflicts between agricultural and industrial activities, and may need compromises among different stakeholders in order to obtain an overall optimal use of land and water for the entire basin; pollution from different human activities in water or on land may affect water quantity and quality, resulting in impacts on diversity/vitality of aquatic biota and ecological processes; prices of agricultural products may affect the planning of crop production levels; and expansion of agricultural production may have impacts on forest cover (and thus timbering production) due to land use conflicts. Consequently, integrated modeling approach that incorporates individual system components within a general framework instead of examining or presenting them in isolation may be useful for providing holistic and comprehensive analysis of a variety of system activities, as well as relevant policy responses for the sustainability of a water resources system (Huang 1995a and b). Since watershed management is related to a number of land use concerns, effective reflection and presentation of the spatial variations are critical for not only implementation of the modeling results but also procession of the related computational processes. Therefore, a systematic approach that can incorporate watershed modeling and geographic information system (GIS) technology within a general framework is desired for effectively reflecting the interactive and dynamic features of watershed systems. Previously, many studies of watershed modeling for individual system components have been reported (Haimes et al., 1980; Haimes, 1984; Haith 1987; Trezos et al., 1987; Gorelick, 1990; Kindler, 1992; Huang, 1996;). There are also some reports on the use of GIS for obtaining data and presenting modeling outputs (Brail, 1990; Grayman et al., 1993; Liao et al., 1994). This study is an extension of the previously efforts, emphasizing on the development of an integrated modeling-GIS approach that can (i) incorporate a variety of system components and the related submodels within a general framework, (ii) present and quantify system information dynamically with GIS throughout the modeling processes, and (iii) incorporate uncertainties in human decision-making processes regarding environmental management and planning. In detail, an integrated watershed decision support system - GISWMS (Hybrid GIS-Supported Watershed Modeling System) will be proposed. It will then be

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