|
|
|
 |
|
|
|
|
|
|
Excavation
|
A
concrete tank would obstruct the running water, if an
unexpected flooding occurred. |
Aeration
|
None.
|
Sludge Removal and Sludge Treatment
|
A
sludge removal is
done in winter.
|
Water Gathering Facility
|
Should
be built with soil-sand-proofs.
|
Specifications
|
Actual Retention Time: 0.5h |
| Flow-Down Distance: 5m |
|
|
|
|
|
Jarikko Purification
Facility is built outside the lake just like the one built for the
river. The structure of the facility is the same as the structure
of the one for the river.
|
|
|
|
Place
|
Operating
Organization
|
Chlorophyll a (µg/l)
|
Raw Water
|
Purified Water
|
Removal Rate
(%)
|
Yakushi Pond
|
Machida City
|
106
|
15
|
85.6
|
Kogai River
|
Japan Water Agency
|
10
|
4
|
63.5
|
Nomadai Pond
|
Fukuoka City
|
14
|
1
|
91.9
|
Tega Pond (Outflow Water)
|
Tone River Downstream Office
|
94
|
13
|
85.9
|
Noda City Park Pond
|
Noda City
|
50
|
10
|
80.0
|
Pompon Pond
|
Tatebayashi City
|
150
|
30
|
80.0
|
Tajimi Junior High School
|
Tajimi City
|
-
|
-
|
-
|
|
|
|
|
|
