Reservoir A has a capacity of 48 000 million litres, drains a catchment area of 263 hectares and receives approximately 1170 mm in available rainfall each year.
Problem: Calculate the steady state residence time of water in reservoir A (if water is removed and replenished at the same rate).© BrainMass Inc. brainmass.com October 24, 2018, 8:16 pm ad1c9bdddf
A simple residence time in a reservoir calculation, which involves conversions from mm/hectare rain to "usable" units is provided in this solution.
Residence Time of Water
A stable and highly soluble pollutant is dumped into a lake at the rate
of 0.19 tonnes per day. The lake volume is 2E7 m3 and
the average water flow-through rate is 8E4 m3 per day. Ignore evaporation
from the lake surface and assume the pollutant is uniformly mixed in the lake.
What eventual steady-state concentration will the pollutant reach (in ppm)?
Hint: Calculate residence time of water in lake. Multiply by pollutant input rate.View Full Posting Details