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Topologic Navigation and the Pfafstetter Systemby Jordan Ernest Furnans, MSE and David R. Maidment, PhD ABSTRACT This thesis explores the spatial structure of drainage area connectivity. In particular, it describes a new method for tracing water movement from one drainage area to the next through the landscape. This method, named Topologic Navigation, is applicable on drainage area datasets whose entries each have as attributes a unique ID code and the ID code of the area immediately downstream. From this information, the areas immediately upstream of each area in the dataset are discernible. With knowledge of this connectivity, it is possible to derive the entire upstream and downstream drainage areas of a single area in the landscape. Downstream area IDs may be determined automatically for datasets attributed with Pfafstetter-based codes. These codes are assigned to drainage areas based on the relative drainage topology of the areas. A detailed methodology for determining downstream IDs using Pfafstetter-based numbering systems is developed. Use of the downstream IDs in performing Topologic Navigations is also demonstrated and discussed. Extensive modifications to the existing Pfafstetter-based numbering systems are also suggested. The highlighted links that follow are connected to Adobe pdf files of the corresponding material. To view them you must have the Adobe Acrobat Reader 3.0. View the Report...(3656 KB)
These materials may be used for study, research, and education, but please credit the authors and the Center for Research in Water Resources, The University of Texas at Austin. All commercial rights reserved. Copyright 2002 Center for Research in Water Resources. |
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