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QA/QC version based on v22 of EPA SWMM 5 with the ability to read older SWMM 5 OUT files. swmm5.dll Epaswmm5.exe
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Video: How Snowflakes Are Formed February 4th, 2012 | Posted by Jaime Menchén in Science Videos This time-lapse video lasts 11 seconds, with no music or voice-over. And still you’ll want to see it over and over again. The…
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This is a galaxy

This is a galaxy. Or is it? A remix of material originally produced for BBC Stargazing Live 2012 If you liked this video, follow me on twitter to hear about ...
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Fateme Fallah replied to Fateme Fallah's discussion 'Uncertainty Analysis'
Dear Lionel, This matter is explained in Appendix D of SWMM manual under the title of “Command line SWMM”. So in MATLAB you can use below format under DOS window: "The address of place that SWMM is there"   input…
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Robert Dickinson commented on Robert Dickinson's group 'Stream of Information'
Now the new images, courtesy of the Suomi NPP satellite (2012): The above two photos are pretty much what you would see with your naked eyes if you were at the altitude of this satellite.  It's humbling to realize that all you…
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Thanks Robert for your prompt help!
Thursday
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Lionel replied to Fateme Fallah's discussion 'Uncertainty Analysis'
Hi Fateme Fallah,   I am doing something similar but in my case I am varying the infiltration factor. I am not very good with Matlab so require a bit of help on the coding. I would like to check if you have been successful in your attempt to…
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Linking Matlab with SWMM5

Hi, I am currently trying to use Matlab to create a set of random values and inputting these random values into SWMM 5 to vary the different parameters (e.g. decay constant) so I will get a range of results. Has anyone done it before? Thanks!See More
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North Carolina City Chooses InfoSewer

North Carolina City Chooses InfoSewerArcGIS Based Sewer Modeling Package Helps Hendersonville, NC Model and Manage Its Collection SystemBroomfield, Colorado, USA, January 31, 2012Innovyze, a leading global innovator of business analytics software and technologies for wet infrastructure, today announced the City of Hendersonville, North Carolina, has selected InfoSewer for ArcGIS (Esri, Redlands, CA) as its sewer modeling platform.InfoSewer has helped define the standard in the industry for…See More
A blog post by Robert Dickinson was featured Tuesday
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North Carolina City Chooses InfoSewer

North Carolina City Chooses InfoSewerArcGIS Based Sewer Modeling Package Helps Hendersonville, NC Model and Manage Its Collection SystemBroomfield, Colorado, USA, January 31, 2012Innovyze, a leading global innovator of business analytics software and technologies for wet infrastructure, today announced the City of Hendersonville, North Carolina, has selected InfoSewer for ArcGIS (Esri, Redlands, CA) as its sewer modeling platform.InfoSewer has helped define the standard in the industry for…See More
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Welcome Oliver!
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oliver kemp is now a member of SWMM5 - Stormwater Management Model Jan 31
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Design Storms

Video posted by Robert Dickinson Jan 31

Early Modern Human Culture



Early modern Homo sapiens in Africa and Southwest Asia 100,000 years
ago made tools that were similar to those of the Neandertals and other late
archaic Homo
sapiens
These were mostly simple Mousterian-like Levallois flake and core tools.  However,
by 90,000-75,000 years ago
some modern humans began producing new kinds of artifacts that
were revolutionary enough to warrant their being placed into a different Paleolithic stage--the
Upper Paleolithic
This was the height of technical sophistication during the Old Stone Age.  These
innovative developments are most well
known from European sites, but similar advances were occurring elsewhere
in the Old World and later in the New World as well.  Foreshadowing these new
technologies
were harpoon-like bone projectile
points in use by at least 75,000 years ago in Central Africa.  Ultimately, there were a number of different
regional Upper Paleolithic tool traditions.  The most sophisticated may have
been the Magdalenian
click this icon to hear the preceding term pronounced

tradition of Western Europe.  It began about 17,000
years ago and lasted until the end of the last ice age around 10,000
years ago.



Paleolithic
Tool Traditions In Europe


 Paleolithic Stage 
of Development
Beginning
(years ago)
Cultural Tradition
Upper Paleolithic  17,000  Magdalenian
21,000 Solutrean
27,000 Gravettian
33,000   Aurignacian/Chatelperronian  
Middle Paleolithic     75,000+ ? Mousterian
Lower Paleolithic      700,000+ ?       Acheulian  

Note: the Acheulian Tradition began by at least 1.5 million years ago in
Africa.  It did not reach Europe until
much later when the first
humans
arrived.  The Mousterian Tradition very
likely began in Africa around
150,000-100,000 years ago.  The first upper paleolithic tool
traditions
probably evolved in Africa as well.


The various Upper Paleolithic tool traditions were successful cultural adaptations to diverse environments around the world.  In temperate and subarctic
regions of the northern hemisphere,
specialized big game hunting was the most
common subsistence strategy.  However, even among the societies that focused
their hunting efforts on reindeer, horses, and other large mammals,
there was exploitation of
vegetable foods, fish, and other small animals.  Upper Paleolithic peoples, such as the
Cro-Magnon of Europe, became progressively more efficient at acquiring food.  Small game
and plant food exploitation became increasingly important
to them after 15,000 years ago.  This was a
necessity because their populations apparently were growing rapidly and the
climate was changing as the ice began to melt near the end of the last ice age. 
This climate related change in subsistence pattern began even earlier in the
Southwest Asia and other relatively warm and dry regions.


The Cro-Magnon people increased their food supply by developing coordinated group
hunting
techniques for the killing of large herd animals, especially in the river valleys
of Western Europe and the plains of Central and Eastern Europe.  They also
developed new specialized hunting weapons.  The art of spear hunting was
revolutionized by the invention of the spear thrower (or atlatl
click this icon to hear the preceding term pronounced
)
about 17,000-15,000 years ago.  This was a wood or bone rod with a hook
on one end that fit into a socket at the base of a spear. 
This device was used to push off spears.
  It
increased the range and force of impact of
projectiles by essentially increasing the length of the spear thrower's arm.  The net effect was that hunters did not have to get as close to
prey before throwing their spears. 
Toggle-head
harpoons

click this icon to hear the preceding term pronounced

were invented about this time as well.  The
bow and arrow were invented by 12,000 years ago or a bit earlier.  This further
increased the range of projectiles.  The fact that these weapon
systems were developed toward the end of the last ice age is probably not a
coincidence.


drawing of an atlatl being used to throw a spear

Spear thrower


Note:  Spear throwers may have been made as early as 25,000 years ago in North Africa.  Whether the European Cro-Magnon people independently invented this technology later or acquired it from North Africa
is not known.


During the roughly 5,000 years of final glacial melt, large game animals became progressively scarce in the northern hemisphere.  As a result, human hunting success
would have been rarer.  The combined effect of
rapidly changing climates and increased hunting by humans heavily contributed to
the extinction of at least 50 genera of large animals (mostly mammals) at that
time.  It also was in this late
period after 15,000 years ago that fishing spears, hooks, and nets
became increasingly more common.  In Europe, the main focus of fishing
appears to have been salmon going up streams to spawn and seals that were
pursuing them.


The basis of many Upper Paleolithic stone tool forms was the blade flake
click this icon to hear the preceding term pronounced

This is a thin, roughly parallel-sided flake that is at least twice as long as it is wide.  The cross-section is usually either triangular or trapezoidal.  They were made out of brittle-breaking
rock materials such as
flint
click this icon to hear the preceding term pronounced
,
chert
click this icon to hear the preceding term pronounced
, and
obsidian
click this icon to hear the preceding term pronounced
.  Blade flakes were
preforms for the manufacture of many
different kinds of tools, such as knives, hide scrapers, spear tips,
drills, awls, burins, etc.


Photos of 2 tools made from blade flakes

European Upper Paleolithic tools made from blade flakes

 
  drawing of a prepared blade core being struck with an antler punch and an antler hammer
  Punch flaking
     

Blade flakes were nearly standardized shapes that were struck off assembly line fashion from a prepared core usually by punch flaking
click this icon to hear the preceding term pronounced
.  This
method uses indirect percussion to
better control the direction
and force of the shock wave
entering a core.  This facilitated the repeated production of long,
delicate flakes.  Blades were struck off around a
prepared core like the careful
unwinding and sectioning of a roll of paper.  It is
possible to knock off blade flakes with direct percussion using a
hammerstone rather than a
punch, but it is more difficult.


Tools made from blade flakes were far more efficient than core and flake tools made by earlier peoples when compared in terms of maximizing the use of precious brittle-flaking rock materials. 
This increased efficiency can be measured roughly in terms of the amount of
cutting edge that can be produced from the same amount of stone.
 


Tool Tradition and
Tool
Category
  Length of Cutting Edge  
Per Pound of Stone

(approximate)
Increase in Efficiency
  Over Previous Technology
  

(approximate)
  Oldowan choppers
  (Homo habilis)
2 inches

(5 cm.)
------
  Acheulian hand axes
  (Homo erectus)  
8 inches

(20 cm.)
400%
  Mousterian flake tools
  (Neandertal)
2 1/3 feet
(100 cm.)
490%
  Upper Paleolithic blade flake tools  
  (modern humans)
10-39 feet
(300-1200 cm.)
300-1200%

Sources: Watson, W. (1968) Flint Implements: An Account of Stone Age Techniques and Cultures;
             
Hester, J. and J. Grady (1982) Introduction to Archaeology.

Upper Paleolithic tool makers also invented a further refinement in working with stone.  After preliminary shaping by percussion flaking,
they often finished a tool with pressure flaking
click this icon to hear the preceding term pronounced
.  They literally pushed off the
edge flakes with the tip of a deer antler in the final shaping and thinning process.  This resulted in
small, regular flake scars and much greater control in determining the shape
of the final product.  Pressure flaking was also used to retouch, or
sharpen, thin edges of spear tips and knives.


photo of a long stone knife blade with small, uniform, parallel flake scars


         
drawing of a stone burin with its gouging chisel end highlighted
Burin made from
a blade flake

During the Upper Paleolithic, we see the first abundant evidence of tools for making other tools.  Such things as narrow gouging chisels, known as burins
click this icon to hear the preceding term pronounced
, were used to make and shape a host of
other implements out of bone, antler,
and ivory
.  Additional tools created for
the purpose of working on other implements such as pressure
flakers,
punches, and
spear shaft straighteners
.  The Upper Paleolithic
also saw a heavy dependence on compound tools, such as intentionally
detachable harpoon points and interchangeable spear foreshafts of hard wood attached to
spears.  Compound tools have the advantage that they can be repaired. 
When one part breaks, it can be replaced rather than replacing the entire
tool.


Compound tools and tools designed to work on other implements are not just new kinds of tools but rather new kinds of tool-using principles.  This was a giant intellectual leap
forward.  It also extended the range of raw materials that could be used for
tool making.  Bone and antler especially came into more common use. 
They had been used occasionally in the earlier Mousterian tool
tradition, but
were only modified clumsily by hammering, scraping, and burning. 
Among the Cro-Magnon people, bone and antler progressively
replaced wood and stone for many functions.  Bone and antler are
more durable than wood and more flexible than stone so they do
not break as easily and yet can be used to make relatively sharp cutting edges
and penetrating projectile points.  The
amount of time that they are still usable can be extended by resharpening when they
become dull. 
These materials were now being employed to make long thin knives, awls, sewing
needles, clothing fasteners, harpoons with barbs, and many other useful
implements
One result was that tailored clothing and tents were easier to make.  The
first known sewing needle came from southwestern France and dates to about
25,000 years ago.  Residues of animal skin pants, shirts, and shoes have
been found in a 22,000 year old Cro-Magnon grave near Moscow in Russia.


drawing of a bone sewing needle drawing of a bone harpoon point
Bone sewing needle  Bone harpoon point with barbs  

 
Upper
Paleolithic "Art"


The Cro-Magnon people of Europe regularly decorated their tools and sculpted small pieces of stone, bone, antler, and ivory.  Necklaces, bracelets, and
decorative pendants were made of bones, teeth, and shells.  Cave walls were
often painted with naturalistic scenes of animals.  Clay was also
modeled occasionally.  From our culture's perspective, these symbolic and
naturalistic representations would be referred to as art.  However, that
is an ethnocentric projection.  For the Cro-Magnon who made this art, it
was very likely thought of as being something different, or at least much
more, than we think of as art.  For instance, it may have had magical and/or
religious functions.


Upper Paleolithic European representational art began by at least 32,000 years ago and became
intense 15,000-10,000 years ago.  Perhaps, the most prominent portable art
was in the form that has become known as Venus figurines
click this icon to hear the preceding term pronounced

These are sculptures of women. 
They are not
portraits but rather faceless idealized representations of well fed, healthy,
usually pregnant nude women with
exceptionally
large buttocks and breasts.  Because of these
exaggerated sexual characteristics, they are thought by
most
paleoanthropologists to be ritual objects symbolizing female fertility. 
Many of these stylized carvings are reminiscent of modern abstract art.  Venus figurines
were made from 27,000 years ago down to the end of the last ice age 10,000
years ago.  They have been found from Western Europe all of the way to Siberia. 
Most were small enough in size to be easily hand held. 
The Venus of Laussel shown below on the right is a rare exception.
 


Photo of the Venus of Willendorf     photo of the Venus of Laussel
Venus of Willendorf
Austria
4 3/8 inches
(11.1 cm.) tall
  Venus of Lespugue
France
5 3/4 inches (14.6
cm.) tall
  Venus of Laussel
France

17 inches (43.2 cm.) tall

Not all of the portable art was in the form of Venus figurines.  Many small carvings have been found that depict animals and people, including men.

2 drawings incised bear teeth--one has the image of a fish carved into its surface and the other has a seal (both have single holes drilled through them to allow these ornaments to be suspended with string)

Carved bear teeth (from Duruthy Cave, France)

The Cro-Magnon people are, perhaps, most well known for their paintings on the walls of caves.  Although, this cave
art is
most abundant in southwest France and northern Spain, it was
made elsewhere by other early modern humans as well.  With cave art, we see the first large scale,
concrete symbols of human thoughts, feelings, and perhaps even beliefs about
the supernatural.  Over 150 Western European caves have been found
with these ice age paintings on their walls. 

3 photos of cave art--1st is a horse painting from Lascaux, 2nd is a bison from Altamira, and 3rd are deer from Lascaux
Cave art from Lascaux, France (left and right) and Altamira, Spain (center)

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