Why does white water rafting damage river and streams?
White water rafting damage river and streams because Riverbeds are dredged to eliminate hazards.
Why does white water rafting damage river and streams quizlet?
Whitewater rafting has a potential negative effect on river ecosystems. Oftentimes, companies dredge the riverbeds to remove sediments. They want to get rid of some of that dirt that’s on the bottom of the river.
Where is oxygen content in a river or stream likely to be highest?
Oxygen levels are higher at the source of rivers and streams, so organisms that require higher levels of oxygen will be found there. Organisms that require lower levels of oxygen will be found nearer the mouth.
Which human practice can cause flooding a white water rafting B tubing C walling off rivers D picnics e dredging water beds?
Answer Expert Verified The human practice can cause flooding E) dredging water beds. The main cause of flooding the industrialization and dredging waters beds is one of the major part of agricultural operations.
Which human action has heightened the danger of flood?
Deforestation
How can humans impact flooding?
Human causes of flooding Constructing buildings and surrounding roads and paths creates impermeable surfaces which increase surface run-off. Drains also increase the flow of water into surrounding rivers, increasing the flood risk.
Which of the following best describes how a frozen river can cause a flood?
Rivers that are covered in ice can also lead to flooding. When ice begins to melt, the surface of the ice cracks and breaks into large pieces. These pieces of ice move and float down the river. They can form a dam in the river, causing the water behind the dam to rise and flood the land upstream.
What kind of diseases are common after an occurrence of floods?
Floods can potentially increase the transmission of the following communicable diseases:
- Water-borne diseases, such as typhoid fever, cholera, leptospirosis and hepatitis A.
- Vector-borne diseases, such as malaria, dengue and dengue haemorrhagic fever, yellow fever, and West Nile Fever.
How a frozen river can cause a flood?
a)The ice in the river melts too quickly and causes a flood.
Do dams cause floods?
When a dam breaks along a reservoir, flooding can be catastrophic. High water levels have also caused small dams to break, wreaking havoc downstream. A levee in one location may just force the high water up or downstream and cause flooding there.
What will happen if dam overflows?
If the water overflows the main dam then the current can cause erosion of dam and weaken it. The dam may breach because of high pressure build up or erosion due to overflow.
What is the main problem with dams?
As explained, the dams will bring more problems than they will solve. Hydropower dams flood large areas, force people to relocate, threaten freshwater biodiversity, disrupt subsistence fisheries, and leave rivers dry – substantially affecting the ecosystem.
How do dams cause problems?
Dams store water, provide renewable energy and prevent floods. Unfortunately, they also worsen the impact of climate change. They release greenhouse gases, destroy carbon sinks in wetlands and oceans, deprive ecosystems of nutrients, destroy habitats, increase sea levels, waste water and displace poor communities.