Environmental Engineering
Questions & Answers
A 4-hr rainfall hyetograph in in/hr that occurred on January 5, 2022, is shown in figure 2 below. Assume the rain fell uniformly on the watershed. Use the information given to determine the predicted outflow at the watershed outlet using HEC-HMS. Assume no base flow. Use SCS method for unit hydrograph (transform component) for the sub-basins A, B, and C. Use Snyder's method for unit hydrograph (transform component) for Sub-basin D. Use SCS method for Loss component for all Sub-basins. Submit Homework as MS word with screenshots of: 1) HEC-HMS window that shows the entire window including Basin model before starting the run. 2) HEC-HMS window that shows the Global Summary Result. 3) The results in graphs for each subbasin, reach, and Junction.
46) The threshold level for acutely harmful effects of toxic pollutants is most closely related to the A) first appearance of chronic effects. 5) time of day of exposure. ) concentration of exposure. D) concentration and duration of exposure.
Calculate the alkalinity, total hardness, carbonate hardness, and noncarbonate hardness for the following water in mg/L as CaCO3.
1. (25%) Write an energy balance problem (similar to homework problems or example problems we have done in class) about heat conduction through a window.Note that the heat capacity of air is 1.00 kJ/(kg-K) and the thermal conductivity of glass is 0.8W/(m-K). Make sure your problems statement includes: definitions of all other parameters necessary to solve the problem, o values and units for each of those parameters, and any assumptions that must be made to solve the problem.
03) Which of the following demonstrates the greatest stewardship in addressing the production and disposal of MSW? promote strategies that reduce the generation of MSW compost organic components of MSW recycle MSW as much as possible promote strategies that reduce MSW, compost organic components, and recycle as much MSW aspossible
Problem 4. Using the following estimates for the US and assuming that growth rates remain constant. A. Find the carbon emission rate in 2020. B. Find the total carbon emitted during those 30 years. C. Find the total energy demand in 2020. D. Find the per capita carbon emissions in 2020.
16. CVEN 3401: A completely mixed continuous bioreactor used for growing penicillin operates as a zero order system. The input, glucose, is converted to various organic yeasts. The flow rate to this system is 20 L/min, and the conversion rate constant is 4 mg/(min-L). The influent glucose concentration is 800 mg/L, and the effluent must be less than 100 mg/L. What is the smallest reactor capable of producing this conversion?
Locate an article on Environmental Engineering and write a one-page summary (12-point font,double spaced). The article can be from a newspaper, magazine, or professional paper (i.e. Union-Tribune, Environmental Science & Engineering Magazine, or Conference Paper). Your topic could be from one of the many different areas of the Environmental Engineering field including air and water pollution control; water and wastewater treatment; industrial,agricultural, and hazardous chemical treatment and disposal; remediation of contaminated sites and groundwater, or development of new technologies to protect the environment from the impact of human activities. 1. Your summary should discuss the Environmental Engineering issue and how it was or will be resolved. 2. In your summary, please include why you chose this article 3. Also state how it relates to your major in Environmental or Civil Engineering (or other major). 4. Reference the article you reviewed in MLA format.
Problem 4. Drawdown at a 0.2 m diameter, fully penetrating well, which has been pumping at a rate of 1000 m³/day for a long time that steady state conditions have been reached, is determined to be 0.70 m. The aquifer is unconfined and 10 m thick. An observation well 10 m away has been drawn down 0.20 m. Determine the hydraulic conductivity of the aquifer. Draw a picture of the system.
