CEE 371 

Fall 2009 
Homework #1 Water Demands and
Population Projections
Table 1 contains water demand and population data for
Table 1. Average Daily, Maximum Daily &
Peak Hourly Demands, and Population for
Year

Annual Average Daily Demand (MGD) 
Maximum
Daily Demand (MGD) 
Peak
Hourly Demand (MGD) 
Population 
1960 
1.34 
1.91 
3.62 
13,718 
1970 
2.90 
4.25 
7.25 
26,331 
1980 
3.19 
4.24 
9.57 
33,229 
1985 
3.73 
4.75 
9.24 
34,537 
1990 
3.95 
5.27 
9.85 
35,228 
1995 
3.97 
5.43 
10.4 
35,065 
2000 
4.15 
5.81 
10.1 
34,874 
1. Prepare a figure showing the
average daily and maximum daily water demand data provided in Table 1 Put two
plots on the same figure; one plot showing average daily demand and the other
showing maximum daily demand. Use units
of MGD for the demands with a scale from 0 to 8 MGD, and the time scale should
go from 1950 to 2030. Based on the plots
(no calculations), what is your estimate of the average daily and maximum daily
demands for 2010 and 2020?
2. Prepare a figure with two
plots showing the ratios of maximum to average daily demand and of peak hourly
to average daily demand using all the available data in Table 1. Plot these
ratios (scale: 0 to 4.0) versus year (scale: 1950 to 2010). Compute the minimum, maximum, and mean value
for each ratio and compare the mean values to the national averages presented
in class.
3. Using population data and
4. Using the historical
population data for
5. Using your population
projections from part “4”, calculate the average daily and maximum daily
demands (in MGD) for 2010 and 2020. Select an average per capita daily demand value
and a ratio of maximum daily to average daily demand based on your analysis of
the
6. Calculate the fire demand
needed for
Assigned: 16 Sept 09
Due: 23 Sept 09