Survey ID：2525
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Survey ID: 2525

USER-347806-Shimo

2.3 (2)
  • Update：Aug 20, 2022 05:25 +00:00

Photo（7）

Natural state

① Is there an abundant flow of water?

Abundant flow
Some flow
No flow

② Does the riverbank look natural?

Natural
Restored, but looks natural
Restored with much concrete

③ Can fish go upstream?

Fish can go upstream
Fish can use fish ladder
Fish cannot go upstream

Biological diversity

① Are plants growing along the riverside?

Abundant variety of plants
Plants are here and there
No plants

② Are there birds?

Many birds and habitats
Not many birds or habitats
No birds or habitats

③ Are there fish?

Many fish and habitats
Not many fish or habitats
No fish or habitats

④ Are there living things on the bottom of the river?

Slight algae, some insects
The surface of the stone is slippery due to algae
The bottom looks dark, and no algae or insects

Water clarity

① Is the water clear?

70 ≦ X
(cm)
50 ≦ X < 70
(cm)
X < 50
(cm)

② Does the water smell?

No smell
A slight smell
A very bad smell

③ Is the water clean?

X ≦ 3
(mg/l)
3 < X ≦ 5
(mg/l)
5 < X
(mg/l)

Pleasant waterfront

① Are the river and its environ. beautiful?

Beautiful
Average
Not beautiful

② Is trash visible?

No trash
Some trash
A lot of trash

③ Do you want to touch the river water?

Want to touch
Don't mind touching
Don't want to touch

④ What do you smell along the riverside?

A pleasant smell
No specific smell
An unpleasant smell

⑤ What do you hear along the riverside?

The pleasant sound of the river
No specific sounds
Unpleasant sounds or noises

Regional culture

① Have you ever heard stories related to the river?

Have heard many stories
Have heard some stories
Have heard no stories

② Is the riverside accessible?

Can touch the water
Accessible but cannot touch
Cannot see the riverside

③ Do many people use the river or riverside?

Used by many people
Used by a few people
Not used

④ Are there any industrial activities that utilize the river water?

Used for important activities
Used for some activities
Not used
汐留川水門

⑤ Are there any environmental activities on the river?

Many activities
Occasional or Temporary activities
No activities
ウォーターズ竹芝

Photo ID:

  • Natural state
  • Biological diversity
  • Water clarity
  • Pleasant waterfront
  • Regional culture
See survey result

River revetments

River revetments are structures designed to prevent erosion of river banks and embankments by floods.

Fish ladder

When a dam or weir is built, fish and other aquatic organisms cannot go upstream of the weir, so it was built as a path to help them return to the river.

Habitats

A habitat is a place where living things live. Conservation of habitats leads to conservation of living things.

Transparency

The transparency is an index used to express the clarity of the water, and the higher it is, the clearer the sample is.

COD

COD is the amount of oxygen required to oxidize oxidizable substances in water and is one of the typical indicators of water quality (also called Chemical Oxygen Demand). The higher the value of COD, the higher the amount of organic matter.