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Extracted text: A gauging station has a measured depth of 1.27 m in a triangular section. What is the distance and direction (upstream or downstream of the gauging station) to a second section with a measured depth of 0.57 m? Assume the channel has a longitudinal slope of 0.0007 m/m, a side slope of 2, a roughness of 0.015, and a discharge of 12 cms. O a. 66.6 m upstream of gauging station O b. 66.6 m downstream of gauging station c. 28.6 m downstream of gauging station O d. 37.9 m upstream of gauging station