The initial infiltration capacity (fo) of a watershed is estimated as 1.3 in./hr, and the time constant is taken to be 0.4 hr -¹, The final infiltration capacity (fc) is 0.2 in./hr. Use Horton's equation to find the infiltration capacity, ƒ [in/hr], at t=30 min and enter it in the answer section.

A catchment has the Horton infiltration parameters: fo= 150 mm/h, fc = 50 mm/h, and k = 3 min¹. The design storm is given below. Estimate the time when ponding begins. Interval (min) Average rainfall (mm/hr) 20 40 80 170 90 20 0-10 10-20 20-30 30-40 40-50 50-60

5) Two water reservoirs are connected by a cast iron pipeline which is 150 mm in diameter for the first 6 m and 225 mm diameter for the remaining 15 m as shown in Figure 1. The entrance and exit are square-edged. If the discharge is 0.185 m³/s and dynamic viscosity of water is 0.00102 Ns/m², determine the various losses along the pipeline. Answer (2.78 m, 1.72 m, 1.1 m, 5.01 m, 1.54 m of water) H JALA B water Figure 1 C water

You are asked to design a rectangular clarifier for a wastewater treatment plant. The clarifier is designed to settle 2,000 m3/day with an overflow rate of 32m3/m2-day. If the tank is 2.4 m deep and 4.0 m wide, what should the length and detention time be?