Abstract
This chapter tells of the technological achievements in hydrologic and hydraulic survey in ancient and modern China. Firstly, water level survey appeared very early in ancient China, and by the Song Dynasty, it had reached a peak, with water gauges widely used. Besides water level survey, flow measurement and calculation were also attached importance to. In modern times, more advances were made in hydrologic survey. Secondly, in terms of hydraulic survey, leveling instruments and practice are elaborated on. In addition, this chapter also introduces measurement of distance, height, depth, and bearings. Thirdly, the chapter sums up the achievements in hydraulic surveying in both ancient and modern China.
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