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Please use the provided Standard Step Method excel file to determine the water depth at the upstream. If the downstream is a half-circle channel (see figure below) with known water depth 1.5 m and elevation Z1 = 0 m. At the 100 meters upstream, there is a triangular cross-section (see figure) with elevation Z2= 0.5m. Assume the Manning's n is a fixed value = 0.045 and Q = 1.5m'/s. The energy correction factor due to channel shape change is C = 0.2. Please determine the water depth at the triangular cross-section. 2v y=1.5 m y=?? m Downstream Upstream