- Question 2 A Explain What Is Isochrone And Describe How The Surface Runoff Hydrograph Is Estimated In Time Area Method 1 (25.37 KiB) Viewed 27 times
- Question 2 A Explain What Is Isochrone And Describe How The Surface Runoff Hydrograph Is Estimated In Time Area Method 2 (58.29 KiB) Viewed 27 times
- Question 2 A Explain What Is Isochrone And Describe How The Surface Runoff Hydrograph Is Estimated In Time Area Method 3 (58.29 KiB) Viewed 27 times
Table Q2a: Historical Inflow and Outflow Hydrograph Ordinnates Time (hr) I (m/s) Q(m³/s) Time (hr) 0 3 3 9 48 48 1 4 3 0 10 10 270 19 42 47 264134 11 30 15 300 17 I (m³/s) Q (m³/s) Note: I is inflow at upstream and Q is outflow at downstream of a river reach 33 3 12 6 12 21 36 Table Q2b: Upstream Discharge of a River Reach Time (min) 60 Q(m³/s) 25 Time (min) Q (m³/s) 330 16 4 21 10 13 12 26 90 32 360 14 5 33 18 14 6 17 390 12 c) The development of upstream area of a watershed has been recognized as a critical issue for the local authority because the downstream section of the river has frequently experienced the major flood events. Therefore, a hydrological study shall be carried out to investigate the magnitude of flood based on the observed upstream discharge. The continuous discharge of the upstream section of the main river draining the watershed has been recorded and is shown in Table Q2b. Route the following hydrograph through a river reach for which Muskingum Storage Function parameters k = 60 min and x = 0.2. Derive the peak discharge of the downstream flood. At the start of the inflow flood calculation, the initial outflow at downstream is 10 m³/s. 120 150 31 28 6 42 420 10 28830 15 10 782636 180 25 450 10 48 16 8 51 44 210 22 480 10 240 20