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Các đặc tính của sự cân bằng nước TRONG một sự kiện lũ lụt lớn IS ích để các nhà khoa học, nhà lập kế hoạch sử dụng đất, và các cơ quan chính phủ như vậy thông tin có nhu cầu để phát triển chiến lược để đối phó với lũ lụt trong tương lai. Những phát triển gần đây công nghệ dưới hình thức lập bản đồ máy tính và cơ sở dữ liệu phân tích có nghĩa là để cung cấp Các phân tích chính xác liên quan đến lũ bộ dữ liệu, như vậy là dòng. | CHAPTER 6 GIS Modeling and Visualization of the Water Balance during the 1993 Midwest Flood Pawel J. Mizgalewicz W. Scott White David R. Maidment and Merrill K. Ridd INTRODUCTION The characterization of the water balance during a major flooding event is useful to scientists land-use planners and government agencies who need such information to develop strategies for coping with future floods. Recent technological developments in the form of computer mapping and analysis databases have provided the means to accurately analyze flood-related data sets such as streamflow and precipitation measurements over extended periods of time. This study investigates the use of geographic information systems GIS to model spatially distributed and time-varying hydrologic and meteorologic data sets and the use of scientific visualization techniques in the interpretation of the results. The data sets referred to deal specifically with the 1993 Midwest flood which affected a large part of the Upper Mississippi River Basin. The study area encompasses the main stem of the Mississippi River above Cairo Illinois and the main stem of the Missouri River below Gavins Point Dam near Yankton South Dakota. Also included are the many tributaries of these rivers such as the James Des Moines Illinois and many other rivers and streams. This region of nearly 700 000 km2 was previously defined by the Scientific Assessment and Strategy Team SAST as the area most affected by the spring and summer floods of 1993 SAST 1994 . States included in this study are Illinois Indiana Iowa Kansas Minnesota Missouri Nebraska North Dakota South Dakota and Wisconsin Figure 6.1 . Exactly 180 Hydrologic Unit Code HUC subbasins 8 digit cover the study area. The goal of this project is twofold 1. Develop demonstrate and document procedures used to model the water balance of a large-scale flooding event such as the 1993 Midwest floods utilizing hydrologic and meteorologic data sets in a GIS database and 2. Develop a .
