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Soil Water Conservation

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SOIL AND WATER CONSERVATION ENGINEERING USING A 3-D GIS

ABSTRACT Taipei Water Resource Commission is in charge of soil and water conservation for the headwater in Taipei City. 90% of drinking water for a four-million population is controlled by the Commission. A 3-D GIS has been developed in the last three years. This paper discusses how soil and water conservation engineering can be facilitated by the GIS. An 80% to 90% automatic process was pursued. 3-D drawings, calculations, and paper work can be obtained from a personal computer. All drawings were then built into the 3-D data base. 3-D animation of a proposed conservation engineering can be obtained as well. INTRODUCTION Taipei Metropolitan is an area with population exceeding 4 million. About 90% of its drinking water is provided by the Taipei Water Resource Commission. Water and soil conservation at Taipei Water Resource Commission is a very important task. A 3-D GIS has been developed in the last three years (Wu, 1990). Remote sensing can be implemented to monitor landslides and land uses in the two watersheds (Wu, 1991). However, water and soil conservation engineering is still a time consuming process, especially in the design process. Both drawing and calculations are labor intensive. This paper will discuss how a GIS can make the drawing and calculation process a semiautomatic process. Site selection of a water and soil conservation engineering can be reviewed by a GIS to insure that its benefit can be at a very high level. Solid modeling and animation can be performed before the construction taking

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