3. Graph a single well capture zone (on Excel) using Javendal's approach. What is the minimum extraction capacity you can use to contain the plume with a single well?

Find the hydraulic conductivity of the soil sample shown below. The porosity of the soil sample is 0.31. The piczometers readings are ₁ = 20 cm and ₁=28 cm. The discharge is 0.55 liters/day and Ax= 65 cm. The soil sample is contained in a tube of 15-cm diameter, where 0 = 42 degrees. Find the time it takes for a water particle to travel the length of the sample.

The intrinsic permeability of a soil sample is 3.5x10f². What is the water discharge per unit width, in cubic ft per day, through a confined aquifer of similar soil properties for hydraulic head difference of 0.51 ft over a length of 750 ft? The water temperature through the soil is 50°F and the porosity of the soil is 0.30. The average depth of the aquifer is 35 ft. Also, find the time in days the water will take to move 500 ft.

A well is dug in the ground. The ground surface elevation is 1340 ft. The water surface level inthe well has an elevation of 1319 ft. The bottom of the well has an elevation of 1298 ft. What are the hydraulic head, pressure head, and pressure in the aquifer at the location of the well?

Prepare a short report (no more than 6 pages excluding title page) addressing the following tasks: • Conduct a literature review of the hydrological impacts of reafforestation. In particular, assess the suitability of methods that can be used to predict changes in streamflow yield following reafforestation. • Consider a 500 km² catchment located near Dubbo, NSW. The catchment is presently exclusively dedicated to grazing. It is proposed to replace 70% of the grazing land with plantation forest. Assess the effect of the proposed reafforestation on the long-term streamflow yield. Climate information can be found in: http://www.bom.gov.au/jsp/ncc/climate_averages

Water Balance Calculation using the Budyko Curve: The Zhang equation [Zhang et al., 2001] presented below gives the ratio of actual basin evapotranspiration, ET, to precipitation, P as a function of aridity index :

\text { 4. What is the flowrate (cfs) due to infiltration at elevation } 5.0 \text { feet if } K \text { (ft/day) }=5.0 ? \text { (a) }<0.5 \text { cfs (b) } 0.5-2 \text { cfs (c) } 2-4 \text { cfs (d) }>4 \text { cfs } \text { Darcy's Law- Q (cfs) }=K^{\star} i^{\star} A K (ft/s) is the hydraulic conductivity • i = dH/dL = 1%3D A (sf) is the area at the elevation in question

3- What return period must a highway engineer use in designing a critical underpass drain to accept only a 10 percent chance of occurrence of a storm event in the next 5 years?

For a flow rate of 212 cfs find the critical depth in (a) a rectangular channel with b = 6.5 ft,(b) a triangular channel with m = 1.6 ft, (c) a trapezoidal channel with b = 6.5 ft and m =5.0 ft, (d) a circular channel with d = 6.5 ft.

Below a discharge from a wastewater treatment plant, an 8.6-km stream has are oxygenation constant of 0.4 day', a velocity of 0.15 m/s, a dissolved oxygen concentration of 6 mg/L, and an ultimate oxygen demand (L) of 25 mg/L. The stream is at 15°C. The deoxygenation constant is estimated at 0.25 day'. a. Will there be fish in this stream? b. Why should we care if there are fish in the stream? Do the fish deserve moral consideration and protection? What arguments can you muster to support this view?