Chapter 14, Problem 16P

Water Resources Engineering For the following transition, draw E2, y2 on the specific energy chart. Fully describe your reasoning for your placement. E1, y1 is shown on the chart. For this transition, in a rectangular channel, there is a sudden increase in the depth of the channel bottom.

The width of the channel is reduced in the downstream. Upstream flow is subcritical. Please can you explain possible changes to the flow of the channel, and show how this would look on the specific energy diagram? Thanks for any help! Ive attached a picture of the specific energy diagram.

Given following data, calculate a. Average specific gravity b. Average absorption value

Lake Taal has a volume of 458 cubic km, and its rate of inflow and outflow are both 175 cubic km/year. Suppose that the time t=0 (years), its pollutant concentration is 0.06 %, and that thereafter the concentration of pollutants in the inflowing water is 0.01 %. Assuming that the outflow is perfectly mixed lake water, find the initial-value problem and how long will it take to reduce the pollution concentration in the lake at 0.03 %?   Show illustrations Use 3 decimals

A desalination plant produces 10,000 m3/day of brine with concentration of 80 g (gram)/L. This brine will be thrown into the ocean. But the concentration has to be  lowered to 60 dS/m. How much seawater should be mixed with the brine if the seawater  has a salinity of 3%.? Calculate how much salt is in the brine in Tons/day.

WATER RESOURCES ENGINEERING: Evaporation The temperature and relative humidity for the month of October have the following values: Mean air temperature at 4m: 18o C Maximum lake temperature: 13.5o C Maximum pan temperature: 15o C Relative humidity: 35% During the month, the evaporation measured from the pan was 9.2 cm. Determine the monthly evaporation from the lake by: a. The simple formula, assuming K = 0.75 b. The refined formula, assuming K' = 1.5 c. Solve for lake evaporation using the Aerodynamic method for evaporation using the actual vapor pressure at 4m. The wind speed at 4 m is 2.5 m/s and z0 is 0.04 cm. For calculating the saturation vapor pressure at the surface, assume mean lake temperature to be 80% of the maximum.

List three characteristics of the atmospheric conditions that affect evaporation of the body

Find average water flux in question attached.

How does an estimate of chlorinity allow us to determine salinity? Explain what principle is involved and what this principle means.