- Civ2263 Assignment Open Channel Flow Assignment Water Surface Profiles A Very Long Straight Channel Has A Trapezoid 1 (38.65 KiB) Viewed 505 times
- Civ2263 Assignment Open Channel Flow Assignment Water Surface Profiles A Very Long Straight Channel Has A Trapezoid 2 (53.56 KiB) Viewed 505 times
- Civ2263 Assignment Open Channel Flow Assignment Water Surface Profiles A Very Long Straight Channel Has A Trapezoid 3 (44.56 KiB) Viewed 505 times
- Civ2263 Assignment Open Channel Flow Assignment Water Surface Profiles A Very Long Straight Channel Has A Trapezoid 4 (44.56 KiB) Viewed 505 times
CIV2263: Assignment - Open channel flow Assignment - Water surface profiles A very long straight channel has a trapezoidal cross-section, with width b = am at the bottom and the sides with slopes of IV:1H (i.e. m-1 in Figure 1). The longitudinal slope of the channel is 0.6%; the Manning roughness coefficient is n: -0.014 m10s, but part of the channel, for a length L = 300 + 10 am, is covered by some vegetation increasing the roughness coefficient to 12=0.04 m³/s (Figure 2). The channel conveys water with a flow rate of Q-10 m³s¹. m Figure 1. Cross section of the channel: the slope of the sides of the channel is IV-IH (.e. m 1). a 0.014 m $0.6% -0.04 m² -0.014 m Figure 2. Longitudinal section of the channel with the different roughness coefficients Tasks 1. Calculate the water depths required to fully identify the water surface profiles along the channel. 2. Provide a qualitative sketch of the water profiles along the channel with appropriate labels (i.e., M1, M2, M3, S1, S2, S3). 3. Calculate numerically water depths along the channel. If a jump forms in the channel, find its position. Use A or A' as references to define the distance where different profiles might start and end. Parameter a is the average number of characters in your given name and last name. For example, for Edoardo Daly, a=(7+4)/2=5.5.
A brief report needs to be submitted for this assignment. The report must contain: Value of the parameter a Calculation of all the water depths that need to be used to identify the water surface profiles along the channel. Provide an explanation of which water profiles (i.e., M1, M2, M3, S1, S2, S3) you might expect along the channel [up to 4 marks] Qualitative sketch of the water profiles along the channel with appropriate labels (i.e., M1, M2, M3, S1, S2, S3) [up to 1.5 marks] Numerical calculations of the water depths along the channel. Use 20 intervals (i.e., 21 values of depths) between the depths upstream and downstream of your calculations. Provide both tables with appropriate calculations and graphs of calculated water depths along the longitudinal coordinate (use A and A' as a reference for the calculation of the longitudinal coordinates) [up to 6 marks] Some marks will be allocated to the presentation of the report [up to 0.5 marks]
Assignment - Water surface profiles A very long straight channel has a trapezoidal cross-section, with width b=am at the bottom and the sides with slopes of IV:1H (i.c., m=1 in Figure 1). The longitudinal slope of the channel is 0.6%; the Manning roughness coefficient is n₁ = 0.014 m3s, but part of the channel, for a length L = 300+10 am, is covered by some vegetation increasing the roughness coefficient to 1₂=0.04 m²¹1³s (Figure 2). The channel conveys water with a flow rate of Q = 10 m³ s¹. m b Figure 1. Cross section of the channel: the slope of the sides of the channel is IV:IH (e.m=1). n, 0.014 m/s S₂ = 0.6% n,-0.04 ms -0.014 m Figure 2. Longitudinal section of the channel with the different roughness coefficients. Tasks 1. Calculate the water depths required to fully identify the water surface profiles along the channel. 2. Provide a qualitative sketch of the water profiles along the channel with appropriate labels (i.e., M1, M2, M3, S1, S2, S3). 3. Calculate numerically water depths along the channel. If a jump forms in the channel, find its position. Use A or A' as references to define the distance where different profiles might start and end. Parameter a is the average number of characters in your given name and last name. For example, for Edoardo Daly, a=(7+4)/2=5.5.