Practice Problems -Due next class period Fully describe how nitrogen (ammonia an dissolved oxygen problems in surface waters? Describe the processes of lake stratifica diagram or drawing that you have generated yourself. Identify a Nitrogen, Phosphorus, or Nutrient impaired water using the EPATMDL database and discuss the following items d nitrate) and phosphorus pollutants lead to tion and turnover in your own words, using at least 1 Provide a map of the watershed or find a photo specific to the watershed that shows o eutrophication. o What specific pollutant(s) drive eutrophication within the watershed? what point source and non-point source polluters contribute to the problem? o How much Nitrogen and/or Phosphorus is allowed on a water shed basis for the point source and non-point source polluters? As an avid outdoorsperson, explain whether you would swim or fish in this water? o Environmental Engineering Class 14 Limnology Solution Answer 1: Poor water quality in lakes can have many unpleasant consequences. Rough fish – such as carp and bullhead – populations increase at the expense of game fish populations. Severe nuisance algal blooms yield unpleasant odor and appearance that reduce the aesthetic appeal of lakes. This may result in declines in fishing and swimming and hurt tourism. As algae die and decompose, the process consumes oxygen. Submerged plants without sunlight die, decompose and consume more oxygen. Without enough dissolved oxygen in the water, fish and other organisms suffer and die because they can\'t “breathe.” This can occur locally or much farther downstream leading to degraded estuaries, lakes and reservoirs Answer 2: Lake is stratified on the basis of temperature difference along the lake depth. Also called as lake thermal stratification. Cold water is denser than warm water and the epilimnion generally consists of water that is not as dense as the water in the hypolimnion. There are 3 layers Lake turnover is the process of a lake\'s water turning over from top (epilimnion) to bottom (hypolimnion). During the summer, the epilimnion, or surface layer, is the warmest..

1. Practice Problems -Due next class period Fully describe how nitrogen (ammonia an dissolved
oxygen problems in surface waters? Describe the processes of lake stratifica diagram or drawing
that you have generated yourself. Identify a Nitrogen, Phosphorus, or Nutrient impaired water
using the EPATMDL database and discuss the following items d nitrate) and phosphorus
pollutants lead to tion and turnover in your own words, using at least 1 Provide a map of the
watershed or find a photo specific to the watershed that shows o eutrophication. o What specific
pollutant(s) drive eutrophication within the watershed? what point source and non-point source
polluters contribute to the problem? o How much Nitrogen and/or Phosphorus is allowed on a
water shed basis for the point source and non-point source polluters? As an avid outdoorsperson,
explain whether you would swim or fish in this water? o Environmental Engineering Class 14
Limnology
Solution
Answer 1: Poor water quality in lakes can have many unpleasant consequences. Rough fish –
such as carp and bullhead – populations increase at the expense of game fish populations. Severe
nuisance algal blooms yield unpleasant odor and appearance that reduce the aesthetic appeal of
lakes. This may result in declines in fishing and swimming and hurt tourism. As algae die and
decompose, the process consumes oxygen. Submerged plants without sunlight die, decompose
and consume more oxygen. Without enough dissolved oxygen in the water, fish and other
organisms suffer and die because they can't “breathe.” This can occur locally or much farther
downstream leading to degraded estuaries, lakes and reservoirs
Answer 2: Lake is stratified on the basis of temperature difference along the lake depth. Also
called as lake thermal stratification. Cold water is denser than warm water and the epilimnion
generally consists of water that is not as dense as the water in the hypolimnion.
There are 3 layers
Lake turnover is the process of a lake's water turning over from top (epilimnion) to bottom
(hypolimnion). During the summer, the epilimnion, or surface layer, is the warmest.