Water as a Resource: Indicate which statements are true and which are false If permeable cover is built over the recharge area of a confined aquifer, then, recharge can be considerably reduced. False Many synthetic chemicals that have leaked into water through improper waste disposal might be toxic even at concentrations of 1 ppb or less. False

Water as a Resource: Indicate which statements are true and which are false If permeable cover is built over the recharge area of a confined aquifer, then, recharge can be considerably reduced. False Many synthetic chemicals that have leaked into water through improper waste disposal might be toxic even at concentrations of 1 ppb or less. False

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A waste stream is discharging into a river at a rate of 5 m3/s. Upstream of where the waste stream enters the river, the river has a streamflow of 100 m3/s with a nitrate concentration of 1 mg/L. Downstream of where the waste stream enters, the nitrate concentration has been measured to be 3 mg/L. What is the nitrate concentration in the waste stream? Assume no change in storage in the system.
Please choose the correct answer: 1. In water cycle, ______ brings H2O from water in a lake to vapor at atmosphere. A. evaporation; B. evapotranspiration; C. precipitation; D. infiltration 2. A drinking water well in NJ is seriously polluted due to saltwater intrusion. The major pollutant is _____. A. Oxygen demanding materials; B.salts; C. nutrients; D. toxic heavy metals 3. The real reason to cause saltwater intrusion is the different of _____ between freshwater and seawater. A. density; B. temperature; C. velocity; D. all of the above 4. Which of the following represents a non-point pollution source? A. Leaking underground gas tanks; B. CSO; C. urban runoff; D. an outlet of untreated industrial wastewater into a river
Why is groundwater important in California? Why is it difficult to remediate (clean up) an aquifer once it has become contaminated?
1. Assuming that the President Street Municipal Wastewater Treatment Plant (MWTP) processes on average 10 Mgal d' of raw sewage, and that wastewater has a typical organic carbon loading of 175g CL'. How much oxygen (in moles) would be lowered in the Savannah River is all of this waste TOC was remineralized? If the Savannah River flow is approximately 2.3 x 10°L d' and the river water started with 7 mg/L O2, how much change in the DO could happen if we did not treat this waste? Is there enough oxygen in the river?
Reuse of wastewater for Non-potable urban use (e.g., fire protection, air conditioning, toilet flushing) 3. Describe the treatment technology employed in the case study to meet the water quality requirements for the above reuse option. Case Study: The success of the NEWater proiect has inspired similar initiatives in other countries, such as the Groundwater Replenishment System in Orange County, California, which also uses advanced treatment technologies to purify wastewater for non-potable urban uses
You are provided with the following information about a municipal wastewater treatment plant. This plant uses the traditional activated-sludge process. Assume the microorganisms are 55 percent efficient at converting food to biomass, the organisms have a first-order death rate constant of 0.050/day, and the microbes reach half of their maximum growth rate when CE 3059 Page 2 of 2the BOD5 concentration is 10.0 mg/L. There are 150,000 people in the community (their wastewater production is 225 L/day-capita, 0.10 kg BOD5/capita-day). The effluent standard is BOD5 = 20 mg/L and TSS = 20 mg/L. Suspended solids were measured as 4,300 mg/L in a wastewater sample obtained from the aeration tank, 15,000 mg/L in the secondary sludge, 200 mg/L in the plant influent, and 100 mg/L in the primary clarifier effluent. The mean cell residence time is 4.0 days. a. What is the design volume of the aeration basin in cubic meters?b. What is the aeration basin detention time? c. How many kg of secondary dry…
As its relates to Jamaica answer the following, also include references. 1.How relevant are NEPA’s concerns about alkalinity, acidity and oxygen levels? 2.Rainfall is naturally somewhat acidic, since pure water in equilibrium with atmosphericcarbon dioxide forms a weak solution of carbonic Acid, with a pH of ~5.6. How is AcidRain (pH<5.6) naturally countered in fresh surface water bodies? 3.What is the inherent danger when this counteractive measure is in effect?
Biological waste water treatment is the exclusive territory of microorganisms, higher organisms such as animals and plants are not capable of treating wastewater. 1.True 2.False
A chemical spill occurred at a gas station and a homeowner worried that the chemical could contaminate their well located at 100 feet away from the spill point. The hydraulic conductivity and the water table slope of the aquifer are 0.014 ft/sec and 1%, respectively. How long it takes the chemical to get the well? Assume the porosity is 20%.
From water sample, 25 mg/L HCO3" as CacO3, 10 mg/L C032 as Caco3 and 50 mg/L Ca* as CaCO3 were measured. pH was near neutral. What is alkalinity? () mg/L as Cac03 (*Answer in whole number only)
Proponents of deep well injection of hazardous wastes argue that it will never be economically feasible to pump water out of aquifers more than one kilometer below the surface. Therefore, they say, we might as well use those aquifers for hazardous waste storage. What do you think? Why?
10.3. For some reason, a lined hazardous-waste landfill was located on top of a confined aquifer. Situated approximately 500 m away is a community water supply well which is pumped at a rate of 104 m³/d. If an earthquake occurs which splits open the liner and pollutes the aquifer, how much time is available to shut down the well and avoid withdrawing contaminated water? Assume the follow- ing aquifer characteristics are applicable: hydraulic conductivity = 50 m/d, porosity = 0.2, aquifer thickness = 5 m, and aquifer width = 50 m. (Courtesy of Jim Hunt.)