flood

A flood can happen almost anywhere. In wet areas they are expected, but in dry regions they are usually the more dangerous flash floods.



The two main reasons a flood happens are when rain builds up faster or just too much for the ground to soak in, or when a dam (either natural e.g. debris like sticks, or man made) collapses.



Since soil in its dry form is hydrophopic (doesn't absorb water at first) the water just forms a wall that easily sweeps any thing in its path up. this is why floods in dry areas are usually more dangerous than those in wetter ones (that and the fact that in dry areas flood protection is not as great).



Predicting floods is as simple as predicting rain fall, which is just cloud position, type, and temperature; though this will only work if it is a flood caused by just rain and not a dam collapsing (which is usually caused by rain, but still mainly unpredictable).



If a flood can be predicted, an evacuation notice will be given for all those in the path, as well as estimated time until it strikes so posessions can be gathered.







http://www.fema.gov/hazard/flood/index.shtm
http://www.bom.gov.au/hydro/flood/flooding.shtml
http://en.wikipedia.org/wiki/flood

Tuesday, November 23, 2010

Question 5

1,3(a)Most earthquakes and volcanoes occur at the plate boundaries where two plates collide and diverge. The ways for classifying volcanoes are shown below, and the ritcher scale is used for earthquakes.


1,2(b)There are four main types of volcanoes. They are cinder cone, composite, shield, and lava dome.

A cinder cone is made when lava with lots of pressure is blown into the air, as the globs fall they cool into cinders that form a cone around the vent. Paricutin in Mexico is an example of this.

Composite volcanoes are formed from alternating layers of lava, ash, and cinder. they are steep sided and are the largest of volcanoes. Mt st helents is an example of this.

Shield volcanoes are large, flat volcanoes formed when fluid lava pools outward over an area. Hawiian volcanoes are an example of this.

Lava domes are fomed when the lava is too fluid to really go anywhere so it piles up inside the cone, this eventually builds pressure to form a violent ezplosion, Mt Pelee is an example.

1,4(c) Volcanoes have an impact on the atmosphere by blowing ash into the air, which blocks light. They can poison the water and affect the temperature (both heating and cooling)


bibliography
1 Principal types of volcanoes,USGS,http://pubs.usgs.gov/gip/volc/types.html,2/6/97

2 Types of volcanoes, Oregon State University, http://volcano.oregonstate.edu/vwdocs/vwlessons/lessons/lesson6.html

3 eathquake measurement, Geography.info, http://www.geography.info/earthquakes/10/earthquake_measurement.html, 2006

4 How volcanoes affect the climate, scientific american, http://www.scientificamerican.com/article.cfm?id=how-do-volcanoes-affect-w, 10/4/05

Pics
http://www.solcomhouse.com/images/volcanotyypki.jpg
http://comp.uark.edu/~sboss/tectonic14.gif
http://www.istockphoto.com/file_thumbview_approve/5743532/2/istockphoto_5743532-destruction-and-aftermath-of-earthquake-or-natural-disaster.jpg

Wednesday, November 3, 2010

connections

in activity 1 the the experiment was what material common or like those in soil absorbed the most heat. the dark material absorbed the most, the light material was in the middle, and the water reflected a lot, but it was in reverse order for losing heat. this was what i had predicted.

in activity 4 the same materials were in bottles, but the temp of the air was measured. on the second set of bottles white paint was put to mimic clouds. the bottles there were cooler. the other measurements were the opposite of 1 because it was heat reflected instead of heat absorbed measured

this shows how different soils react to light, and the effect of clouds on temperature. it is not relevant to my climate beacause im doing floods.

Wednesday, October 13, 2010

sewage

at the plan that we went to i learned how our water is treated after our use. we saw all of the processes and learned some of the history of the plant. we also learned how things are different at the plant during different times of the year, and how they deal with things like power outages.

my family already recycles, so this is nothing new, and we are still recycling. (we had just recently brought our recycling to there before the trip, so i couldnt bring anything there)

Tuesday, October 12, 2010

city talk

1 I could not log in at the time, and cant remember her name.she worked for the city hall.
2 sent it through drains to purify it.
3 runoff from the streets will be treated before going to the river.
4 excused due to bronchitis
5 there will be a city barbecue to celebrate end of constructon
6 the tadpole in the pollution bottle died
7 dont know
8 cant get the program to load

Wednesday, September 15, 2010

water field trip

1yesterday we went to the water facility. 2i learned that there is over 30 miles of pie in the city. 3oops, that was supposed to be pipe. 4oh well, too bad, that sounds delicious. 5back on track, we saw the place where water is tested for contaminents. 6we heard the history of the system from the guide. 7his name was dave. 8we also learned how the water keeps going even when the power is out.

Monday, September 13, 2010

water

our water comes from the grand river

they use reverse osmosis and bacteria to treat it
they also use sand filters

Wednesday, September 8, 2010