Abstract:

The modern water conservancy map clearly records the regional water body features in the Republic of China period, which has important value and role in the study of historical water system changes. On the basis of “Digital History of the Yellow River”, this paper takes the “Topographic Map of Ditches and Waterways along the Yellow River in Ningxia Province of the Republic of China” as an example, and with the support of TGIS technology and theory, the modern water conservancy map is informationized with modern geographic information technology, and then the spatial autocorrelation, fractal and irrigation efficiency are used to analyze the data. The analysis results show that: The irrigation canal in Ningxia had significant natural river form characteristics before liberation, indicating that local water conservancy facilities and “annual repair” in traditional times could not overcome the continuous influence of environmental factors such as frequent changes of Yellow River road, lateral channel swing, and unstable water volume on irrigation, which was difficult to clear through manual interpretation and statistical analysis.

Key words: TGIS , digital history of the Yellow River , modern water conservancy map , informatization