Horikawa Sen-nin Chosatai 2010 （HSC)

Summary meeting for the 21st stage

The secretariat of Horikawa Sen-nin Chosatai 2010
Sep.9th.2017

Place：
Nagoya Urban InstituteConference room (11th floor)

Photos：The secretariat of
Goyousui-ato-gaien-aigokai
Survey Group1

1. Horikawa Sen-nin Chosatai 2010nd

formation of HSC (April.22 .2007)〜Transmission of Raw Water from The
With a viewpoint and a sence of citizens, the survey of theKiso Riveｒ〜
clarification effect of TRWKR started

1.Purpose
To verify the clarification effects of TRWKR with citizens(1)Develop to new clarifying measures(2)Asses the influence on an ecosystem(3)Sustain and enhance citizens activities(4)Develop citizens awareness in the entire
Horikawa River basin

2.Water source and Volume oftransmission of raw water(1)Water Source : Kiso River(2)Volume of transmission of raw water : Maximum 0.4 m3/s

■ The survey from a viewpoint and a sence of citizens＊Clearness ＊Transparency ＊Color ＊Bubble ＊Smell＊Garbage ＊Living things, etc

3.Pilot project period(1)Evaluation and Survey term : About 5 years（from Apr.2007 to Mar.2012）(Including the term of follow-up survey and evaluation after
the stop of TRWKR)(2)TRWKR period : about 3 years(from Apr.22nd.2007 to Mar.22nd.2010)■Increase of Transmisson Volume from the Shonai River(additional pilot project）
1.Water source and Volume of transmission of raw water

The first Nagoya City Environmental Practice Prize, February.2012
Branch of contribution for Regional Environment Development Award
for Excellence(1)Water Source : Shonai River(2)Transmission Usual 0.4m3/sec (maxium 0.7m3/sec)

2.Period of Increase(1)Experiment Period ： Oct.1st - Dec.31st.2010(2)Period of Increased Transmision Volume : Oct.5th - Nov.2nd.2010

Water Resource Contributor Awards
Minister of Land, infrastructure and Transportation) Aug.20162

Transmission of Raw Water from Kiso River
3 years from April.22nd.2007（Stopped on March.22nd.2010）
To verify the clarification effects of TRWKR
Surveys during TRWKR period :April.2007 〜 March.2010
Surveys after the stop of TRWKR period :April.2010 〜 March.2012

Horikawa Sen-nin Chosatai
April.2007 〜 March.2012■ Fixed Point Observation Groups
Surveying effects of TRWKR■ Free Survey Groups Researching
Horikawa River by free themes■ Horikawa Cheering Groups Cheering
clarification of Horikawa

The survey froma viewpoint and asence of citizens

Results of pilot project (Clarification effects of TRWKR)■ It was confirmed that the water quality tended to improve
during TRWKR between Sanage Bridge and Matsushige
Bridge.
■ Network of citizens who wish for clarification andrestoration of Horikawa River expanded.
■ Citizens awareness of cleaning of the river wasdeveloped.

■ Role of Horikawa Sen-nin Chosatai(Conclusions of Summary Meeting for the 10th Stage)① More surveys should be implemented.
・Continuity of investigation, clarification of thesituation of the river, identification of cause ofpollution in the river, are needed.
・We improve our plan and take action against
the pollution.
・After that, citizens and public administration
do what is possible to clean the river.

②There are many things that citizens
can do.
・We expand our partners who love
Horikawa River and hope TRWKR again.
・We deepen exchanges with people
living in the basin of Kiso, Nagara, and Ibi
River.
・We check the effects of pollution
removal from domestic wastewater andimplement it in each house.

3

Water Environment of Horikawa River
Area of basin: 51.9km2
Length: 16.2km(Tidal effect section 13.6km)

Change in temperature, precipitationand hours of sunshine
Cause of breedingofpphytoplankton,
nitorogen andphosphorus areincluded inwastewater fromhouses, factories
andstores.

The primary cause of water pollution is wastewater from houses, factories, and stores.
Wastewater is discharged after treatment in wastewater treatment plant.
●●●

After heavy rain, wastewater isdischarged without treatment.

It has looked like redtide or blue tide.
In Nagoya Port anddownstream ofHorikawa, it is said
that phytoplankton
does over breedingand extinction, so
water basin is polluted
Red Tide

Kiso River is our water source.

●●●●●● ●●●●●●

Shonai River
Privisional raw watertransmission: 0.3m3/s

●●●

●●●

●●●

Wastewater
Treatment Plant

Tide Gate

Sanage Bridge

Motoiri Sluiceway▼High Tide Horikawa River
Difference of water level is more than 2m between
high tide and ebb tide.
Water level, direction of current and velocity are changed, by tide.

▼Ebb Tide

Nagoya Port

Shimizu wakuwaku-sui

Groundwater, etc

RisingIse Bay
Blue Tide

Sludge rises and floats.

Floating Sludge

Raised Sludge

4Observation method at fixed-point
Measurement of Transparency
Transparency
Meter
100cm
Photo: Shinko Survey Group

What is yourimpression of…
Clearness?
Transparency?
Color? Bubbles?
Smell? Garbage?
Living things?

Measurement of COD
COD: Chemical Oxygen DemandThis is an index of water contamination
used for sea, lakes, and marshes.
It is an oxygen consumption required foroxidation of organic matters dissolved inample water.
The higher COD, the more it iscontaminated.

COD Pack Test

Yuri-no-kai Survey Group
Photo: Goyosui-ato-gaien-aigokai
Survey Group

Photo: Goyosui-ato-gaien-aigokai
Survey Group5

Number of Participants ofHorikawa Sen-nin Chosatai

Investigation spots(Horikawa Sen-nin Chosatai started
accepting participation on 26th Mar.2007)
Network of citizens who wish for clarification
and restoration of Horikawa River is growing.

More than 50 thousand citizens network
Horikawa, the Mother River of Nagoya, was polluted in rapid economic growth..
The citizens have rised to get the past back.

Start

Now

22nd Apr.2007

9th Sep.2017

Fixed Point
Observation
Groups55 groups
497 persons

100 groups
1,008persons

Free Survey
Groups

22 groups
234 persons

40 groups
650 persons

Horikawa
Cheering
Groups

88 groups
1,531 persons

2,593 groups
51,778 persons

Total

165 groups
2,262 persons

2,733 groups
53,436 persons

6

Number of Participants
Number of Participants in 3 classes
60,000

FPOG

FSG

HCG

total

55,00050,000
Fixed Point Observation Group (FPOG) 1,008

45,000Free Survey Groups (FSG)◆ Fixed Point Survey Groupsurveying on the fixed points◆ Free theme Survey Groupsurveying on free themes◆ Horikawa Cheering Groupsupporting clarification of Horikawa

650

40,000Horikawa Cheering Groups (HCG)

35,000total

51,77853,43630,00025,00020,000

第1st

第6st

第4st

第2st
第3st

第5st

第10st

第8st
第7st

第9st

第12st
第11st

第13st

第14st

第16st
第15st

第18st
第17st

第20st
第19st

第22st

第21st

15,00010,000
5,000

H19.4
H19.8
H19.12
H20.4
H20.8
H20.12
H21.4
H21.8
H21.12
H22.4
H22.8
H22.12
H23.4
H23.8
H23.12
H24.4
H24.8
H24.12
H25.4
H25.8
H25.12
H26.4
H26.8
H26.12
H27.4
H27.8
H27.12
H28.4
H28.8
H28.12
H29.4
H29.8
H29.120

Sep 2017

7

3. Survey Periods and Number of Reports
With TRWKR

Utilization ofshallow groundwater
At upstream fo
Kitashimizu bridge

Introduction of advanced
water treatment at the Meijo
Water Treatment Center
In-service of Horikawa
Ugan Rain-Water Reservoir
for pollution control

Increase of Transmission
Volume fromthe Shonai River

Utilization of reclamed
wastwater from Moriyama
Water Treatment Centerfrom Apr. to Oct.
At upstream of
Seko Bridge

At upstream of
Sanage Bridge

Covered sandAt upstream of
Shiga Bridge

At upstream of
Nakatodo Bridge

total

Survey Period
1st stage
Spring〜Early summer/Apr.22nd〜Jun.30th.2007
interval
Jul.1st〜Sep.7th.2007
2nd stage
Autumn〜Early Winter/Sep.8th〜Dec.16th.2007
interval
Dec.17th.2007〜Mar.31st.2008
3rd stage
Spring〜Early summer/Apr.1st〜Jun.30th.2008
interval
Jul.1st〜Sep.27th.2008
4th stage
Autumn〜Early Winter/Sep.28th〜Dec.16th.2008
interval
Dec.17th.2008〜Mar.31st.2009
5th stage
Spring〜Early summer/Apr.1st〜Jun.30th.2009
interval
Jul.1st〜Sep.26th.2009
6th stage
Autumn〜Early Winter/Sep.27th〜Dec.16th.2009
interval
Dec.17th.2009〜Mar.31st.2010
7th stage
Spring〜Early summer/Apr.1st〜Jun.30th.2010
interval
Jul.1st〜Sep.11th.2010
8th stage
Autumn〜Early Winter/Sep.12th〜Dec.17th.2010
interval
Dec.18th.2010〜Mar.31st.2011
9th stage
Spring〜Early summer/Apr.1st〜Jun.30th.2011
interval
Jul.1st〜Sep.10th.2011
10th stage
Autumn〜Early Winter/Sep.11th〜Dec.16th.2011
interval
Dec.17th.2011〜Mar.31st.2012
11th stage
Spring〜Early summer/Apr.1st〜Jun.30th.2012
interval
Jul.1st〜Sep.21th.2012
12th stage
Autumn〜Early Winter/Sep.22th〜Dec.16th.2012
interval
Dec.17th.2012〜Mar.31st.2013
13th stage
Spring〜Early summer/Apr.1st〜Jun.30th.2013
interval
Jul.1st〜Sep.28th.2013
14th stage
Autumn〜Early Winter/Sep.29th〜Dec.17th.2013
interval
Dec.18th.2013〜Mar.31st.2014
15th stage
Spring〜Early summer/Apr.1st〜Jun.30th.2014
interval
Jul.1st〜Sep.28th.2014
16th stage
Autumn〜Early Winter/Sep.29th〜Dec.16th.2014
interval
Dec.17th.2014〜Mar.31st.2015
17th stage
Spring〜Early summer/Apr.1st〜Jun.30th.2015
interval
Jul.1st〜Sep.19th.2015
18th stage
Autumn〜Early Winter/Sep.20th〜Dec.16th.2015
interval
Dec.17th.2015〜Mar.31st.2016
19th stage
Spring〜Early summer/Apr.1st〜Jun.30th.2016
interval
Jul.1st〜Sep.19th.2016
20th stage
Autumn〜Early Winter/Sep.20th〜Dec.16th.2016
interval
Dec.17th.2016〜Mar.31st.2017
21st stage
Spring〜Early summer/Apr.1st〜Jun.30th.2017

reports
258
134
383
103
245
64
152
100
145
54
120
81
111
44
104
72
112
42
133
77
148
60
139
92
145
70
113
79
133
91
99
107
113
81
126
91
127
62
130
104
128
4,772

8

Number of Reports

400 reports
every year

Over 50,000 people joined in Chosatai.
Number of reports is above 4,700 in total.

9

4. Report of the 21st stage survey
4.1. Introduction 〜Column〜〜Column〜

For the clarification and regeneration of Horikawa River

Horikawa Sen-nin Chosatai was established at 22nd April, 2007, as a place for citizens activities, such as Fixed Point
Observation Group, Free Survey Group and Cheering group, for clarification and regeneration of Horikawa River.
Fixed Point Observation Group examines Horikawa River from a viewpoint and a sense of citizen to confirm the clarification
effect by the measures for water quality improvement and to make clear condition of water quality and cause of pollution. Free
Survey Group study Horikawa River from various view point. Cheering group supports clarification and regeneration of Horikawa
River in various ways. Then the three groups wish for clarification and regeneration of Horikawa River, and work together in alarge network.
Currently(Sep.9th. 2017) there are a total of 2,733 groups and 53,436 persons in HSC, 100 groups in Fixed Point Observation
Group, 40 groups in Free Survey Group and 2,593 groups in Cheering Group. At the time of launch there were 165 groups and2,262 persons. It shows that the network of citizens wishing for clarification and regeneration of Horikawa River has expanded
greatly (conference2 : pp7.8).
Fixed Point Observation Group observed 4,772 times from 1st stage to 21st stage. So far, we found that the state of the waterchanged from moment to moment due to the influence of the tides, at the downstream from the Sanage Bridge. And we can foundthat a lot of observation results from the Fixed Point Observation Group can capture the average state of water quality ofHorikawa River by citizens point of view and sense, and understand the tendency of the change. (conference3 : pp9.10)~Social experiment of the clarification of Horikawa River Confirmation of clarification effect of TRWKR from April.2007 to
March.2012 ~We confirmed that water quality between Sanage Bridge to Matsushige Bridge had been improved by TRWKR(0.4m3/sec.) in five
years. And in this period, we confirmed that the garbage (Artificial garbage: plastic type garbage etc.)reduced. It seems that theconsciousness of the citizen changed, such as the cleaning activity became active.
【Five years summary】■We confirmed clarification effect of TRWKR.
■Network of citizens wishing for clarification and regeneration of Horikawa River has expanded greatly.
■Consciousness of the citizen changed, such as the action of the cleaning activity became active.

10

(１) Weather
There were many sunny days, therefore time of sunshine was long, temperature was high and precipitation was little in the 21ststage. Especially there were many sunny days and even days on which the temperature goes above 30℃ in May. The rainyseason began on June 7th, which is as early as usual.

Summary ： Many sunny days, High temperature and Little rain
(２) New Measures for Water Quality Improvement
After TRWKR, new measures for water quality improvement have been put into effect, for example Introduction of Advanced
water treatment at Meijo Water Treatment Center, Making shallow and deep for improvement of self-purification function andwater environment at upstream section of the Sanage Bridge and In-service of Horikawa Ugan Rain-water Reservoir for pollution
control in 2010, and Utilization of reclaimed wastewater at Moriyama Water Treatment Center 4,000m3/day(0.046m3/sec)
conducted during irrigation season(Apr.-Oct.)in 2011. In addition, Experiment of covering sand for water purification
between the Naka Bridge and the Gojo Bridge in Feb 2015.
Utilization of shallow ground water as new water source has been introduced at the upper and middle section since 2004, and
new utilization of shallow ground water(0.01㎥/s) began from the 7th well at the upstream of the Nakatsuchido Bridge in May
2016.
Horikawa sen-nin Chosatai has surveyed changes of Horikawa River from a view point and a sense of citizens , confirmed theeffect of measures for water quality improvement and reported on themes about improvement of self-purification function by afood chain and hint for idea about the waterside environment in which it s difficult for sludge to be accumulated .

(３) Change of Water Quality
The water quality, measured by Impression, Transparency, COD, Bubbles and Smell, worsened after TRWKR.
Then, it sometimes worsened because of phenomena related to the weather, such as red tide and blue tide, but in general, it has
showed tendency to be gradually improved from the upstream section. We believe that change of citizens awareness for
purification and regeneration and government s new measures made it.
In the 21st stage, transparency met citizens tolerance revel(70cm) for the first time in the Spring to Early Summer stage after
TRWKR, (74cm between the Sanage Bridge and the Johoku Bridge). But it is further from the revel in the downstream from the
Asahi Bridge.

We need to continue surveying based on observation at fixed points and all together survey of the spring tide
to make clear mechanism of water quality deterioration including caused by weather and tidal level andefficient and effective measures from a viewpoint and sense of citizens

11(４) Relation between water quality and evaluation
There was a correlation between the impression of water clearness(the rate of clean - ordinary )and the evaluation of rate oftransparency , so it was confirmed that the rate of clean - ordinary increases as the evaluation of transparency increases.
We think that the measures of improve the transparency of citizens evaluation have the direct measure reduce turbidity in waterand the other measure focusing on the fact that transparency changes depending on the depth of water and the conditions of theriver bottom(18th Report ̲ Relation between tidal level and water quality) .
Various measures that to start service, Horikawa-Sagan Rain-water Reservior and Improvement of simple sewage treatment in Meijo
Water Treatment Center and improvement of water quality of water source, Acquisition of new source of water, dredging of sludge(prevention of sludge winding up), covered sand (improvement of natural purification function + improvement water depth and riverbottom condition） , were expected to be improved the impression of water clearness.
Relation between tidal level （depth） and impression of water clearness

Relation between the rate of impression Clean - Ordinary
and the rate of time evaluated impression transparency＊few date

Impression of water clearness
Tidal level at Nagoya Port, T.P.(cm)Sanage bridge - Asahi bridge

Dirty
date

Slightly
dirty

Ordinary

Slightly
clean

Clean
Average

参考資料
th Report p25
18
第18回調査隊会議報告p.25

12

(５) Living things
A school of goby was found going upstream early in April this year. Young mullet going upstream was found on
May 15th, which was about 1 month later than last year. This may have been effected by unusual weather suchas late bloom of cherry blossom. After that, a lot of young mullets went upstream. Great cormorants that catchand eat mullets have been seen many times.
However, on the other hand, mass death of dotted gizzard shad and mullet occurred in late April and late July.
Both of them occurred when it was spring tide and also rainy day.
The cause of these phenomena is considered to be lack of oxygen in water.
These phenomena are met with the mechanism of mass fish death occurring in case of spring tide and rainy
weather, which the HSC have reported.
An exotic soft-shelled turtle was found in Horikawa River for the first time. It was considered as pet throwed
away into the river by someone.
An exotic soft-shelled turtle appeared in Horikawa
Mass death of fish occurred in late April and late July.
Temperature Rise

Spring Tide
RainfallA kind of Amerika soft-shelled turtle

Rapid poor oxygenation in water Ref,thFish which fails to escape→dead19 survery meeting
repot p.83

A great cormorant catchesand eats a mullet

13(６) Water quality in Shin-Horikawa River
Number of surveys in Shin-Horikawa reached 276 at the end of the 21st stage （118 surveys in the 21ststage）. Because of the small number of data, this survey is organized by using all data (including results incase of rain on the day before and on that day).
Suvery results show that Impression of water clearness between Maizuru Bridge and Horagai Bridge is
especially bad, and Transparency , COD , and Bubbles , and Smell were also bad in the upstream
section.
To check the difference of water quality between Horikawa and Shin-Horikawa, Impression of water
clearness , Transparency , COD , Smell , Bubbles , and Color of Horikawa (between Shin-Suzaki
Bridge and Oseko Bridge: almost same position from Nagoya Port with Shin-Horikawa) and Shin-Horikawa areorganized and compared.
アメリカスッポン属の一種

Sanno Bridge, Horikawa

Oi Bridge, Shin-Horikawa

Comparison between Horikawa and Shin-Horikawa(high tide and ebb tide) on May 12 （spring tide）■ river water was seen clouded at the upstream
section of Shin-Horikawa

11:10 AM (high tide)

10:40 AM (high tide)

15:00 PM (ebb tide)

14:40 PM (ebb tide)■ changes of water color in Shin-Horikawa was large

14

Impression of water clearness of Shin-Horikawa wasfound worse than Horikawa. Although there was no big
difference in transparency (surface), COD (surface),
smell , bubbles from river bottom of Shin-Horikawa
was worse than Horikawa.
Ratio of milky and sludge color was large inHorikawa, but on the other hand ratio of milky and red
tide was large in Shin-Horikawa.
These differences are very important for investigating
mechanism of river dirtiness of Horikawa and ShinHorikawa and considering the countermeasures.
Impression of water clearness

64%

Smell

23%

35%

4%

Bubbles

23%

75%

Color

ＣＯＤ

24%

29%

15

(7) Simultaneous survey of spring tide1) Imaging floating objects and sludge (Planning: secretariat, shooting / editing: VIDEO Net)At the time of high tide from the rising tide to the spring tide, a moving image was taken
in which floating objects gathered from the downstream (tide tip) reached near Gojo
Bridge, and when the tide turned down, they moved downstream. Furthermore, a videoof dead fish floating on the tip of the tide and some dotted gizzard shads bouncing thewater surface was shot (citizen contribution). These are valuable picture showing thatthe vicinity of the tide is becoming the boundary between the life-and-death of dotted
gizzard shad (the boundary with the area of poor oxygenation). These videos and thevideos shot in the past were compiled together under the theme "Horikawa Oshio story".
This image is a valuable material as visual information for taking measures, thinking
about the current situation and mechanism of Horikawa related to floating litters andsludge which affects the impression of water stains.
Accumulation and Migration of Floating objects

Time of low tide

Time of high tide

Floating materials are repeatedly
accumulating, descending andaccumulating in Horikawa river bytides.
A part of the floating objects
decomposes and sediments and it
becomes a sludge at the bottom of
the river.

162) Impression of water dirtiness at spring tide
■ Horikawa river

Simultaneous survey of spring tide

① Upstream section of Horikawa (upstream from Sanage Bridge)
There was turbidity of gray yellow green with the water from
Shonai irrigation, and the upstream section was affected by this.
② Habashita Bridge to Kameya Bridge
Accumulation of floating matter, hoisting up and exposure ofsludge were confirmed, and the impression of water dirtiness wasaffected by this.
堀川・錦橋
4月28日13時07分

庄内川・水分橋
4月28日11時56分

turbidity of gray yellow green

hoisting up and exposure of sludge■ Shinhorikawa river① Upstream section"Egg rotten smell" was reported, and the problem of "smell"became obvious.

② Near the confluence of Horikawa
Sludge was sedimented and exposed, and there were stiffness,sludge smell and clouding from the river bottom.

③ All sections of Shinhorikawa river
There are no reported events as the influence of sludge hoisting
like Horikawa.
新堀川 内田橋付近
新堀川 内田橋付近
4月27日
12時10分Sediment accumulatingon the bottom of the river is exposed

4月27日
12時11分

bubbles from sludge

4月28日
14時01分Sediment accumulatingon the river bottom is exposed173) Transparency during Spring Tide

5) Living things （see p.102〜104）■ Horikawa River
It was under 70cm in the downstream of Sujikai Bridge
due to sludge raised up by tide.
■ Shin-Horikawa River
It was over 70cm and better than that of Horikawa
River. But we received a report that water of ShinHorikawa River often seemed be milky, which does notsupport the result on transparency.
After visited the site, we guess that water of ShinHorikawa River has two layers : clear top layer and milkybottom layer, and they do not mix together easily.
Shin-Horikawa River has deferent features about watertemperature, seawater on the river bed and so on. Thisis a remarkable point when we think how to clean these
two rivers. We need more investigation.

① Jerry fish
Living jerry fish was seen around Shirotori Bridgeon Horikawa River. It could be pushed up from
Nagoya Port in high tide during spring tide.
② Dead fish
Dead fish were seen from Apr.26, two days before
mass investigation(precipitation 11.5mm), and also
seen in Horikawa River on 28. This supports our
hypothesis about dead fish when it rains during
spring tide.
Dead fish were not seen in Shin-Horikawa River.

clear top layer

2 layers

milky bottom layer4) ＣＯＤ during Spring Tide （see p.101）
ＣＯＤ of Shin-Horikawa River was between 10mg/L to
50mg/L and higher than that of Horikawa River.
Although the reason is not sure this is a remarkable
point, too.

18

4.15. Progress of Citizen s AwarenessActivities of studies 8th Horikwa Round Table Horikawa Machidukuri
Mar. 28th, 2017 report:secretariat

Horikawa Sen-nin Chosatai 2010
Summary meeting for the 20th stage
Feb. 18th, 2017 report：secretariat

9th Horikwa Round Table Horikawa Machidukuri
Aug. 3rd, 2017 report:secretariat『伊勢湾流域圏再生フォーラム』
Mar. 4th, 2017
place：Nagoya Future Culture College「歴史町歩き」 organizer ：Kita Ward Office
Mar. 4th, 201719
19

Progress of Citizen’s AwarenessActivities of studies

主催・協力・報告：黒川ドリーム会・御用水跡街園愛護会調査隊・ロマン黒川

飯田小学校３年生 黒川観察会
Jun. 16th, 2017

八熊小学校２年生
黒川観察会
Jun. 26th, 2017

春の環境デーなごや２０１７ 堀川体験乗船「身近な自然体験会〜船から発見！ 私たちの堀川」主催：名古屋市環境局が主催
協力：名古屋堀川ライオンズクラブ
Jun. 3rd, 2017 place：Atsuta Ward shirotori pier

笹島小学校５年生
黒川観察会
Jul. 3rd ,2017

名古屋市立なごや小学校４年生 堀川環境学習
Jun. 12th, 2017
報告：事務局、堀川まちづくりの会事務局、鯱城・堀川と生活を考える会

堀川上流で川遊び
Jul. 8th 2017
大杉小学校２年生 黒川観察会
Jul. 4th, 201720

Horikawa Clean Experiment with Chinese Water Spinach June 16th 〜 October, 2017

Jul. 14th

By Ena Agricultural High School, Nagoya Horikawa Lions Club, ESPEC MIC Corp.
Place：near the pier of Naya Bridge

experiment started June 16th

Jul. 21thJun. 23th

Jul. 28th
Jun. 30th

Jul. 7th

Aug. 4th21

Activities of “Free Survey Groups” & “Cheering Groups”

柵の塗装 塗り替え
Feb. 22th, 2017
場所：黒川上流部 辻栄橋近辺
報告：御用水跡街園愛護会調査隊

納屋橋付近に設置された素敵な案内板
Mar. 24th, 2017
報告：かわせみ調査隊

名古屋堀川ライオンズクラブ
名古屋北ライオンズクラブ、名古屋城北ライオンズクラブ
合同アクティビティ
堀川上流部 看板の拭き掃除を実施
Apr. 1st, 2017 場所：北区 御用水跡街園左岸付近

２０１７年 春の堀川一斉大そうじ 主催：クリーン堀川
Apr. 15th 2017 報告：事務局

22

Activities of “Free Survey Groups” & “Cheering Groups”

定点調査 地球倶楽部調査隊 Apr. 4th, 2017
場所：住吉橋、瓶屋橋、旗屋橋、熱田記念橋、御陵橋

猿投橋の下流に大きな台車・撤去作業
Jun. 20th, 2017
報告：御用水跡街園愛護会調査隊

清掃活動 ぎふしんムーミン清水支部 堀川応援隊
Jun. 10th, 2017 場所：北清水橋周辺

堀川の川開きを開催
May. 26th, 2017
場所：稚児の宮人道橋
報告：御用水跡街園愛護会調査隊

猿投橋の下に黄色いスッポン
Jun. 23th, 2017
報告：御用水跡街園愛護会調査隊
定点調査・清掃活動
中日本建設コンサルタント㈱かわせみ調査隊

電柱などの撤去 Jun. 1st, 2017 報告：かわせみ調査隊

23

Activities of “Free Survey Groups” & “Cheering Groups”「第５回 鯱城・堀川清掃大作戦」の報告
鯱城・堀川と生活を考える会
http://www.horikawa1000nin.jp/katudou/201702-16-horikawaseisou.htm

鯱城・堀川と生活を考える会
平成２８年度 堀川浄化活動報告書
http://www.horikawa1000nin.jp/katudou/2017-0606-kojouhorikawaseikatu.htm

水質調査活動報告 明電舎錦調査隊
平成２８年９月〜平成２９年５月まで
http://www.horikawa1000nin.jp/katudou/2017-05-24-meidenshanisiki.htm

活動報告 「上流は下流を思い、下流は上流に感謝する」
水源の里を守ろう 木曽川流域みん・みんの会
http://www.horikawa1000nin.jp/katudou/2017-07-18minminnokai.htm

活動レポート
環境ボランティアサークル「亀の子隊」
http://www.horikawa1000nin.jp/katudou/
2017-06-01-kamenokotai.htm

活動レポート
伊勢湾流域圏再生ネットワーク事務局
http://www.horikawa1000nin.jp/katudou/2017-05-01-isewannet.htm

24Activities of “Free Survey Groups” & “Cheering Groups”

中日新聞 平成２９年２月１７日（金）市民団体 「クリーン堀川」の機関誌
http://www.horikawa1000nin.jp/katudou/201703-28-cleanhorikawa.htm

中日新聞 平成２９年５月２０日（土）環境情報誌「Risa」
堀川１０００人調査隊の活動紹介掲載 平成２９年６月３日発行
http://www.horikawa1000nin.jp/katudou/2017-06-04-RISAkiji.htm

中日新聞

読売新聞

平成２９年６月１７日（土）

平成２９年７月１３日（土）25Events
Horikawa Yuzen Nagashi Apr. 1st, 2017
北区民まちづくり推進協議会

Horikawa Flower Festival ２０１７
May. 12th 〜 27th , 2017

報告：御用水跡街園愛護会調査隊
事務局
報告：事務局

26

第１３回 堀川エコロボットコンテスト２０１７
Jul. 27th, 2017
主催：名古屋堀川ライオンズクラブ、名古屋工業大学

Events
なごや水フェスタ
Jun. 4th, 2017
場所：鍋屋上野浄水場
主催：名古屋市上下水道局■参加した調査隊
名古屋市高年大学環境学科３１期調査隊
名古屋堀川ライオンズクラブ調査隊
報告：事務局

小学生向けロボット工作教室
Jul. 5th, 2017 報告：事務局

堀川エコロボットコンテスト２０１７
Arg. 27th, 2017
報告：事務局「木曽御岳山麓ふっこう割キャンペーン
Jul. 1st, 2017〜Feb. 11th, 201827