2. Determine the direction of groundwater flow and the groundwater flow gradient.

3. Assuming O follows a Normal distribution, compute the following. (1) Peak flow of the 100-year return period (2) Probability that Q is less than or equal to 20000 cfs (3) Return period of Q> 20000 cfs

2- Based on the material in your book, what are the expectations from an Integrated Watershed Management approach?

4- Define hydrological cycle and explain the main components of the hydrologic cycle with a neat sketch of the cycle.

4. Assuming O follows a Log Normal distribution (use natural log), compute the following. (1) Peak flow of the 100-year return period (2) Probability that Q is less than or equal to 20000 cfs (3) Return period of Q> 20000 cfs

5 Assume that the Selway River data are normally distributed. Find the following: a. Peak flow of the 100-year flood b. Peak flow of the 50-year flood c. The probability that the flood will be less than or equal to 40,000 cfs d. The return period of the 40,000-cfs flood. . Assume that the Selway River data are log normally distributed. Find the following: a. Peak flow of the 100-year flood b. Peak flow of the 50-year flood c. The probability that a flood will be less than or equal to 40,000 cfs d. The return period of the 40,000-cfs flood

Problem 2: During a 60-minute storm, the precipitation rate over a 90-acre area is 0.9 in/hr. An infiltration rate of 0.12 in/hr is assessed for the period of the storm. The average river outflow from the arca is 40 cfs during the storm. What is the value of combined depression and interception storages in acre-ft, cubic ft, and cfs-hour.

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.

A lake is fed by a polluted stream and a sewage outfall. The stream and sewage wastes have a decay rate coefficient (k) of 0.3/day (1st order units). Assuming complete mixing and no other water losses or gains, what is the steady-state pollutant concentration as mg/L in the lake? \text { Incoming Stream: } C=10 \mathrm{mg} / \mathrm{L}, Q=55 \mathrm{~m}^{\wedge} 3 / \mathrm{s} \text { Sewage Outfall: } C=100 \mathrm{ppm}, Q=0.5 \mathrm{~m}^{\wedge} 3 / \mathrm{s} \text { Lake: V=1,000 m^{ } 3}

Report Design Aims and Objectives The aim of this report was to undertake a preliminary design of the detention basin. This was done by designing a culvert, weir, emergency spillway, baffles, and dam embankment, to safely manage outflows from the proposed urban development and minimise risks for downstream catchments.