answersLogoWhite

0


Best Answer
Answer

A dam was built in Canada years ago. And one day the controller thought that the water level was too high so he let the water run out into the river that had been dammed.

It just so happened that a large group of migrating cariboo wanted to cross that same river that same day. Needless to say the water level was so high in the river that all the cariboo drowned and never made it to the other side.

So my answer is: Maybe nothing bad will happen to us, but maybe a lot of bad things will happen the animals near the dam.

Obviously, a large area is submerged when a dam is built, and this may be home to unique and endangered flora and fauna. Water which flows from hydroelectric dams is from the bottom of the dam where it is cold, dark, low in oxygen, and almost lifeless. This affects the ecosystem for many miles downstream.

Benefit

The reservoir created by a dam, while taking away some terrestrial habitat, can improve wetland, shoreline, and aquatic habitat.

Another perspective...

I have not heard of any examples of reservoirs improving wetlands except maybe in arid climates, but then many types of wetlands do not naturally belong in arid climates. Also, they do not create aquatic habitat so much as just change it from a naturally flowing wild river to a lake, which is a completely different water body and supports a completely different ecosystem.

Dams do provide more shoreline probably, and also help control water supply, generate electricity, improve agriculture, help in flood control, and provide additional water contact recreational opportunities.

However, dams are, by and large, damaging to the environment. They disrupt the natural flow regime of a river, disconnecting the river from its flood plain. The previous commenter mentioned dams improving wetlands. That may be true around the reservoir, but usually, all the wetlands wetlands below the dam suffer and often disappear completely.

We like to think that reservoirs help to improve water supply and aid in flood control, but sometimes, dams can have exactly the opposite effect. In many years, average rainfall will result in our ability to operate dams to their full effect, capturing more the snowmelt, reserving water for increased demand later in the year, controlling potential flooding from heavy rainstorms, etc. And while engineeers have done a lot of good for us, I have zero confidence in the ability of engineers to overcome nature in the long run. A river and its wetlands are already designed to deliver exactly the amount of water for natural communities in the watershed. Wetlands have numerous functions essential to healthy riverine processes. They serve as habitat for aquatic and terrestrial wildlife, serve as nurseries for young fishes and amphibians, and help filter out pollutants. They also act like sponges, absorbing water during the spring melt and releasing it back to the river later in the year when the river requires more water. All of those ecosystem functions may be taken away when a dam is built.

In addition, natural communities in the river are adapted to river life. Dams interrupt those communities. Dams are responsible for endangering numerous species, including salmon and freshwater mussels. They are hurting salmon by impairing the ability of adult salmon to swim up their home rivers to spawn, and also impede the ability of spawned salmon fry to swim downstream as they migrate toward the ocean. Also, as a family, the Unionidae (freshwater mussels) are probably the most endangered family of any in the animal kingdom. Most freshwater mussels require flow, an some exist in very localized populations. So when a dam is built and suddenly there is no flow, whole species of mussels may go extinct, and many probably already have.

Unintended consequences

Many dams have been built to control the flow of rivers. Recent flooding in the midwestern United States is thought to be caused not by climate change but the fact that the dams have allowed silt to build up and, in effect, have shallowed the riverbed. Periodic natural flooding creates a deeper channel and lessens the severity of future flood events, and this is not possible with the system of dams the way it is.

User Avatar

Wiki User

โˆ™ 2009-09-26 04:34:28
This answer is:
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
User Avatar
Study guides

Botany or Plant Biology

23 cards

What role do bacteria play in the carbon cycle

What is the name of the process where plants release water from their leaves

Where does nitrogen from the atmosphere go before it enters a plant

What process leads to water entering an aquifer

โžก๏ธ
See all cards

Add your answer:

Earn +20 pts
Q: What will happen to the environment if a dam is built?
Write your answer...
Submit
Related questions

What will happen if a dam is built?

if a dam is built it will block the water from over flowing and ruining thesurroundings!!!!!!!!!!h iI'mnew so if anyone whats to talk go ahead!!!!!!!!!!


When a dam is built in a hot dry area creating a lake or reservoir above the dam how does the evaporation from that reservoir affect the environment?

It decreases the amount of water in the river -APEX


Who built Itaipu dam?

Who built Itaipu dam?


What will happen to the environment if a dam is build?

all know animal,plant and insect life will be obliterated.no dam is justifiable.people must learn to live without electricity.


How humans modify environment to protect themselves?

how did modifing Corps of engineers built levees to channel the rivers, built dam projects such as TVA


When was th aswan dam built?

The Aswan Dam was built in 1968 and they finished the Dam in 1970.


What is the effect of tehri dam on environment?

what is the effect of tehri dam on environment


Why is the gorges dam in china being built?

The dam is being built for the same reason Hoover Dam was built; to use hydroelectric power to make electricity.


Name the dam built on river jhelum?

the dam built on jhelum is mangla dam


When was the aswan dam built?

The Aswan dam was built in 1970 Actually, the Aswan dam was built in 1968, and they finished in 1970. In actual life, it was built in 1960 and finished in 1970


How did the Tarbela Dam response to pakastans climate?

the dam built the dam


What will happen if water falls from a dam?

what will happen if falls from a dam


Where was aswan dam built?

there are two dams at Aswan the first is Aswan dam which built at the first cataract at Aswan city, the second is the High dam built south of the first one


When was aswan dam built?

The Aswan High Dam, commonly referred to as just the Aswan Dam, was built between the years of 1960 and 1970. The Aswan Low Dam, or Old Aswan Dam, was completed in 1902.


When was the Itaipu dam built?

the Itaipu dam was built in February 1971 I DID MY RESEARCH


Who built the aswan dam?

Jason Akhlabalkinoy built the Aswan dam in Egypt in 1960 and 1970


Why was the akosombo dam built?

The Akosombo Dam was built to create hydroelectricity (energy/electricity) for Ghana.


How many dams were built on jhelum river in Pakistan?

the dam built on jhelum is mangla dam


Which river is the Koyna dam built across?

The Koyna dam is built across the Koyna River.


What year was the first dam built?

It is believed the first Dam was built about 2600 or 2800 BC


How was the Hoover Dam built?

Well constructors built the Hoover Dam with concrete and mixing stuff.


What monument was removed when asam dam was built?

There is a dam at Assam in India, but no monument was moved. There is the Aswan Dam in Egypt and when it was built the Temples of Abu Simbel had to be moved and re-built.


Which dam is built on Mahanadi river?

The Hirakud Dam.


What dam was built across the Nile?

Aswan Dam


What might happen to organisms living fast moving river if a dam is built on the river?

3 options it will move, adapt, or die.

People also asked

What causes bright yellow urine?

View results

How long does it take for report cards to mail to your home?

View results

How do you spell nessicarily?

View results

What song did Michael Jackson first perform the moonwalk to?

View results

What languages does Martina Hingis speak?

View results