ENVE3503 Environmental EngineeringPopulation Growth

Exponential Growth

Exponential Growthexponential growth model, withX0 = 1 = 0.69 d-1104857652428826214413107265536327681638481924096204810245122561286432168421

The Death Term

Limits to Exponential Growth(non-renewable and renewable resources)http://wildgoosechasing.blogspot.com/2007/12/experts-world-population-will-explode.html

Logistic Growth (limitation by non-renewable resources)

http://www.cbc.ca/gfx/images/news/photos/2008/06/27/f-un-food-distribution-584.jpgLimits to Exponential Growth(non-renewable and renewable resources)

The Monod Model (limitation by renewable resources)Substrate ConcentrationGrowth Rate

The Monod Model (limitation by renewable resources)

The Yield Coefficient (linking substrate depletion and growthBiomass, SubstrateTime

Life at carrying capacity Consider the differences in life at carrying capacity for non-human and human populations.

A catastrophe of Malthusian proportion How may humans experience misery and vice in a catastrophe of Malthusian proportions?

Soiling the global nest What is the role of the environmental engineer in restoring the Earths carrying capacity?

Can you think of an example where this has been accomplished?carrying capacity, K

IPAT: the elephant in the global living room

IPAT and the environmental engineerthetechnologicalsolution

IPAT and us thesocialsolution

Farmer Bean and Her PigsDrawings by Bill Sproule