BIOGRAPHY OF A RIVER

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wind. Sometimes the wind blows out to sea.Teacher Sheet (cont.)Ask students:1. What is a delta?2. What causes deltas to form?3. What forms the shape of a delta?Not all forms of pollution are bad. Deltas are important. Water, picking up dirt and moving it around,formed such important land masses as the Mississippi Delta and the Nile Delta. Sediment also formed thefertile lands on either side of the Nile River. Think of other agriculturally important places that depend onthis process.3-6
CATCH ME IF YOU CAN --9-12 (TWO WAYS TO MEASURE STREAM FLOW)OBJECTIVESThe student will do the following:1. Compute the amount of water that flows through a stream.2. Demonstrate an understanding of the data from USGS thatare used to monitor stream flow.SUBJECTS:Math, Science (Physical),Social Studies (Geography)TIME:1-2 class periods(field trip to stream)3 Explain the influence a particular amount of rainfall may have onthat stream.BACKGROUND INFORMATIONStreams, rivers, and even small tributaries have large demands put uponthem by having supply waters pulled from them and by the addition ofdischarge waters from various sources. The capacity of any tributary, nomatter how large or small, must be taken into account before it can be usedfor a water supply source or a discharge receiving stream.MATERIALS:topographical map ofcommunity (USGS)dot grid/graph paperfloating device(orange or lemon peel)stopwatch or clockmeasuring tapegraph paperUSGS data on stream flowclothes OK to get wetStorm water that moves across the surface of the land is called runoff.Factors that influence runoff to a stream include watershed size, slopes, soil types, land use, and vegetation.It is important to understand the correlation of these factors to actual water flow in a stream. A sounddecision about water consumption or discharge for a given community should be based on this knowledge.(Other factors, such as the water needs of local wildlife and vegetation, also should be taken into account.)TermsAF: (acre foot) - volume of any substance required to cover one acre of a surface to the depth of 13 3ft (43,560 ft ) or (1232.75 m )runoff: water (originating as precipitation) that flows across surfaces rather than soaking in; eventuallyenters a waterbody; may pick up and carry a variety of pollutants3-7
Page 4: B. Read descriptions of rivers in l
Page 10 and 11: III.Depending on the units used for
Page 13 and 14: . Be sure that the water supply pai
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Page 17 and 18: 1. the littoral zone: shallow water
Page 19 and 20: profundal zone: a zone in a lake ex
Page 21 and 22: 5. Alternative to this would be to:
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Page 27 and 28: algal bloom: a sudden increase in t
Page 29 and 30: 3-29Student Sheet
Page 31 and 32: manufacturing and for removing the
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Page 39 and 40: Termsdam: man-made or animal-made b
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Page 45 and 46: so that the forests can continue to
Page 47 and 48: II.ActivityA. Determine whether the
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POLLUTANTS: HOW MUCH TOTALOR HOW MU
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A. Explain to students that they wi
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III.Follow-upA. To explain further
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3-61
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PROCEDUREI. Setting the stageA. Stu
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Diseases Organisms Associated WithM
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E. The disc should be lowered until
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eutrophication: the process in whic
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Chiras, Daniel D., Environmental Sc
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observe effects of iron on plants.
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3-89
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THERMAL POLLUTIONOBJECTIVESThe stud
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D. The teacher should do the agitat
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BIOGRAPHY OF A RIVER

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