Saturday, July 18, 2009
lols stressed on school projects...we had chemistry project, physics project and geography project. luckily we completed and handed up our physics project last Friday. Apparently KELVIN'S group did not do and was scolded by the teacher HAH!
Anyway, here are the human causes of floods:
- Clearing of forests - As you all know in the river chapter (directing to the PG), vegetation intercepts surface runoff and allows it to seep into the ground. But what happens when the vegetation are cleared for houses or other recreational uses? There will be no vegetation to hold the soil together and the bare slopes increases surface runoff. More eroded soil and surface runoff flow into rivers and therefore flooding occurs.
- Urban Development - Almost the same concept as the first cause. Usually, vegetation are cleared for urban development. The concrete floor does not allow rainwater or surface runoff to seep into the ground but instead allow it to flow into rivers. The river channel may not be able to hold the increased volume of water and therefore flooding occurs.
- Impacts of enhanced greenhouse effect - I don't know bout you all but when i see the word "greenhouse effect", it'll remind me of global warming. So how does global warming causes floods? Well, climate will change, possibility of more rainfall in wetter regions ( lols not religions - had a friend messed up the 2 words). Ice caps or cover in polar regions will melt, resulting in rising sea levels and possibility of floods for low-lying coastal regions.
There you go... The causes of floods. Let's watch some photos eh?
8:19 AM
