Lab 6 - Leslie Martinez
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Feb 20, 2024
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Lab 6: Leslie Martinez
Part 1: River Response to Disturbances
https://ag.arizona.edu/extension/riparian/chapt4/p7.html
Using Lane's balance as a guide, indicate what the river response would be for the scenarios listed below.
Possible answers are Degradation, Aggradation, or Negating effects.
Negating effects means that the disturbance may cause both aggradation and degradation so the effects may partially or totally cancel each other out, so it is uncertain what the response may be.
1.
A river is diverted into a new channel that is less steep and has a greater supply of coarse sediment
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Aggradation
2.
A water diversion project started to remove water from a river channel for irrigation
-
Aggradation
3.
A river is diverted into a new channel that is steeper and has a greater supply of coarse sediment -
Aggradation
4.
Climate change in a region caused greater rainfall, resulting in higher steam discharges -
Degradation
5.
A land stabilization project has reduced the amount of sediment entering a river channel -
Degradation
6.
Volcanic or tectonic uplift caused a river channel to become steeper -
Degradation
7.
A construction project has steepened the slope of a river and decreased the amount of sediment entering the channel -
Aggradation
Lab 6: Leslie Martinez
8.
The building of a dam has decreased the amount of sediment and decreased the amount of water flowing into the channel downstream -
Negating Effects
9.
The clearing of a forest has increased both the amount of water and sediment entering
a river channel -
Negating Effects
10.
A landslide delivered a large amount of coarse sediment into the river -
Aggradation Part 2: Climate Change Indicators - Oceans and Coastal Areas
The US Environmental Protection Agency (EPA) has an informative website that describes over 50 indictors that show the causes and effects of climate change. Spend a little time exploring this site (
https://www.epa.gov/climate-indicators Links to an external site.
).
Let's focus on climate change indicators related to oceans. To do this, review the following website (
https://www.epa.gov/climate-indicators/oceans Links to an external site.
) and the links to the five indicators of climate change related to oceans within the website. Then, answer the following questions: As always, you should paraphrase information on these webpages using your own words, provide answers that are of sufficient length, and avoid quoting!
1.
What are the five major indicators or impacts of climate change on oceans and coastal areas discussed in this reading?
Don't simply list the five indicators stated in the reading - provide some details to describe them.
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The five major indicators or impacts of climate change on oceans and coastal areas discussed in the reading can include, high ocean temperatures, coastal floodings, rising sea levels, the ocean acidity and rainfall. All five major indicators impact oceans and coastal areas, high ocean temperatures cause the sea levels to rise and cause glaciers to melt. The rise in sea levels causes coastal flooding, damages in coastal areas and causes storm surge, the increase in heavy rainfall also causes flooding. Due to the carbon dioxide in the atmosphere, this has caused the ocean become acidic, this impacts the fish and other organisms, “Higher acidity affects the balance of minerals in the water, which can make it more difficult for certain marine animals to build their protective skeletons or shells” (Climate Change Indicators). 2.
Choose one indicator or impact of climate change discussed in this reading to describe in greater detail. As part of your answer, explain how people living in coastal communities might be especially at risk from this impact
Lab 6: Leslie Martinez
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Rising sea levels are being caused by global warming, sea levels have been rising for many years, “Average sea level risen at a rate of 0.12 to 0.14 inches per year, roughly twice as fast as the long term trend.” (Climate Change Indicators). The rise of sea levels can be also caused by the ice sheets and glaciers continuing to melt day by day due to the warmer temperatures in the ocean. The rising sea levels affect us humans in coastal communities, these rising sea levels cause flooding, erosions on beaches and effects on the groundwater aquifers. People living in coastal communities are at risk due to the rising sea levels, major flooding is the biggest factor that impacts homes and farmland. 3.
For the indicator "sea level", explain why it is helpful to distinguish between “absolute” sea level change and “relative” sea level change?
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It is helpful to distinguish between “absolute” and “relative” sea level change because both absolute and relative sea level change are both very different. Absolute sea levels have changed averaged over most of the ocean surface while relative sea levels have risen in sea levels but have also fallen in different locations. The multi-year cycles have caused the change in absolute and relative sea levels. (Climate Change Indicators).
4.
What would your response be to rising sea levels if you owned a beach house that was being threatened? Please provide specific examples/ideas.
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My response to the rising sea levels if I owned a beach house that was being threatened was that climate change plays a big role in the rising sea levels. I would be concerned about my communities houses, farmland, beaches and overall
land. Global warming is causing the water to rise due to the ocean water getting warmer which is melting the ice sheets and glaciers. I think families will move due to the fear of the sea levels becoming too high and damaging their homes.
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