Translations:Adventist Youth Honors Answer Book/Nature/Environmental Conservation/13/en

b. Signs of Stream Deterioration and Death

• (1) Large masses of blue-green algae present (dark green in color)

• (2) Scoured banks from high water level during storms

• Iron hydroxide precipitate in stream.jpg

  (3) Putrid smell of the water

• Pollution Tietê river.JPG

  (4) Detergent foam present

• Arroyo Ludueña 8.jpg

  (5) Trash sticking out of mud and sand bars along the stream

• PlumCreekMinnesota.jpg

  (6) Water loaded with silt

• Sivadeule travaux juin 2001Gabions.jpg

  (7) No aquatic insects or fish present

• (8) Presence of raw sewage

• Oil sheen on pond.jpg

  (9) Presence of oil on the surface of the water

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  (10) No salamanders or frogs under rocks along stream bank

• Water pollution.jpg

  (11) Stores or small factories dumping their wastes into the stream