Engineering -6034EXQ Coursework Title: a) Flood risk assessment for a rural catchment b) Estimating flow exchange in urban areas and applying dimensional analysis principles.

3. A rainfall with intensity of 45 mm/h and duration of 1.5 h falls on a 540 ha catchment. Use rational method to calculate the peak runoff for the followingconditions: Natural soil, with time of concentration te = 2 hour and C = 0.4, b) Improved, partially paved area, with time of concentration te 1 hour and C 0.7.State any assumptions used.

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

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

5- A class A pan was set up adjacent to a lake. The depth of water in the pan at the beginning of a certain week was 195 mm. in that week there was a rainfall of 45 mm. 15 mm of water was removed from the pan to keep the water level within the specified depth range. If the depth of the water in the pan at the end of the weak was 190 mm, calculate the pan evaporation. Using a pan coefficient, Cp = 0.7.Estimate the evaporation from the lake in that week.

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

.. A concrete dam holds back the ocean as shown below. Determine the moment of the fluid force(per unit length into the paper) about the back corner of the dam (Location A).

1.18. A watershed of 2,000,000 km? with six rainfall gages can be divided into Thiessen polygons with areas listed in the table below. a) Using the rainfall measurements listed, find the average rainfall over the watershed in cm using the Thiessen calculation method. b) Calculate the average rainfall using the arithmetic mean method, and compare.

P1: Gate AB is Fig. P1 is 6 ft wide and weighs 2000 lb when submerged. It's hinged at B and rests against a smooth wall at A. Determine the force P at A which is needed to keep the gate closed.

A 15-minute unit hydrograph is given in the following table. a) (5 points) Determine the corresponding area of the drainage basin. b) (20 points) Determine the 10-minute unit hydrograph. c) (15 points) Determine the total runoff (streamflow) hydrograph resulting from the application of the following rainfall excess to the 10-min unit hydrograph, assuming the base flow is 2 m/s.