Watershed

What is a watershed?

• Watershed is when water runs down a hill

• watershed is when runoff and groundwater drain into a body of water.

• watershed is when water falls from the sky

What does this picture show?

• Precipitation

• Runoff

• Watershed

What is the Brown showing?

• Precipitation

• Runoff

• Groundwater

What is groundwater?

• Water that moves underground

• Water that runs downhill

What is the cause of this?

• runoff

• groundwater

• pollution in watershed

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.

Pollutants from a factory that enter the water in a watershed 
will have a negative effect on which of the following?

• 
  Available space for crops

• Local pond life

• Rainfall rates

• Direction of river flow

The use of pesticides and fertilizers is 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 chemical 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.

Pollutants from a factory that enter the water in a watershed will have a negative effect on which of the following?

• Available space for crops

• Local pond life

• Rainfall rates

• Direction of river flow

Land that supplies water to a river system.

• wetlands

• watershed

• estuary

• river system