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Do thời gian và mức độ kỹ năng kỹ thuật cần thiết cho việc hoàn thành các nghiên cứu địa mạo, các dự án cá nhân có lịch sử Được giới hạn trong kích thước và phạm vi. Với sự ra đời của các hệ thống thông tin địa lý (GIS), luận án có vấn đề kỹ thuật Been assuaged. Khả năng GIS của Lưu trữ số lượng lớn và khác nhau của dữ liệu không gian cho phép phân tích phức tạp của nhiều trang web được thực hiện nhanh chóng, hiệu quả, và với một mức độ cao. | CHAPTER 5 Deriving Stream Channel Morphology Using GIS-Based Watershed Analysis Scott N. Miller D. Phillip Guertin and David C. Goodrich INTRODUCTION Because of the time and degree of technical skill required for the completion of geomorphology studies individual projects have historically been limited in size and scope. With the advent of geographic information systems GIS these technical problems have been assuaged. The GIS capability of storing large and diverse quantities of spatial data allows for the complex analysis of many sites to be carried out quickly efficiently and with a high degree of repeatability Burrough 1986 . However GIS-based projects often fail to integrate field-collected data with GIS spatial data. This project was designed to relate the GIS characterization of spatially distributed watershed characteristics with field measurements of point-attribute data channel cross-section surveys . These data sets were related using statistical analysis to derive relationships between watershed characteristics and channel shape. Watershed characterization based on geometric and physical properties was carried out in a GIS on 222 subwatersheds within the Walnut Gulch Experimental Watershed. At the same time a field measurement program was completed in which channel shape characteristics were measured at the outlet of each subwatershed. Statistical analysis between the two data sets showed a strong relationship between channel shape and watershed characteristics. It was shown that the derivation of hydrologic model parameters may be effectively carried out in a GIS on a large number of data points in a relatively short amount of time. With its long history of data collection and observational data Walnut Gulch serves as an excellent location on which to conduct research into geomorphologic and hydrologic processes Renard et al. 1993 . Relatively little work however has focused on the characterization of the entire watershed. This lack of data has limited
