Horikawa Sen-nin Chosatai 2010
(Horikawa River Thousand-Citizen Survey Network 2010)

Summary Meeting for the 9thStage(April 1st～June 30th 2011）

Horikawa Sen-nin Chosatai 2010 Secretariat
Sep. 10th 20111

Horikawa River Pilot Project～Tｒａｎｓｍｉｓｓｉｏｎ of raw water from Kiso River (TRWKR) ～1.Purpose:To inspect the clarification effects by TRWKR with citizen's.
(1)Develop a new clarifying policy(2)Catch effects on ecosystem(3)Sustain and enhance citizens activity(4)Progress of citizens awareness

2. Water source and Volume of transmission of raw water(1)Water source
Kiso River : Kiso River system (first grade river)(2)Volume of transmission of raw water
Maximum 0.4 m3/s

3. Pilot project period(1)Evaluation and Survey term: about 5years（From Apr .2007 to Mar.2012）(including term of account ,survey after stopping TRWKR)(2)TRWKR period : about 3years（From Apr.22nd 2007 to Mar.22nd 2010）

Horikawa Sen-nin Chosatai (HSC)2010■The formation of Horikawa Sen-nin Chosatai (HSC) （April 22nd, 2007）
With a viewpoint and a sense of citizens, the survey of clarification effect by TWRKR started.
The survey with a viewpoint and a sense of citizens
・clearness ・transparency ・color ・bubble ・smell ・garbage ・living things etc.

■Fixed Point Observation Groups
We are surveying the effect of pilot project about Horikawa River clarification．

■Free Survey Groups
We are making studies of Horikawa River ｉn any themes！

■Horikawa Cheering Groups
We are supporting for Horikawa River clarification !

★Confirm★Confirm thethe effecteffect ofof clarification
clarification★Sustain★Sustain andand enhanceenhance citizens
citizens activity
activity★Progress★Progress ofof citizens
citizens awarenessawarenessNumber of Participants of Horikawa
Sen-nin Chosatai 2010
Horikawa Sen-nin Chosatai started accepting participation on March 26th ,2007

Apr. 22nd 2007

Sep. 6th 2011

Fixed Point Observation
Groups55Groups,
497Citizen

90Groups,
900Citizens

Free Survey Groups

22Groups,
234Citizen

38Groups,
639Citizens

Horikawa CheeringGroups88Groups,
1,531Citizen

2137Groups,
15,323citizens

Total

165Groups,
2,262Citizen

2265Groups,
16,862Citizens

Survey Period and the Number of Reports
Survey Period

Number

1st stage Spring - Early summer /April 22nd to June 30th 2007
258
July 1st to September 7th 2007134
2nd stage Autumn - Early winter /September 8th to December 16th 2007
383
December 17th 2007 to March 31st 008
103
3rd stage Spring - Early summer /April 1st to June 30th 2008
245
July 1st to September 27th 200864
4th stage Autumn - Early winter /September 28th to December 16th 2008 152
December 17th 2008 to March 31st 2009100
5th stage Spring - Early summer /April 1st to June 30th 2009
145
July 1st to September 26th 200954
6th stage Autumn - Early winter /September 27th to December 16th 2009 120
December 17th 2009 to March 31st 201081
7th stage Spring - Early summer /April 1st to June 30th 2010
111
July 1st to September 11th 201044
8th stage Autumn - Early winter /September 12th to December 17th 2010 104
December 18th 2010 to March 31st 201172
9th stage Spring - Early summer /April 1st to June 30th 2011
112
Total
2282

Motoiri Sliceway

Shonai irigation weir

Yada River
Sanage Bridge
Kitashimizu Bridge
Jouhoku Bridge

DaikoRiver
Trunk Line

Raw water transmission
Meijo Water route for Pilot project
Treatment Center
Nagoya Castle
Nabeyaueno Water
Purification plant
Asahi Bridge

Nakagawa Canal

Matsushige Bridge

JR・Meitetsu line

Oto Bridge
Oseko Bridge

Shin-horikawa River

Naya Bridge
Shinsuzaki Bridge

Matsushige Lock Gate

JR Tokaido shinkansen

Nagoya Port

Existing aqueduct

Shonai River

Nagoya Station■TRWKR：
0.4m3/s■TRWKR period :From Apr.22nd 2007 to
Mar.22nd 2010

InuyamaNarutoProvisional raw water Transmission from Shonai River

Horikawa River

Transmission of
Raw Waterfrom Kiso River（TRWKR）

Kiso River

Kizaemon Bridge
Koshin Bridge
Horikawa Tide Gate

Transmission of Raw Water from Kiso River(TRWKR)The View around the Inuyama Intake of Kiso River
Sanage Bridge

Daikou river trunk line

Injection point：
The downstream section below Sanage bridge on Horikawa RiverResults of TRWKR
Period：April 22nd 2007～March 22nd 2010
Survey Period
1st Stage
April 22nd 2007～June 30th 2007

Interval

2nd Stage
September 8th 2007～December 16th 2007

Interval

3rd Stage
April 1st 2008～June 30th 2008

Interval

4th Stage
September 28th 2008～December 16th 2008

Interval

5th Stage
April 1st 2009～June 30th 2009

Interval

6th Stage
September 27th 2009～December 16th 2009

Interval（Until the stop of TRWKR）
December 17th 2009～March 22nd 2010

Total

Days of
PeriodDays of TRWKR

70

52(74%)

69

41

100

84(84%)

106

86

91

81(89%)

89

39

80

50(63%)

105

93

91

82(90%)

88

63

81

60(74%)

96

92

1,066

823(77%)(％：Days of Period/
Days of TRWKR×100)

Note) Days which a little raw water was transmitted are also counted in “Days of TRWKR”

Experiment of increasing flow of
raw water from Shonai River (extra experiment)
1.Water source and Volume of transmission of raw water(1)Water source
Shonai River : Shonai River system (1st grade river)(2)Volume of transmission of raw water
maximum 0.7 m3/s (Increasing flow volume 0.4 m3/s)

2.the term of increasing flow(1)the term of experiment : Oct. 1st to Dec 31st 2010(2)the term of increasing flow : Oct. 5th to Nov. 2nd 2010

The 9th Stage■ We investigated the water quality of Horikawa River without TRWKR
in Spring and early Summer.
Jun. 30th to Apr. 1st 2011

Increase of transmission of raw water from Shonai River■ Transmission of raw water from Shoai River :0.3m3/s→0.7m3/s （＋0.4m3/s )■ The term of increasing flow : Oct. 5th to Nov. 2nd 2010

ResultOctober

The number of days of
increasing flow of raw water†
27 daysNovember

2 daysTotal

29 daysMonth†) Days are counted when the increase of transmission was measured.

No Increase Case

Increase CaseSummary of survey (after TRWKR to the 9th stage)
It was confirmed that•••

The water quality tends to be improved during TRWKR (1st to 6thstage).
The water quality tends to be deteriorated after the stop of TRWKR(7th to 9th stage) in some spans.
The TRWKR effected to clarify of water quality.

The main measures of social experiment
Measures

2007

2008

2009

2010

2011

1st.

3st.

5st.

7st.

9st.

2st.
TRWKR (0.4m 3/s)
Increase of raw water transmission
from the Shonai River(＋0.4m 3/s)
Introduction of advanced water
treatment for the Meijo water
treatment center
Launch of the Horikawa Ugan Rainwater Reservoir for pollution controll

4st.

6st.

8st.

Summary of survey (after TRWKR to the 9th stage)
Launch of the advanced water treatmentof the Meijo water treatment centerMay 2010

Launch of Horikawa Ugan Rain-water
Reservoir for pollution control
Sep. 2010

⑤

⑥

④

③

②

Improvement of
combined sewer system①

凡例
対策済み区域
建設中の区域Results of the 9th stage
•
•
•
•
•
•

It was confirmed that the impression of water deteriorated
compared to the term of the TRWKR.
The number of span the impression of water deteriorated after
the TRWKR was less than the 7th stage.
Distinct deterioration on transparency, COD, babble, smell wasn’t
confirmed.
The advanced water treatment of the Meijo water treatment
center has launched since 2010.
The Horikawa Ugan Rain-water Reservoir for pollution control
has launched since 2010.
The quality of raw water transmitted from the Syonai River has
improved.

※Based on above measures, the deterioration of Horikawa
River water may not be clear.

Summary of survey
Item
1st - 6th stage

Koshin Bridge～Oseko Bridge

Oseko Bridge～
Matsushige Bridge Asahi Bridge
Matsushige Bridge ～Asahi Bridge～Johoku Bridge

Johoku Bridge～Sanage Bridge

column

-

○

○

○

●

-

●

May .2010 inservice
Meijo Water
Treatment
Center ・advancedwater
treatment

Impression of Comparison of 7th stage with TRWKR period (spring ～ early summer)
clearness
Comparison of 8th stage with TRWKR period (autumn ～ early winter)

-

●

-

Comparison of 9th stage with TRWKR period (spring ～ early summer)

-

●

-

1st - 6th stage

-

○

-

○

Comparison of 7th stage with TRWKR period (spring ～ early summer)

-

●

-

●

Comparison of 8th stage with TRWKR period (autumn ～ early winter)

-

●

-

●

Comparison of 9th stage with TRWKR period (spring ～ early summer)-

1st - 6th stage-

Comparison of 7th stage with TRWKR period (spring ～ early summer)-

Comparison of 8th stage with TRWKR period (autumn ～ early winter)-

Comparison of 9th stage with TRWKR period (spring ～ early summer)-

1st - 6th stage-

Comparison of 7th stage with TRWKR period (spring ～ early summer)-

Comparison of 8th stage with TRWKR period (autumn ～ early winter)-

Comparison of 9th stage with TRWKR period (spring ～ early summer)--

1st - 6th stage

-

○

○

Comparison of 7th stage with TRWKR period (spring ～ early summer)

-

●

-

●

Comparison of 8th stage with TRWKR period (autumn ～ early winter)

-

●

-

Comparison of 9th stage with TRWKR period (spring ～ early summer)-

Transparency

ＣＯＤ

Bubble

Smell

●

●

○
●

○

○

-

●

-

●

Sep..2010 inservice
Horikawa Ugan
Rain-water
Resevoir forpollution
controll

○
●
●

○
-

●

-

●

-

Note）・1st – 6th stage ： TRWKR ・7th – 9th stage ： No TRWKR○：improvement areas during TRWKR ●：worse than the data during TRWKR －：note compared because the number of data is small(less than 9)

・It was confirmed that the water quality tends to be improved during TRWKR between Sanage Bridge andMatsushige Bridge.
・It was confirmed that the water quality tends to be deteriorated after the stop of TRWKR between Sanage Bridge
and Johoku Bridge, and between Asahi Bridge and Matsushige Bridge.
→In this result, TRWKR was considered to have made good effects between Sanage Bridge and Matsushige Bridge.

Impression of Clearness

・1st – 6th stage ： TRWKR
・7th – 9th stage ： No TRWKR
・No Rain on the day and the previous day

The ratio of “comfortable ","a little comfortable" and "neither ". **34

20

Improved during TRWKR 73
62

61
56

57

56

50 50
45
39
27

3836
28

25
23 21

18

23

16Increase
11

12

0 0 0
Koshin Bridge ～Oseko Bridge

Numbers of Data

87 87

3 2 5

2 2 1 0 0 0

Not enough data

50

Oseko Bridge ～Matsushige Bridge

Matsushige Bridge ～Asahi Bridge

15 35 33 9 29 25 30 21 25

46 103 82 28 37 16 25 25 22

57

53
43

Increase 36

40

29

20

Increase

6

0

93

12

16

60
50
39

8
0
Asahi Bridge ～Johoku Bridge
12 21 14 2 13 4 659Johoku Bridge ～Sanage Bridge
37 47 42 11 30 17 24 16 20

Not enough data

Sanage Bridge ～Sakae Bridge
31 41 15 2

8

5

3 8

5

Not enough data

■How did the impression of clearness (“from spring to early summer”) change during TRWKR ?
→ The ratio of "comfortable", "a little comfortable“ and "neither" increased with TRWKR.
It was confirmed that the ratio of “comfortable ","a little comfortable" and "neither " tends to increase during
TRWKR between Sanage Bridge and Matsushige Bridge.
** "comfortable", "a little comfortable" and "neither " are categorized as the acceptable range for citizens

Transmission of raw water from Shonai River40

40

100 100100

Injection Point of TRWKR

50 5050

2nd stage Sep. 8～Dec.16 2007
4th stage Sep.28～Dec.16 2008
6th stage Sep.27～Dec.16 2009
8th stage Sep.11～Dec.17 2010

Meijo Water
Treatment Center

60

Shin-Horikawa River confluence80

25 investigation of 31 were executed on June 27 at Kizune Bridge.

1st stage Apr.22～Jun.30 2007
3rd stage Apr. 1～Jun.30 2008
5th stage Apr. 1～Jun.30 2009
7th stage Apr. 1～Jun.30 2010
9th stage Apr. 1～Jun.30 2011

100

100

Nagoya Port

Impression of clearness (%)*)% ; "comfortable “+"a little comfortable “+"neither ".

Impression of Clearness
The ratio of "comfortable", "a little comfortable" and "neither".**・1st – 6th stage ： TRWKR
・7th – 9th stage ： No TRWKR
・No Rain on the day and the previous day

Comparison of TRWKR period and after stop of TRWKR*)% ; "comfortable “+"a little comfortable ”+"neither ".

80

Improved during TRWKR

Average of 1st・3rd・5th stage=Average during TRWKR at thesame season as 7th・9th

60

20

No date(=The ratio of “comfortable”,“ a little comfortable” and “neither” was low ）13% decrease
19

16

12
6

5

0

0
Koshin Brigde～Oseko
BridgeNumbers of Data

22

18

10

0
0
Not enough data

Oseko Bridge～
Matsushige Bridge

77

30

25

Meijo Water
Treatment Center

41

40

Shin-Horikawa River
confluence

Bad impression between Johoku Bridge and Matushige Bridge

25

29

0

Matsushige Bridge～ Asahi Bridge～Johoku
Asahi Bridge
Bridge

165

40

37

22

39

9
6
Not enough data

Johoku Bridge～
Sanage Bridge

109 2420■How did the impression of clearness (“from spring to early summer") change after the stop of TRWKR ?
・The ratio of “comfortable”,“ a little comfortable” and “neither” was reduced between Matsushige Bridge and Asahi Bridge.
→ In this result, it was confirmed that the impression of clearness was improved during TRWKR.
・The ratio of “comfortable”,“ a little comfortable” and “neither” between Matsushige Bridge and Johoku Bridge was low.
→ It is considered that the impression of clearness between Matsushige Bridge and Johoku Bridge is not good.
** “comfortable”,“ a little comfortable” and “neither” are categorized as the acceptable range for citizens

Injection Point of TRWKR

The average of 1st・3rd・5th stage: with TRWKR
7th satge：after the stop of TRWKR
9th stage: after the stop of TRWKR

Nagoya Port

Impression of clearness（％）

100

Impression of Clearness (from Sanage Bridge to Koshin Bridge)
Criterion for Judgment of "comfortable ","a little comfortable ","neither ".
Rate of criterion for judgment ofimpression（ ％ ）water color

smelltransparency

TRWKR period
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%

1%

15%

2%

garbage

3%

2%
11%

bubbleliving things

4%3%others
7%

22%

19%

45%

45%

11%

10%

22%

26%

6th
stage

7th
stage

8th
stage

9th
stage

bubbleliving thingsothers21%

・1st stage : No data
・2nd - 6th stage：TRWKR
・7th - 9th stage：No TRWKR
・No rain on the day and the previous day

26%
48%

50%

45%
60%

55%
2%
2%

No data

20%

1st
stage

2nd
stage

■The reply of “Transparency” was
40 ～ 60 %

7%

62%
3%

40%

48%

21%

36%

6%
3rd
stage

4th
stage

5th
stage

Criterion for Judgment of "a little Dirty", "Dirty"

Rate of criterion for judgment ofimpression （ ％ ）water color
100%

smell

TRWKR period
1%
5%

1%
5%

22%

19%

90%
80%
70%

garbage
1%

24%

13%

4%

17%
14%

19%

4%
11%

63%

57%

68%

18%
10%

69%
56%

20%
0%

36%
6%

40%

10%

18%

13%

3%

56%

8%

13%

50%
30%

2%

3%

8%
10%

8%

13%

60%

transparency

50%

52%

8th
stage

9th
stage

No data
1st
stage

2nd
stage

3rd
stage

4th
stage

5th
stage

6th
stage

7th
stage

■The reply of “Water color" wasover 50%.

Impression of Clearness (from Sanage Bridge to Koshin Bridge)
2nd - 9th stage containing the extended period with TRWKR / no TRWKR
Koshin Brigde

Matsushige Bridge

Oseko Bridge

Asahi Bridge

Johoku Bridge

Sanage Bridge

Meijo Water Treatment Center

Injection Point of TRWKR

Shin-Horikawa River confluenceothersliving things
bubblegarbagetransparency
smellwater color

Rate of criterion for judgment of impression (%)“Smell” increased,“Water color” decreased
Koshin Bridge ～Oseko Bridge
100%

100%
90%

13%

13%

90%

1%

17%

2%
17%

80%

80%

70%

70%
60%

Oseko Bridge ～Matsushige Bridge

51%

60%

87%

40%

19%

22%
Increase

7%
17%

30%

20%

10%

10%

42%

Decrease

①

②

1%
18%

1%

①

②

Asahi Bridge ～Johoku Bridge

2% 1%

100%

15%

90%
80%

70%

18%

60%

6%

50%

17%

12%

Increase
55%

53%

70%

6%
21%

100%

1%

9%

Increase
27%

50%
40%

40%
30%

10%

68%

64%

Decrease

20%

0%

①

②

Increase
40%

58%

3%

30%

10%

0%

13%

14%

80%

50%

10%

②

90%

70%

4%

1%

5%

60%

20%

①

Johoku Bridge ～Sanage Bridge

60%

20%

0%

0%

0%

90%

30%

56%

20%

33%

100%

40%

40%

3%
30%

Matsushige Bridge ～Asahi Bridge

80%

50%

50%

“Transparency” increased,“Water color” decreased

3%
36%
26%

Decrease①②①; No Rain on the day and the previous day ②; No Rain on the day and Rain on the previous day■ In case of rain on the previous day, how impression of clearness has changed?
→Between Sanage Bridge and Asahi Bridge, the evaluation of “Transparency” increased and “Water color” decreased.
→Between Asahi Bridge and Oseko Bridge, “Smell” increased and “Water color” decreased.

Transparency average value in each section

95
89

Shin-Horikawa River confluence

87

68
60
50
40

20

0

Nagoya Port

transparency(cm)

80

83

84

83

90 92

87
80

79
74

59

61
56 54

56

57

65
60

53

52

Increase 71
65

59

45

Increase

79

77

68

80

63

64

61
52

88

58
50
43

58

51

Meijo Water
Treatment Center93

3rd stage Apr. 1～Jun.30 2008
6th stage Sep.27～Dec.16 2009
9th stage Apr. 1～Jun.30 2011

57

59

62
55

55

42

0 0 0
Koshin Bridge～
Oseko Bridge

Oseko Bridge～
Matsushige Bridge

Matsushige Bridge～
Asahi Bridge

Asahi Bridge～
Johoku Bridge

Johoku Bridge～
Sanage Bridge

Sanage Bridge～
Sakae BridgeNote） Over 100cm values were regarded as 100cm.

Transparency improved during TRWKR

Transparency improved during TRWKR■ How did transparency of water (spring～early summer) change during TRWKR period?
→ Transparency level was improved between Sanage Bridge and Johoku Bridge , and between Asahi
Bridge and Matsushige Bridge.

Transmission of raw water from Shonai River

100 100

100

2nd stage Sep. 8～Dec.16 2007
5th stage Apr. 1～Jun.30 2009
8th stage Sep.11～Dec.17 2010

Injection Point of TRWKR

1st stage Apr.22～Jun.30 2007
4th stage Sep.28～Dec.16 2008
7th stage Apr. 1～Jun.30 2010

・1st - 6th stage：TRWKR
・7th - 9th stage：No TRWKR・ No rain on the day and the previous day

・ 1st, 3rd, 5th stage：TRWKR
・ 7th and 9th stage：No TRWKR・ No rain on the day and the previous day

Change in Transparency - average of each section

Comparison between the transparency during TRWKR （the average of 1st, 3rd, 5th stage）
and the transparency after the stop of TRWKR（ the average of 7th, 9th stage）

80
68

0

No data

Minatoshin Bridge～ Oseko Bridge
Number of data

10

0

0

56

56

57

58

57
52

51
43

Not enoughdata

Oseko Bridge～
Matsushige Bridge
73

30

24

Matsushige Bridge～
Asahi Bridge
106

22

20

Asahi Bridge～
Johoku Bridge
29

6

8

64
58

Meijo Water
Treatment Center

Shinhorikawa River

Not enough data

Nagoya Port

20

66

65

60

40

9th stage: After the stop of TRWKR

・There was no conspicuous change in the 9ｔｈ stage.
・The transparency was low between Johoku Bridge and Oseko Bridge.
・The transparency in all the downstream sections below Sanage Bridge waslower than 70cm (citizens' acceptable transparency).

100

Transparency(cm)

7th stage: After the stop of TRWKR

Injection Point of TRWKR

The average of 1st, 3rd, 5th stage ：During TRWKR

Johoku Bridge～
Sanage Bridge
71

20

20

■ How did the transparency (spring ～ early summer) change after the stop of TRWKR?
→There was a little change after the stop of TRWKR. But, there was no conspicuous change in the 9th stage.
The transparency between Johoku Bridge and Oseko Bridge was low. The transparency in the downstream section below
Sanage Bridge was lower (worse) than 70cm (citizens' acceptable transparency :Impression of water clearness:“Comfortable～Neither”).

Correlation between “impression of clearness”
and the average of “transparency”.
・ During 2nd～9th stage (including data of out-of stage period).
・ No rain on the day・ All section including upstream section

Transparency
70cm or more

The citizens’ acceptable range

Impression of clearness(evaluated by citizens in terms of water transparency)
Transparency of “70 cm or more” is one of the targets for
improvement of “impression of water clearness”.

The average of transparency when it rained on the previous day.
Sanage Bridge～Minatoshin Bridge
・1nd～9th stage (including data of out-of stage period)
・No rain on the day

No rain on the previous day

The transparency after it rained on the previous day was lower
than the transparency after it didn’t rain on the previous day.
81
71

60
50
40
30
20
10

69

Shinhorikawa River

70

Nagoya port

Transparency（cm）

80

Injection Point of TRWKR

Especially, the transparency became lower
between Johoku Bridge and Matsusige Bridge.

90

71

68
56

54
48

48

62

Meijo Water
Treatment Center

100

Rain on the previous day

0
Oseko bridge～ Matsushige Bridge～
Minatoshin Bridge～ Oseko Bridge Matsushige Bridge
Asahi Bridge

Number of data

35

10

398

74

407

77

Asahi Bridge～
Johoku Bridge
111

Johoku Bridge～
Sanage Bridge

11■ How did the transparency change after it rained on the previous day?
→The transparency after it rained on the previous day was lower than the transparency
after it didn’t rain on the previous day.
Especially, the transparency became lower between Johoku Bridge and Matsusige Bridge.

278

45

Change in COD the average value in each section

・ 1st - 6th stage：TRWKR
・ 7th - 9th stage：No TRWKR・ No rain on the day and the previous day

20
18

2nd.stage Sep.8～Dec.16 2007
5th.stage Apr.1～Jun.30 2009
8th.stage Sep.11～Dec.17 20101615
decrease

13 13
12
11
11 11
10 10

8

9

6

6

4 4

Not enough data

20decrease13

decrease913

12 1212
11

11
10

10

9
7

14

9

9

9

9 9

9

8 8

8
7

Meijo Water
Treatment Center

9

Shinhorikawa River

10

Nagoya Port

COD(mg/L)

13

12

4

15

15

14
14

3rd.stage Apr.1～Jun.30 2008
6th.stage Sep.27～Dec.16 2009
9th.stage Apr.1～Jun.30 201116

6

Injection Point of TRWKR

1st.stage Apr.22～Jun.30 2007
4th.stage Sep.28～Dec.16 2008
7th.stage Apr.1～Jun.30 2010

11

10

9

99 9
8
7

Not enough data

No data

0 00

Koshin Bridge～
Oseko Bridge

Oseko Bridge～
Matsushige Bridge

Matsushige Bridge～
Asahi Bridge

Asahi Bridge～
Johoku Bridge

Johoku Bidge～
Sanage Bridge

Sanage Bidge～
Sakae Bridge

COD improved during TRWKR
Note) The value of 20mg/l or more was treated as 20mg/l■ How did COD （spring～early summer) change during TRWKR period？
→ As for COD between Sanage Bridge and Matsushige Bridge, the tendency of
decrease (improvement) was found during TRWKR.

Change in COD the average value in each section

・ 1st, 3rd, 5th stage：TRWKR
・ 7th and 9th stage：No TRWKR・ No rain on the day and the previous day

Comparison between average COD of 1st, 3rd, 5th stage(TRWKR period)
and average COD of 7th and 9th stage (after the stop of TRWKR)
20
18
16

14
12

13

13

12

7

8

Not enough data420
Numbersof Data

Nagoya Port

6

Shinhorikawa River

10

9

8

12

9

11 11
9

Not enough
data

11

Meijo Water
Treatment Center

14
COD(mg/L)

7th Stage : after the stop of TRWKR

Injection Point of TRWKR

the average of 1st, 3rd, and 5th stage : with TRWKR
9th Stage : after the stop of TRWKR

No data

Minatoshin Bridge～
Oseko Bridge
10

0

0

Oseko Bridge～
Matsushige Bridge
74

30

24

Matsushige Bridge～
Asahi Bridge
110 22 22

Asahi Bridge～
Johoku Bridge
38

6

9

Johoku Bidge～
Sanage Bridge
102 2020■ How did COD(spring～early summer) change after the stop of TRWKR？
→・Although there was some change after the stop ot TRWKR, a remarkable change
was not found in the 9th stage.
・COD between Johoku Bridge and Matsushige Bridge was slightly high.
Note) The value of 20mg/l or more was treated as 20mg/l

The average of ＣＯＤ when it rained on the previous day.
Sanage Bridge～Minatoshin Bridge
・ During 1st～9th stage (including data of out-of stage period).
・ No rain on the day

No rain on the previous day

Rain on the previous day

20
18

Injection Point of TRWKR

After it rained on the previous day,
COD improved between Sanage Bridge and Asahi Birdge.

14

13

4
2
0
Numbersof Data

6
5

11
10
8

8

Minatoshin Bridge～ Oseko Bridge～ Matsushige Bridge～
Oseko Bridge
Matsushige Bridge
Asahi Bridge
36

10

Meijo Water
Treatment Center

8

Shinhorikawa River

10

6

13
12

12

Nagoya Port

ＣＯＤ(mg/L）

16

406

74

425

88

Asahi Bridge～
Johoku Bridge
127

15

9

Johoku Bidge～
Sanage Bridge
333■ How did COD change when it rained on the previous day？
→After it rained on the previous day, COD between Sanage Bridge and Asahi Bridge improved.

53

The occurrence of bubbles

・ 1st, 3rd, 5th stage：TRWKR
・ 7th and 9th stage：No TRWKR・ No rain on the day and the previous day(Sanage Bridge～Minatoshin Brigde・each area)
Bubbles were not seen
Bubbles flowed from the downstream
Bubbles flowed from the upstream
Bubbles floated from the bottom of the river

T he occurrence of bubbles_C ons titution R atio(% )

80%

49

the fre60%
40%

85 of theoccurre 89
nce of
bu

30

24

20%

74

The num berof D a ta

bbles dT he occurrence of bubbles_C ons titution ratio(% )

13

5

13

20

32

3rd stage

4th stage

5th stage

6th stage

7th stage

8th stage

9th stage

42

9

27

17

24

16

20

1st stage

2nd stage

33

47

Not enough data

80%

95

100

100

100

40%
50

20%
0%

8
8

5

T he num ber 1st stage
12of D a ta

13
13

2nd stage

3rd stage

4th stage

5th stage

6th stage

7th stage

21

14

2

12

3

5

100%
80%

Decr40easing th
e

60%

2

69

42
frequenc
y of
1
1

55
the 70occurrence

4
4

20%

5

Not enough dataof bubbles

8

58
87

100
4

30

42

38
13

0%
The num ber 1st stageof D a ta
45

9th stage

58

56

23

8th stage

42

3

40%
58

89

100

75

83

100

100

11

7
7

T he num ber 1st stageof D a ta
15

3
3

13

4

3

2nd stage

3rd stage

34

30

2nd stage

3rd stage

4th stage

5th stage

6th stage

7th stage

8th stage

9th stage

104

81

27

31

15

24

23

19

The ratio of “Bubbles from the bottom of the river”
is larger than other areas.

4
13

14

7

4th stage

5th stage

6th stage

7th stage

9

9

24

28

Not enough data

8th stage

9th stage

19

23

Bubbles were not seen
Bubbles flowed from the downstream
Bubbles flowed from the upstream
Bubbles floated from the bottom of the river

Period of TRWKR

80%
60%

67
100

100

100

100

100

3rd stage

4th stage

5th stage

6th stage

7th stage

8th stage

9th stage

5

2

2

1

0

0

0

No data

40%
20%

33

0%
The num berof D a ta

1st stage

3

2nd stage2

Not enough data

Bubbles were not seen
Bubbles flowed from the downstream
Bubbles flowed from the upstream
Bubbles floated from the bottom of the riverA s ahi B ridg e～Mats us hig e B ridg e
Period of TRWKR

T he occurrence of bubbles_C ons titution ratio(% )

20

8

20%

100%

74

80

92

84

94

O s eko B ridg e～Minatos hin B ridg e

50
84

86

0%

Bubbles were not seen
Bubbles flowed from the downstream
Bubbles flowed from the upstream
Bubbles floated from the bottom of the river

Period of TRWKR

60%
40%

12

6
6
6

J ohoku B ridg e～A s ahi B ridg e60%

ecreas
ed

75

11

19

100%

74

11

9
6

0%

80%

82

15
21

100%

56

57

quencyPeriod of TRWKR
T he occurrence of bubbles_C ons titution ratio(% )Period of TRWKR
100%

Bubbles were not seen
Bubbles flowed from the downstream
Bubbles flowed from the upstream
Bubbles floated from the bottom of the river

Mats us hig e B ridg e～O s eko B ridg e

T he occurrence of bubbles_C ons titution ratio(% )S anag e B ridg e～J ohoku B ridg e■ How did the bubbles during theperiod of TRWKR （Spring～Earlysummer) change?
→The frequency of occurrence of bubbles
decreased in the area between Sanage
Bridge and Johoku Bridge, Asahi Bridge
and Matsushige Bridge during the period of
TRWKR.

・ 1st, 3rd, 5th stage：TRWKR
・ 7th and 9th stage：No TRWKR・ No rain on the day and the previous day

The occurrence of bubbles
Comparison during the period of TRWKR and after the period of TRWKR(1st/3rd/5th Stage and 7th/9th Stage)
Minatoshin Bridge Oseko Bridge
Matsushige Bridge
Asahi Bridge

Matsushige Bridge～Asahi Bridge

Bubbles were not seen
Bubbles flowed from the downstream
Bubbles flowed from the upstream
Bubbles floated from the bottom of the river

Bubbles were not seen
Bubbles flowed from the downstream
Bubbles flowed from the upstream
Bubbles floated from the bottom of the river

100%
90%
80%
70%
60%

90
50%
40%
30%
20%

No data10%

100%

N um ber ofD ata

1st/3rd/5th 7th Stage
Stage
0

0
10
Not enough data

9th Stage

0

T he oc c urrenc e of bubbles _C ons titution ra tio(%

T he oc c urrenc e of bubbles _C ons titution ra tio(% )Bubbles flowed from the upstream
Bubbles floated from the bottom of the river

100%
90%
80%
70%
60%

75
86

83

50%
40%
30%
20%

11

10%

1
10

0%

3

14

1st/3rd/5th 7th StageN um ber ofStage
D a ta

72

28

4
13

100%
90%
80%

24

58

70%
60%

1
2

50%

4

40%
30%

58

53

20%

38

The rate of“Bubbles
10%
floated from the bottom
0% of the river“ is high.

9th Stage
N um ber of
D ata

The rate of “Bubbles floated from the bottom of
the river” increases, after the period of TRWKR.

42

44

1st/3rd/5th 7th Stage
Stage

100%

80%
70%

80

60%
50%

74

92

40%
30%
20%
10%
0%

N um ber of
D ata

Bubbles were not seen
Bubbles flowed from the downstream
Bubbles flowed from the upstream
Bubbles floated from the bottom of the river

100%

90%

9th Stage

19
24
157
There is no significant change,,
after the period of TRWKR.

■ How did the bubbles during the period of TRWKR （Spring～Earlysummer) change?
→ There was no area where frequency of the occurrence of the bubble
導水期間中に改善の傾向
th Stage).
increased notably.,after the period of TRWKR(9The frequency of the occurrence of bubbles between Sanage Bridge
and Johoku Bridge decreased. And, the frequency of the occurrence of
bubbles between Asahi Bridge and Ohseko Bridge didn’t change
significantly.

Bubbles were not seen
Bubbles flowed from the downstream
Bubbles flowed from the upstream
Bubbles floated from the bottom of the river

T he oc c urrenc e of bubbles _C ons titution ra tio(%

Bubbles flowed from the downstream

TRWKR

Johoku Bridge～Sanage Bridge

Asahi Bridge～Johoku Bridge

T he oc c urrenc e of bubbles _C ons titution ra tio(% )Oseko Bridge～Matsushige Bridge

Bubbles were not seen

T he oc c urrenc e of bubbles _C ons titution ra tio(%

Koshin Bridge～Oseko Bridge

Meijo Water
Treatment CenterIn the 9th stage, there was no area where frequencyof the occurrence of the bubble increased notably.

Junction of Shin‐horikawa River

Sanage Bridge

Johoku Bridge

13
3
5

20

1st/3rd/5th 7th Stage
Stage

38

13
9th Stage

5
8
Not enough data

90%
80%
70%

58

56
75

60%
50%
40%
30%

12
24
5

20%
10%

32
20

18

0%

N um ber ofD a ta1st/3rd/5th 7th Stage
Stage

102

25

9th Stage

20

After the period of TRWKR,
the occurrence of bubbles decreased,
especially “bubbles flowed from the
upstream” decreased.

■ How about the occurrence of bubbles （Spring～Early summer)?
→ The rate of “bubbles floated from the bottom of the river”
between Asahi Bridge and Matsushige Bridge is higher than otherareas.

The occurrence of smell

・ 1st - 6th stage：TRWKR
・ 7th - 9th stage：No TRWKR・ No rain on the day and the previous day

100%
80%
60%
40%
20%

The occurrence of s ma ll_C ons titution ra tio(% )

53

68

12

30
10

2

5

17

6

8

4th Stage

5th Stage

6th Stage

7th Stage

8th Stage

9th Stage

42

11

30

17

24

16

20

Smell

A little smell

Bad smell

Rather bad smell

20

25

38
The ra 42
50
57
te of “an25d “sbmell” ad smell” ,decre“rathease.
r bad 46
smell”
43
33
5
5
5

0%
12

43

11

1st Stage
N um ber of D a ta

46

20

20

22

20

20

7th Stage

8th Stage

9th Stage

5

9

A little smell

Not smell

40

36

21

14

2

13

4

Not enough data
Rather bad smell

8

5

49

11

Not enough data

Smell

12

33
50

33

25
6th Stage

35

20

8
8
5th Stage

42
15
13

20

4th Stage

37

40%

75

3rd Stage

Bad smell
Period of TRWKR

24

20

50

As ahi B ridge～Mats us hige B ridge

75

44

30
Y
12

13
6 4

14
11

2nd Stage

3rd Stage

107

2

46

Not smell

33

40

2nd Stage

100%
80%

4

19
6

20
5
5

3rd Stage

17

0%

29

47

20%

20%

42

10

Period of TRWKR

1st Stage
N um ber of D a ta

70

2nd Stage

100%

60%

Not smell

75

99J ohoku B ridge～As ahi B ridge

40%

A little smell

65

82

The rate of “bad smell” , “r24 d “smather bad sm
anell” decrea38se
37 ell”
.
15

60%

Smell

29

0%

80%

Rather bad smell

47

49

1st Stage
Num ber of D a ta 33

The occurrence of s ma ll_C ons titution ra tio(% )Bad smell

Period of TRWKR

32
16

20

48
14
9
9

11

6
13
6

12

8

4th Stage

5th Stage

6th Stage

7th Stage

8th Stage

9th Stage

28

37

16

25

25

22

16
4

12
4

The occurrence of s ma ll_C ons titution ra tio(% )S anage B ridge～J ohoku B ridge

Mats us hige B ridge～O s eko B ridge

Bad smell

Rather bad smell

Smell

A little smell

Not smell

Period of TRWKR

100%

59

52

23

18

17

40%
15

29

20%

13
7

0%

3

11
11

21

2nd Stage

3rd Stage

4th Stage

5th Stage

35

33

9

29

3

O s eko B ridge～Minatos hin B ridge

Period of TRWKR

100%
80%

29

23

7

15
9

9

33
61

64

78

80

60%

31

43 A few data80%

1st Stage
N um ber of D a ta 15
The occurrence of s mall_C ons titution ra tio(% )The occurrence of s ma ll_C ons titution ratio(% )(Between Sanage Bridge ～ Minatoshin Bridge)

Bad smell

32

21

24

13
10

10

6th Stage

7th Stage

8th Stage

9th Stage

25

30

21

24

Rather bad smell

Smell

A little smell

Not smell

4

5

17

50
67

60%

100

100

100

100

No data

40%
50

20%

33

0%
1st Stage

2nd Stage

3rd Stage

4th Stage

5th Stage

6th Stage

7th Stage

8th Stage

9th Stage

3

2

5

2

2

1

0

0

0

N um ber of D a ta

Not enough data

■ How did the smell during the period of
TRWKR （Spring～Early summer) change?
→ The smell of “bad smell”,”rather bad
smell” and “smell” decreased in the area
between Sanage Bridge and Johoku
Bridge, Asahi Bridge and Matsushige
Bridge, during the period of TRWKR.

・ 1st, 3rd, 5th stage：TRWKR
・ 7th and 9th stage：No TRWKR・ No rain on the day and the previous day

The occurrence of smell

Comparison during the period of TRWKR and after the period of TRWKR(1st/3rd/5th Stage and 7th/9th Stage)
Minatoshin Bridge Oseko Bridge
Matsushige Bridge
Asahi Bridge

Bad smell
Smell
Not smell

Oseko Bridge～Matsushige Bridge
Bad smell
Smell
Not smell

Rather bad smell
A little smell

Bad smell
Smell
Not smell

90%

80%
70%
60%
90
50%
40%
30%

No data

20%
10%
10
0%

31

33

80%
53

70%
60%

23
29

50%
40%

17

23

30%

21

10
20%

8

10%

12

13
17

10

N um ber of D ata

10

Not enough data

0

9th Stage0

Asahi Bridge～Johoku Bridge
Bad smell
Smell
Not smell

1st/3rd/5th 7th StageStage
N um ber of D ata

77

30

90%

25
36

80%
70%
60%

44
36

50%

32

40%
30%

14

20

20%

14

12

14
9

10%

12

11

9

9th Stage
24

1st/3rd/5th 7th StageStage
N um ber of D ata 164

25

9th Stage
22

TRWKR

Johoku Bridge～Sanage Bridge

Rather bad smell
A little smell

Bad smell
Smell
Not smell

100%
12

0%

0%
1st/3rd/5th 7th StageStage

T he oc c urrenc e of s mall_C ons titution ratio(% )90%Rather bad smell
A little smell

100%

100%
T he oc c urrenc e of s mall_C ons titution ratio(% )T he oc c urrenc e of s mall_C ons titution ratio(% )100%Matsushige Bridge～Asahi Bridge

Rather bad smell
A little smell

T he oc c urrenc e of s mall_C ons titution ratio(% )Minatoshin Bridge～Oseko Bridge

Meijo Water
Treatment CenterIn the 9th stage, there was no area where the rate of“smell”,”rather bad smell” and “bad smell” increased notably.

Rather bad smell
A little smell

100%

90%

20

80%

34

41

70%

20

60%
50%

20

40%

33

38

30%

20
22

20%
13
10%

20
11

8
0%

T he oc c urrenc e of s mall_C ons titution ratio(% )Junction of Shin‐horikawa River

Sanage Bridge

Johoku Bridge

90%
29
80%
49
70%
70
60%
50%

42

40%
33
30%
20%
9

10%

9
0%

1st/3rd/5th 7th StageStage
N um ber of D ata

539

9th Stage
9

17

20

4
8

5
5

1st/3rd/5th 7th StageStage
N um ber of D ata

105

24

9th Stage
20

Not enough data

The rate of “bad smell“, “rather bad smell” and “smell” is high.

■ How did the smell during the period of TRWKR （Spring～Earlysummer) change?
→ There was no area where the rate of “smell”,”rather bad smell”
and “bad smell” increased notably, after the period of TRWKR(9thStage).

■ How about the smell （Spring～Earlysummer)?
→ The rate of “bad smell“, “rather bad
smell” and “smell” between Asahi
Bridge and Ohseko Bridge is high.

Suspended Substance (Artificial Garbage)
Change in the number of Suspended Substance■artificial garbage
Plastics (shopping bags, plastic bags, pot noodle vessels, foampolystyrene trays, pet bottles, etc.), cans, bottles, cigarette butts

the number of artificial garbage(number/one survey)

5
4
3

The total of each
artificial garbage per
stage

3.0

1st～6th stage：TRWKR
7th～9th stage：No TRWKRNo rain on the day and the previous day

all section
the number of surveys
1st stage：145
2nd stage：255
3rd stage：191
4th stage：54
5th stage：119
6th stage：66
7th stage：90
8th stage：75
9th stage：81

2.7
2.2
1.9

2

1st stage
3rd stage
5th stage
7th stage
9th stage

2nd stage
4th stage
6th stage
8th stage1
0.4
0.1 0.1

0

0
total

plastics

cansbottles

0.2

0.4

0.3

0

papersThe number of plastics is large

variety of artificial garbage
Note1)the number of artificial garbage per survey = the number of each artificial garbage/the number of surveys
Note2)the number of artificial garbage is the garbage found by survey.

■What is the garbage which floated in the water surface most?
→Plastics!

cigarettebuttsGarbage on the road
Change in the frequency that artificial garbage
on the road was found （2 stage～9 stage, all section）
th■artificial garbage
Plastics (shopping bags, plastic bags, pot noodle vessels, foampolystyrene trays, pet bottles, etc.), cans, bottles, cigarette butts“shopping bags 1.8” means that we
found shopping bags 1.8 times if wesurvey 10 times.

■How has the frequency of artificial garbage on the road changed?
→It decreased for the period of TRWKR. It might be caused by intensified cleaning campaign or changes
in social circumstance (the charge for shopping bags started etc.)
However, it increased after the stop of TRWKR (8th and 9th stages)→”Cigarette butts” was most frequent to be found on the road. It has continued on increasing trend.

cigarette butts

cigarette packages

other paper

magazines

newspaper

paper bags

paper cartons

glass bottles

cans

city-designated garbage
bags with garbage

shopping bags with garbage

pet bottles

other plastic products

pot noodle vessels

foam polystyren trays

The total of the frequency
that 18 kinds of garbage wasfound per stageother plastic bags

plastic bags

shopping bags

28 26.0
2nd stage・all sectiion
3rd stage・all sectiion
26
24
4th stage・all sectiion
5th stage・all sectiion
22
6th stage・all sectiion
7th stage・all sectiion
20
8thstage・allsectiion
9th stage・all section
18
16
・Almost all kinds of the garbage decreased for the period of TRWKR,
12.7
14
12
but increased for the period of no TRWKR.
10
8・Only cigarette butts have been increasing for all periods.
6
1.5
3.6 4.1
2.4
1.5
1.0
0.5
1.0
0.5
0.4
2.5
1.8
2.2
4
0.9
0.4
2.0 1.2
1.8 1.2
1.1
1.8
1.0
0.9
0.9
0.6
0.5
0.4
0.4
2
0.1 0.0
0.2
0.2
0.2
0.0
0.0
0.0
0
total

the frequency (artificial garbage on the road
/10 surveys)nd

1st～6th stage：TRWKR
7th～9th stage：No TRWKRNo rain on the day and the previous day

■ April 26, 2011
■ April 13, 2011
Young mullets (3cm in length) were seen
Young fishes, kind of a goby, were seenrunning up to upper stream at Nishiki Bridge.
running up at Nishiki Bridge.
It was seen one month earlier than last year.
In 2008 and 2009, it was seen on April（The first day of seeing young mullets running22, and in 2010, April 25. It was seen
up at Nishiki Bridge）
10 days earlier this year.
・May 9, 2007 ・March 22, 2008
・May 3, 2009 ・March 25, 2010
・April 26, 2011

■ April 30, 2011
Around 1:00 PM, dotted gizzard
shads(20cm in length) were wriggling
painfully on the water surface near
Hioki Bridge. It might be caused by lackof oxygen. We surveyed the upper andlower stream area, and found that it
occurred between Matsushige Lock
Gate and Iwai Bridge.

2010

35

new moon: spring tide

25

20

20

30

15

the age of the
moon
t
t

April 30, 2010
About 150 dotted gizzard shads
were dead on the water.

60
70

2010/5/1
year/month/day

May 21, 2010
About 1500 dotted gizzard shads
were dead on the water.

2011

35

0

new moon: spring tide

new moon: spring tide30
temperature(℃), the age of the moon(day)full moon: spring tide50
rainfall0
2010/4/1

photo by Kawasemi Survey Group40

full moon: spring tide

10
5

Newspaper article on May 2, 201110

the age of the
moon
t
t

25

May 2, 2011
About 1000 dotted gizzard shads
were dead on the water.

20
15

rainfallfull moon: spring tide

10
20
30

full moon: spring tide

40

10

50

5

60

0
2011/4/1

70
2011/5/1
year/month/day

rainfall(mm/day)temperature(℃), the age of the moon(day)30■ From late April to early May, a large
number of dotted gizzard shads weredead, The similarities between lastyear and this year are,①First mass death of fish of the year:
late Apr.-early May. ②Kind of fish：
dotted gizzard shad, ③temperature：around 15 ℃, ④tide：spring tide, ⑤
rain：after rain?, ⑥？？？・・・・

0
new moon: spring tide

rainfall(mm/day)

Aquatic lives in the 9th stage

■ April 15, 2011 Egg-laying of Carp
A lot of big carp, 70～80cm in length,
run up to the upper stream to lay eggs
into algae. It was spectacular that they
were pushing their way into a little algae,
splashing, and laying eggs.

■May 8, 2011
Encountering a snake■ Experience in nature
Kurokawa Dream Party President Mr. Umemoto (also the President of the executive
Committee of HSC）
We caught turtles, crayfish, Japanese mitten crabs, dragonfly naiads, goby minnow,
Palaemon adspersus and so on.

■June 9, 2011 a turtle laying eggs

Photo by Goyousui-ato-gaien-aigokai Survey GroupProgress of Citizen’s Awareness -Study Meetings-

Survey of fish & living things in the bottom of river
Report : Goyosuiato-gaien-Aigokai Survey GroupThe 8th meeting of HSC Report : secretariat
Strall around historical places near Horikawa River & Visiting Washingthe dye of Yuzen textile
Participant : Japan Secondlife Association
Report : Goyosuiato-gaien-Aigokai Survey Group

History walking & Cherry blossom viewing at Horikawa River andGoyosuiato-gaien
Participant : Retired people Group of Aichi Prefecture High School
Report : Goyosuiato-gaien-Aigokai Survey Group

Horikawa Culture Reaearch Group “With Horikawa”
Report : Goyosuiato-gaien-Aigokai Survey GroupProgress of Citizen’s Awareness -Study Meetings-

The 1st survey group special study meeting
Report ： Goyosuiato-Gaien-Aigokai Survey Group

Host : Ise Bay Basin Reclamation Network
Report : secretariat

Chunichi Newspaper
Morning, Feb.21st.2011

Study meeting for freshers of Environmental Pollution
Research and Analysis Center
Report ： Goyosuiato-Gaien-Aigokai Survey GroupProgress of Citizen’s Awareness -Study Meetings-

Nature Observating Event in Horikawa River
Participant : 2nd Grade of Osugi Elementary School
Report : Goyosuiato-Gaien-Aigokai-Survey Group

Experience & study in nature in Horikawa riverParticipant : 2nd Grade of Shimizu Elementary School
Report : Goyosuiato-Gaien-Aigokai-Survey Group

Experience & study in Horikawa “river living
things survey”
Participant : 2nd Grade of Tsuji Elementary School
Report : Goyosuiato-Gaien-Aigokai-Survey GroupProgress of Citizen’s Awareness -Study Meetings-

Experience & study in nature in Horikawa river living things survey
Participant : 2nd Grade of Iida Elementary School
Report : Goyosuiato-Gaien-Aigokai-Survey Group

Experience & observating event in nature in Horikawa
river living things survey
Participant : 3rd Grade of Iida Elementary School
Report : Goyosuiato-Gaien-Aigokai-Survey Group

Extracurricular study in Horikawa river
Experience & study in Horikawa river living things survey Study event in Horikawa riverParticipant : 3rd Grade of Mehoku Elementary SchoolrdParticipant : 3 Grade of Mehoku Elementary School
Participant : 3rd Grade of Mehoku Elementary School
Report : Goyosuiato-Gaien-Aigokai-Survey Group
Report : Goyosuiato-Gaien-Aigokai-Survey Group
Report : Goyosuiato-Gaien-Aigokai-Survey GroupProgress of Citizen’s Awareness -Study Meetings-

Family experience event at waterside “Horikawa Hunter Horiko”
Host : Junior Chamber International NAGOYA
Report : Goyosuiato-Gaien-Aigokai-Survey Group

Chunichi Newapaper
Morning, Feb. 22nd. 2011

2011 1st Horikawa River
regeneration forum
Place ： Nagoya Institute ofTechnology
Report : secretariat

Mini experience & study in Horikawa River
Report : Goyosuiato-Gaien-Aigokai-Survey GroupProgress of Citizen’s Awareness–Activities of “Free Survey Groups” and “Cheering Groups” –Injection of “EM Mudball” & “EM activating liquid”
by Conference for clarification of Ise Bay, Mikawa Bay andHorikawa River
Report : Goyosuiato-Gaien-Aigokai-Survey Group

Research Reportby Nagoya Urban institute
Report : Goyosuiato-Gaien-Aigokai-Survey Group

Report of free survey & research activity
by Meidensha Nishiki Survey Group

Presentation of results for one year survey
by The 24th survey group of Environmental
Department of University for Senior
Place : Horikawa River Gallary
Report : secretariat

Progress of Citizen’s Awareness–Activities of “Free Survey Groups” and “Cheering Groups” –Chunichi Newspaper
Tono area local version, Jun. 22nd. 2011
Clarification experiment of Horikawa River by water spinach
Participant : Ena Agricultural High School
Nagoya Horikawa Lions Club
Report : secretariat

Chunichi Newspaper
Morning, Jun. 18th. 2011

Introduction of “cultivation of water spinach
in Horikawa River” to Cambodia
Report ： Gifu Prefecture UNESCO Association
Ena Agricultural High School

Cleanup activity
Cars carrying relief supply to
Horikawa River after Great East Japan Earthquake Host ： Clean Horikawa
disaster area of the Great(on Mar. 12th &14th)
East Japan Earthquake
Report ： Nakanihon Engineering Consultantsby Earth Club Survey Group
Kawasemi survey group
Report : secretariat

Progress of Citizen’s Awareness–Activities of “Free Survey Groups” and “Cheering Groups” –Fixed point observation
by Shinko Survey Group

Survey of water quality for 8 hours at 6 points in Horikawa River
by Kojo & Horikawa to Seikatsu wo Kangaeru Kai Survey Group
Report : secretariat

Fixed point observation
By Earth Club

Chunichi Newapaper
Evening, May. 31st. 2011

Eco Doco
Horikawa Cheering Group
Opening Homepage Site

Progress of Citizen’s Awareness–Activities of “Free Survey Groups” and “Cheering Groups” –Cleanup Activity
by Kojo & Horikawa to Seikatsu
wo Kangaeru Kai survey Group
Report : secretariat

Cleaning Activities by Roman
Kurokawa,, Assistant Center Nanairo,
Report : Goyosuiato-Gaien-Aigokai
Survey Group

Cleaning Activity
by Nagoya Horikawa Lions Club,
local residents and Boy Scouts
Cooperation : Nagoya Seiko Kai
Report : secretariat
Cleanup Activity & Injection of EM Mudball
Host : Kurokawa Dream Kai
Report : Goyosuiato-Gaien-Aigokai Survey Group

Cleanup Activity & Fixed Point
Observation
by Nakanihon Engeering Consultants,
Kawasemi, Karugamo and Kamome
Survey Group
Cleanup Activity & Injection of EM Mudball, etc
Host : Horikawa Eco Club

Progress of Citizen’s Awareness–Activities of “Free Survey Groups” and “Cheering Groups” –Ceremony of Planting 3 trees donatedby Nagoya Horikawa Lions Club
Chunichi Newspaper
Morning, Mar. 29th. 2011

Environmental Patrolby Kojo & Horikawa to Seikatsu wo Kangaeru Kai
Report ： secretariat
Chunichi Newspaper
Morning, Feb. 18th. 2011

Yomiuri Newspaper
Morning, Apr. 8th. 2011

Progress of Citizen’s Awareness–Activities of “Free Survey Groups” and “Cheering Groups” –Activity Report
Meeting with youth of Kiso area
Host : Kiso River Basin Min-Min no Kai
for protecting river source area

Cleaning Activities by Roman
Kurokawa, Assistant Center Nanairo,
Report : Goyosuiato-Gaien-Aigokai
Survey GroupProgress of Citizen’s Awareness –Events–

Chunichi Newspaper
Morning, Feb. 27th. 2011

Horikawa River Talk & Live
『Community Development with River』～suggestion from a point of view of Community
Development and Waterside sightseeing
sightseeing～
Host ： NPO Citizen Community Development Kaze
no KaiReport : Goyosuiato-Gaien-Aigokai Survey GroupEkichika Walking
Report : Goyosuiato-Gaien-Aigokai Survey Group

Chunichi Newspaper
Morning, Jun. 5th. 2011

Nagoya Environmental Day in Spring 2011
Host : Nagoya City Environmental bureau
Experience of boarding in Horikawa River
Cooperation ： Nagoya Horikawa Lions Club

Progress of Citizen’s Awareness –Events–

The 53rd Nagoya Water Festa “Nabeyaueno Water Purification Plant Open Event”
Participant : The 25th Survey Group of Environmental Department of University for Senior
Nagoya Grampus Survey Group
Nagoya Horikawa Lions Club Survey Group
Report : secretariat

Progress of Citizen’s Awareness –Events–

Mainichi Newspaper
Morning, Aug. 22nd.
2011

Horikawa River Eco-Robot Contest 2011
Host ： Nagoya Horikawa Lions Club, Nagoya Institute of Technology
Report ： secretariat, Eco-Doco Cheering Group “http://www.eco-doco.jp”

Progress of Citizen’s Awareness –Events-

Yomiuri Newspaper
Morning, May. 14th. 2011

Horikawa Flower Festival 2011
Opening Ceremony
Report : secretariat

Horikawa Flower Festival 2011
Report : Goyosuiato-Gaien-Aigokai Survey Group