The elapsed time between the time rainfall begins and the time water begins to pond on the soil surface is called O Time to peak O Lag time O Runoff time O Ponding time O None of the choices
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- HYDROLOGY WHEN t0 = 8:00AM WHAT IS THE INTENSITY OF THE OF THE RAINFALL BETWEEN 9:00AM AND 9:30AM USING A 30-MIN INTERVAL PLEASE SHOW STEP BY STEP COMPUTATIONN.precipitation method.The monthly water chart of a specific basin is given for a specific year. The area of the basin is (100+2α) km2and the limit soil moisture is (155-α) mm. Fill the blanks in the chart and calculate the monthly runoff volumes(The soil moisture at the beginning of the water year is assumed to be 20). The variable α is 58
- Civil Q- The infiltration rates in a region during various periods of time following the 0.20 to 0.30 0.10 to 0.20 0.25 0.15 Table 5.1 displays the storm's onset. 900 mm of rain fell in all. Using Horton's approach, calculate the total rain, total infiltration loss, and excess rain.Oil (SG=0.80) flows through aventuri meter as shown,a. Calculate the flowrate.b. Calculate thereading ‘‘h’’ shownby the differentialmanometer fittedto the pipelinewhich is filled with mercury of specificgravity 13.6.c. How will the flow rate change if the liquidflowing through the pipeline is replacedwith water.The length of a parking lot is L = 100 m, and it is sloped at So = 0.02. The surface of the lot is bare clay with a Manning roughness factor of n = 0.020. A rainstorm produces a constant rainfall excess at the rate of ?0 = 25 mm/hr. If td = 25 minutes: Determine the runoff hydrograph at the downstream end of the parking lot. Based on your answers in Step 1, draw your estimated hydrograph. ***Convert i0 to mJs. This conversion is not given and I cannot find it.
- Precipitation over a large area is not uniform, due to a climatic change as a result of pollution and other external factors. This has made it impossible to have an accurate e measurement for rainfall intensity. Suggest a more suitable approach for the measurement precipitation to convince a civil engineer to adopt your approach for the measurement of flow depth8.75 litres of water added to an evaporation pan of 1.2m diameter to bring the water to a stipulated level.If nearby raingauge measures a rainfall of 4.2mm.What is the pan evaporation and what is the actual evaporation if Cp=0.7Multiple Choice: Select the best answer 1. The storm precipitation of station ‘x” is 84 mm for part of a month during which a storm occurred .The respective storm precipitation at three surrounding stations A,B, and C were 96 mm,84 mm and 112 mm respectively. If the normal annual precipitation at stations A,B and C were 1000 mm ,840 mm and 1060 mm respectively ,compute the annual precipitation at “x”. Show your solution A. 680.29 mm B. 834.44 mm C. 809.32 mm D. 768.90 mm
- Mention three mechanism that generate rainfallPrecipitation over a large area is not uniform, due to a climatic change as a result of pollution and other external factors. This has made it impossible to have an accurate measurement for rainfall intensity. Suggest a more suitable approach for the measurement of precipitation that will convince a civil engineer to adopt your approach for the measurement of flow depth?A tank has 40L of sewage runoff. It initially consists of 60% water and 40% pollutants. Another sewage runoff with 70% water and 30% pollutant is being added to the tank at a rate of 3L/min. As the tank is being filled, the solution is also being drained at a rate of 4L/min. How much pollutant is in the tank after 7 mins?