Crumpled Paper Watershed Activity
Crumpled Paper Watershed Activity
Materials - Purpose:
Paper (recycle old 8.5x11 or other paper) - this forms the watershed base model
Newspaper- for clean-up (place under the model)
Permanent Markers (red, green, etc.) - for drawing landforms and native vegetation
Water-Soluble Markers (blue, black, brown, etc.) - for drawing water flow and point-source
impacts
Spray Bottle- For creating the precipitation
“A watershed is more than an area of land defined by its ridges with one outlet for water to flow.
A watershed supports a variety of resources, uses, and activities in such a way that eventually
all things are affected by everything else in the watershed. A watershed contains the history of
all that went before and the spirit of those who touched it remains.” George Wingate
What Is A Watershed?
A watershed is all of the land that drains runoff (from precipitation) into a body of water,
such as a creek, river, lake, bay or ocean. The boundary of a watershed is the ridgeline of
high land surrounding it, like the edge of a bowl. Another term for watershed is “drainage
basin.”
As rainwater and snowmelt run downhill, they carry whatever is on the land, such as oil
dripping from cars, trash and debris on streets, or exposed soil from construction or
farming to the nearest water body.
Estuary is a partly enclosed coastal body of brackish water with one or more rivers or streams
flowing into it, and with a free connection to the open sea
Estuaries form a transition zone between river environments and maritime environments and
are subject to both marine influences, such as tides, waves, and the influx of saline water; and
riverine influences, such as flows of fresh water and sediment. The inflows of both sea water
and fresh water provide high levels of nutrients in both the water column and sediment, making
estuaries among the most productive natural habitats in the world.[2]
Most existing estuaries were formed during the Holocene epoch by the flooding of river-eroded
or glacially scoured valleys when the sea level began to rise about 10,000-12,000 years ago.[3]
Estuaries are typically classified by their geomorphological features or by water circulation
patterns and can be referred to by many different names, such as bays, harbors, lagoons, inlets,
or sounds, although some of these water bodies do not strictly meet the above definition of an
estuary and may be fully saline.
The banks of many estuaries are amongst the most heavily populated areas of the world, with
about 60% of the world's population living along estuaries and the coast. As a result, many
estuaries are suffering degradation by many factors, including sedimentation from soil erosion
from deforestation, overgrazing, and other poor farming practices; overfishing; drainage and
filling of wetlands; eutrophication due to excessive nutrients from sewage and animal wastes;
pollutants including heavy metals, polychlorinated biphenyls, radionuclides and hydrocarbons
from sewage inputs; and diking or damming for flood control or water diversion.
Tributary or affluent is a stream or river that flows into a main stem (or parent) river or a lake.
A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river serve
to drain the surrounding drainage basin of its surface water and groundwater by leading the
water out into an ocean or sea.
A confluence, where two or more bodies of water meet together, usually refers to the joining of
tributaries.
The opposite to a tributary is a distributary, a river or stream that branches off from and flows
away from the main stream. Distributaries are most often found in river deltas.
'Right tributary' and 'left tributary' (or 'right-bank tributary' and 'left-bank tributary') are terms
stating the orientation of the tributary relative to the flow of the main stem river. These terms are
defined from the perspective of looking downstream (in the direction the water current of the
main stem is going).
Activity: Individual activity or small groups of 2 or 3 students. Loosely crumple paper (tight
crumpled paper makes for a more complex watershed model). Imagine being in an airplane
above this landscape. Find the tallest mountain or deepest canyon
Explain to participants that they will create a watershed model with a simple piece of paper. They
will be able to see the ridges, slopes and drainages that make up a 3-D watershed landscape. Be
sure to demonstrate and explicate each step so that there is understanding of how and why to do
each step.
1. Crumple a piece of paper into a ball. Gently un-crumple the paper so that it will sit on a table
but still maintain the folds and creases that will represent peaks ridgelines, valleys and
watercourses.
2. Use a permanent red marker to outline the surrounding watershed divide. If desired also
delineate all upward-pointing creases, which are ridges. Explain that although mountains
and landforms are not permanent they are a more durable aspect of the watershed. Ridges
define the boundaries of watersheds – Big watersheds are made up of
smaller watersheds. Even though defined by ridges they (WS) are named after the
rivers & streams.
3. Use the green permanent marker to indicate areas of native forests or other native
vegetation types.
4. Using the water-soluble blue marker, define the watercourses. These drainages are
the creases on the page that bend down toward the table, and should represent where
water will flow on the model.
6. With a water-soluble brown marker, create other ground disturbances. These can be
human caused or naturally occurring impacts (clearcuts, skid-trails, landslide, intensive
agriculture & grazing). The most significant pollution of surface water is sediment/soil.
8. Lightly and evenly spray the models. Explain that this is precipitation. They should carefully
watch and note how water flows across the landscape and how it affects the entire watershed,
not just the watercourses and channels.
Observe, Discuss and Record:
As your “rainfall” accumulates, observe the pathways where the excess “rainfall” travels.
1. What general observations did you make? Did water flow as anticipated?
2. Did you place your developments on a flood plain? What resulted?
3. Water cohesion allows for less impact (spread) on flatter surfaces than on slopes.where did
most of the impact/pollution come from?