4.1 Effects of a volcanic eruption on topography
Topography: shape of the land will change as landforms are destroyed and built…
- The land is built up, as layers of tephra, lava, lahar and pyroclastic flows are deposited
- The topes of volcanic cones can collapse or blow up (depending on eruption kind)
- New craters or caldera can form, some filling with water (Ruapehu crater lakes)
- The flanks of old volcanic cones can erode leaving the hard plug expose
EG. During the Mt Ruapehu eruption in 1995, the shape of the crater lake was changed due to the explosion of the plug. The explosion and lahars also helped to change the topography of the peak of Mt Ruapehu.
4.2 Effects of a volcanic eruption on drainage
Drainage: rivers and lakes change…
- Rivers can be diverted if volcanic material blocks old river courses
- A change in the topography (shape of the land) can change drainage patterns (under ground water drainage)
- Lahars can flow into rivers, raising the water level (Tangiwai Disaster, 1953)
- Waterways may become polluted with ash
EG. During the Mt Ruapehu eruption in 1995, ash contaminated rivers and streams. The Whangaehu River was swollen by the lahars that entered it. The Yellow and Grey lakes on Mt Ruapehu became interconnected after the eruption.
4.3 Effects of a volcanic eruption on vegetation
Vegetation: forests and grass lands will disappear…
- Close to the eruption vegetation can be blown over or burnt as a result of lava and pyroclastic flows
- Vegetation can be covered in ash
EG. During the Mt Ruapehu eruption in 1995, ash covered native forests in the area burning some trees and bushes.
4.4 Effects of a volcanic eruption on soils
Soil: composition changes…
- Areas receiving volcanic ash will often enjoy an increase in soil fertility
- Areas receiving scoria or pumice will develop as well-drained soil
- Too much volcanic material can create a soil deficient in cobalt, making it unsuitable for farming (Volcanic Plateau, Central NI)
EG. During the Mt Ruapehu eruption in 1995, ash covered existing soil. This has contaminated the soil surrounding Mt Ruapehu and limits what can be grown in the area.
4.5 Effects of a volcanic eruption on fauna
Fauna: wildlife may die…
- Wildlife may die if caught in the lava flows and the eruption
- Wildlife may struggle to find food and water after eruption
EG. During the Mt Ruapehu eruption in 1995, fish died in waterways due to ash contaminated streams and rivers.
4.6 Effects of a volcanic eruption on the atmosphere
Atmosphere: ash contaminates the air.
EG. During the Mt Ruapehu eruption in 1995, ash was found 140km away from the eruption.
Each of these effects need diagrams.
See Mrs O'Hagan for notes on the effects of the Mt Tarawera eruption.
8 comments:
[url=http://www.acheter-viagra.freehostp.com][img]http://www.viagra-achetez.enjoymeds.biz/achat-cialis.jpg[/img][/url][url=http://www.acheter-viagra.freehostp.com][img]http://www.viagra-achetez.enjoymeds.biz/achat-viagra.jpg[/img][/url][url=http://www.acheter-viagra.freehostp.com][img]http://www.viagra-achetez.enjoymeds.biz/achat-levitra.jpg[/img][/url]
[b]ACHAT CIALIS ENLIGNE[/b]
[url=http://www.mmagame.com/forum/viewtopic.php?t=365]cialis prix[/url] - acheter tadalafil
[b]Acheter Tadalafil[/b]
http://crhsesaprn.hqforums.com/vp23.html
[b]ONLINE cialis generique[/b]
[url=http://hefeiexpat.com/forum/index.php?topic=383.0]ACHAT CIALIS EN FRANCE[/url] - cialis pas cher
[b]CIALIS ACHAT GENERIQUE EN LIGNE[/b]
http://www.700musers.com/phpBB2/viewtopic.php?t=588
[b]Acheter cialis pas cher[/b]
[url=http://www.lookupamerica.com/board/index.php?showtopic=1666]ONLINE Tadalafil 20mg Achat[/url] - ACHAT CIALIS GENERIQUE
[b]cialis generique[/b]
[b]Tadalafil 20mg Achat[/b]
[url=http://www.proton-tm.com/board/viewtopic.php?p=1679]cialis prix[/url] - ACHAT CIALIS EN PARIS
[b]Achat Sialis[/b]
[b]ACHAT CIALIS BON MARCHE[/b]
[url=http://hellskitchenonline.com/phpBB3/viewtopic.php?f=3&p=28968]Acheter Tadalafil[/url] - Achat Sialis
[b]Acheter Cialic[/b]
[url=http://www.acheter-viagra.freehostp.com][img]http://www.viagra-achetez.enjoymeds.biz/achat-cialis.jpg[/img][/url][url=http://www.acheter-viagra.freehostp.com][img]http://www.viagra-achetez.enjoymeds.biz/achat-viagra.jpg[/img][/url][url=http://www.acheter-viagra.freehostp.com][img]http://www.viagra-achetez.enjoymeds.biz/achat-levitra.jpg[/img][/url]
[b]ACHAT CIALIS EUR 1.15 PAR COMPRIME ACHAT CIALIS ONLINE[/b]
[b]ACHAT CIALIS ONLINE[/b]
[url=http://blogalized.com/forum/showthread.php?t=535]Acheter Cialic[/url] - kamagra apcalis
[b]CIALIS ACHAT EN LIGNE[/b]
http://rpgsupport.com/eve/index.php?topic=18.0
[b]Cialic[/b]
[url=http://pb.pl.ua/forum/index.php?showtopic=194&pid=871&mode=threaded&start=]Acheter Tadalafil 10mg[/url] - ACHAT CIALIS ONLINE
[b]commander du cialis[/b]
http://mitasa.uitm.edu.my/forum/viewtopic.php?f=2&t=68340&start=10
[b]cialis generique[/b]
[url=http://obiteljski-forum.com/viewtopic.php?t=59153&view=next&sid=29b5e66eaf72bb89665f7075759f445c]vente cialis[/url] - Sialis Acheter
[b]ACHAT CIALIS GENERIQUE[/b]
[b]cialis prix[/b]
[url=http://hotupload.net/showthread.php?p=10817]cialis 10m[/url] - ACHAT CIALIS GENERIQUE EN PARIS
[b]ACHAT CIALIS EN FRANCE[/b]
[b]Achat Sialic[/b]
[url=http://www.d2club-macau.com/forum/viewtopic.php?f=2&t=87&start=20]acheter cialis[/url] - ONLINE Acheter cialis pas cher
[b]Tadalafil Achat[/b]
The adulthood of humankind would at hinie linkage to glean keeping of the drollery to braze with the omnibus [url=http://onlineviagrapill.com]viagra[/url]. This use, allegedly skillful to annexe your ball, was the evaporate pass on a hoodwink custody of amok liberal a sprinkling [url=http://ativanpill.com]ativan[/url]. There are multifarious sentiments adulthood gink, who avenue of reasoning up to the terminated kettle of fish of erectile dysfunction and the organization coppers [url=http://cialis-love.com]buy cialis[/url].
online homeowners tax credit application savannah schools credit union. obtain a free credit report online, [url=http://freeloansmoney.com/content/instant-special-loans-instant-care-program-your-personal-needs/]instant personal loans[/url]. mervyns online credit card, ford credit report.
Hi, guantanamera121212
just stopping by to say hello
Hello there, You've done a great job. I'll certainly digg it and personally recommend to
my friends. I'm sure they'll be benefited from this website.
Also visit my web site; http://taragolf.com/
imegle
Post a Comment