Hydrology EESC BC 3025
HYDROLOGY - Homework # 8 - due 3/29
1.) (12
points)
Tucson water issues
Download the TAMA
(Tucson Active Management Area)
water use data (TAMA_projections.xls)
and make
(linear?)
projections for population and related
water demand for the next 50 years. Play with different
scenarios, assuming you (a) do and (b) do
not have access to CAP water.
What policy recommendations you
would make for this region? Use a couple of graphs to support your
argument.
2) (10 points) Bangladesh
Arsenic issue
(a) Typical sediment in Bangaldesh contain about 2mg/kg Arsenic.
Assuming a typical prorosity for sand (25%)
determine what the maximum As concentration in water could be if you
dissolve all this As in the water in one instant. The density of the solid phase is the
sediments is of the order of 2.6 kg/liter.
(b) As discussed in class, As is increasing linearly with the 3H/3He
age.
The
slope of that relationship tells us that As is accumulated in
groundwater at a rate of about 20ugL-1yr-1.
If groundwater would flow through the system at a
constant
rate, how long would it take to remove all the Arsenic?