Watershed Tutorials

The use of pesticides and fertilizers must be carefully monitored 
because of the effect they can have on the environment. 
Which of the following is a possible negative effect of the use 
of these chemicals on the environment?

• Runoff carries these chemicals into lakes and streams.
• Theses chemicals cannot be purchased in large bulk.
• 
  These chemicals are expensive to produce.
  
• Storage space for these chemicals is limited.

What is a watershed?

• Land that collects and channels water froma small body of water to a larger body of water
• the shape of the land determined by elevation
• A natural stream of water of considerable  volume
• a river and all its tributaries

Why is gravity a factor in watersheds? 

• it causes the water to flow away from a watershed
• it causes the water to flow down towards a watershed

What is Point Source Pollution (PSP) ?

• When you cannot trace the direct source of pollution
• When you can trace the point of the source - "pipe to source"

A lake that stores water for human use is called a ____________.

• dam
• oxbow lake
• reservoir
• crater lake

The build up of nutrients in a lake is a process called ________________.

• eutrophication
• volcanic eruption
• algae buildup
• pond death

When fertilizers enter surface water, they cause problems in 
the watershed by -

• increasing the amount of nutrients available to fish in lakes and streams.
• 
  clogging narrow streams and preventing water from flowing properly.
• raising the water level in nearby rivers to levels leading to flooding.
• causing rapid algal growth that decrease oxygen levels and choke aquatic life.

A collection of watersheds all discharging into the same major body of water is referred to as a 

• watershed.
• drainage basin
• river system
• wetland

A industrial powerplant dumps its heated wastewater straight from a pipe into a stream. This is an example of -

• eutrophic pollution
  over-treated drinking water.
• riparian pollution
  flooding in the local aquifer.
• point source pollution.
• nonpointsource pollution.

Pollutants from a factory enter a stream or creek and travel to a river. River water tested with the pollutant found is called  

• point source pollution
  Available space for crops
• nonpoint source pollution.
• eutrophic pollution
• riparian pollution