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Forests of radiation air dose - citizen in Yokohama-shi (from the surface of the earth 0.5m in height)

●Measurement contents
 We measure space γ (gamma) dose of radioactivity of surface of the earth 50cm about citizen's forests.

●Start of measurement time
  October, 2011

●Publication of result of a measurement
We announce after the next day on measurement day.

●About measuring equipment
 Measuring instrument which we used for the measurement has following two kinds.

≪Until from October 7, 2011 to December 7≫

TCS-172B (product made in Hitachi Aloka Medical Corporation)

Detector NaI(TI) scintillation detector

≪After January 24, 2012≫

Mr.Ganma A2700 type (product made in clear pulse company)

Detector CsI(TI) scintillation detector

[the measurement situation]

The ward name Facility name The location Measurement day Weather Result of a measurement (μSv/h) ※1
Sakae Ward Forest of Yokohama nature observation  Kamigocho, Sakae-ku 2011 10/7 Fine weather 0.06-0.08
Kanazawa Ward Forest of Kamariya citizen Kamariyacho, Kanazawa-ku 10/14 Fine weather 0.07
Totsuka Ward Forest with Maioka oldness Maiokacho, Totsuka-ku 10/14 Cloudy weather


Sakae Ward Forest of wild Izawa citizen Kudencho, Sakae-ku 10/24 Cloudy weather 0.05-0.08
Kanagawa Ward Forest of hokenjishimin Mitsuzawanishimachi, Kanagawa-ku 10/24 Cloudy weather 0.05-0.06
Midori Ward Forest of citizen of Kamoi Haraichi Kamoi, Midori-ku-cho 10/24 Cloudy weather 0.06-0.08
Asahi Ward Forest of Oiwake, arrow finger citizen Yasashicho, Asahi-ku 11/1 Fine weather 0.04-0.07
Midori Ward Forest of Shinji citizen Niiharucho, Midori-ku 11/1 Fine weather 0.05-0.09
Hodogaya Ward Forest of boundary tree contact Sakaigihoncho, Hodogaya-ku 11/2 Fine weather 0.04-0.08
Totsuka Ward Forest of Kamiyabe contact Kamiyabecho, Totsuka-ku 11/2 Fine weather 0.04-0.06
Tsurumi Ward Forest of Higashiterao contact Higashiterao, Tsurumi-ku 11/2 Fine weather 0.06-0.09
Izumi Ward Forest of forest contact of spring Okazucho, Izumi-ku 11/7 Cloudy weather 0.04-0.05
Asahi Ward Forest of Tsurugamine contact Tsurugamine, Asahi-ku 11/7 Cloudy weather 0.04-0.05
Asahi Ward Forest of Shirane contact Shirane, Asahi-ku 11/7 Cloudy weather 0.05-0.06
Sakae Ward Forest citizen's in the shallows Kamigocho, Sakae-ku 12/7 Fine weather 0.08
Isogo Ward Forest of Hitorizawa citizen Hitorizawacho, Isogo-ku 12/7 Fine weather 0.05-0.08
Kanazawa Ward Forest of Kanazawa citizen Kamariyacho, Kanazawa-ku 12/7 Fine weather 0.05-0.08
Aoba Ward Forest with servant of a Buddhist temple oldness Jikecho, Aoba-ku 2012 1/24 Fine weather 0.06
Aoba Ward Forest of Moegino contact Moegino, Aoba-ku 1/24 Fine weather 0.04
Midori Ward Forest of Ueyama contact Kamiyama, Midori-ku-cho 1/24 Cloudy weather, snow 0.07
Midori Ward Forest of sanhoshimin Mihocho, Midori-ku 1/24 Cloudy weather, snow 0.05
Totsuka Ward Poleax is forest of deep water citizen Gumizawa, Totsuka-ku-cho 1/27 Fine weather 0.05
Totsuka Ward Forest of uitorihhi Matanocho, Totsuka-ku 1/27 Fine weather 0.05
Sakae Ward Forest of Iijima citizen Iijima-machi, Sakae-ku 1/27 Fine weather 0.07
Sakae Ward Forest of Kamigo citizen Kamigocho, Sakae-ku 1/27 Fine weather 0.06
Tsurumi Ward Forest of citizen of Goichi in Komaoka 3, Komaoka, Tsurumi-ku 2/2  Fine weather 0.07
Tsurumi Ward Forest of turnip and mound contact 3, Komaoka, Tsurumi-ku 2/2 Fine weather 0.03
Kohoku Ward Forest of Tsunashima citizen Tsunashimadai, Kohoku-ku 2/2 Fine weather 0.09
Kohoku Ward Forest of Kumano Shrine citizen Morokacho, Kohoku-ku, Tarumachi 2/2 Fine weather 0.05
Kanazawa Ward Forest of Seki ke valley citizen Kamariyanishi, Kanazawa-ku 2/3 Fine weather 0.04
Kanazawa Ward Forest of designation name temple citizen Kanazawacho, Kanazawa-ku, Yatsu-cho 2/3 Fine weather 0.03
Kanazawa Ward shibachohamaryokuji 2, Nagahama, Kanazawa-ku 2/3 Fine weather 0.07
Isogo Ward Forest of hoshimin isokokuhocho 2/3 Fine weather 0.08
Seya Ward Forest of Miyazawa contact Miyazawa, Seya-ku-cho 2/9 Fine weather 0.03
Seya Ward Forest of Higashiyama contact Miyazawa, Seya-ku-cho 2/9 Fine weather 0.05
Seya Ward Forest of Seya citizen Seya, Seya-ku-cho, Azumanodai 2/9 Fine weather 0.05
Asahi Ward Sasanodai green tract of land 1, Kanegaya, Asahi-ku 2/9 Fine weather 0.04
Asahi Ward Futamatagawa new subdivision green tract of land Imajuku, Asahi-ku-cho 2/9 Fine weather 0.04
Hodogaya Ward Sakuragaoka green tract of land Sakuragaoka, Hodogaya-ku 2/9 Fine weather 0.04
Kohoku Ward Forest of Kozukue ruins of a castle citizen Kozukuecho, Kohoku-ku 2/10 Fine weather 0.05
Tsurumi Ward Forest of Shishigaya citizen Shishigaya, Tsurumi-ku-cho 2/10 Fine weather 0.07
Kanagawa Ward Shirohata west green tract of land Shirahatanishicho, Kanagawa-ku 2/10 Fine weather 0.06
Asahi Ward Harvest festival mountain green tract of land Kawajima-machi, Asahi-ku 2/13 Fine weather 0.05
Asahi Ward Forest of Ichizawa contact Ichizawacho, Asahi-ku 2/13 Fine weather 0.05
Asahi Ward Forest of Minamihonjyuku citizen Minamihonjukucho, Asahi-ku 2/13 Fine weather 0.05
Konan Ward Forest of Shimonagaya citizen Shimonagaya, Konan-ku 2/13 Fine weather 0.05
Minami Ward 3, Ooka green tract of land 3, Ooka, Minami-ku 2/13 Fine weather 0.06
Izumi Ward Forest of Nakata contact Nakadamachi, Izumi-ku 2/17 Fine weather 0.03
Izumi Ward Forest of carp ke Kubo contact 1, Nakataminami, Izumi-ku 2/17 Fine weather 0.03
Totsuka Ward Tomizuka Yahata green tract of land Totsukamachi, Totsuka-ku 2/17 Fine weather 0.03

※1 unit μSv/h (in microsievert /)

●Explanation of result of a measurement
Measurements are less than 1mSv a year (millisievert) that is target value of Motoichi. (as unified thought of Motoichi, we calculate like school for eight hours a day saying that we stay in citizen's forests for 210 days for one year.)

In addition, we measure in elementary school, junior high school, nursery school, park in the city.
  Elementary and junior high school http://translate-en.city.yokohama.lg.jp/kyoiku/hou-sokutei/
  Nursery school http://www.city.yokohama.jp/me/kodomo/unei/sokutei.html
  Park http://translate-en.city.yokohama.lg.jp/kankyo/park/sokutei.html

You can see radiation result of a measurement performing fixed-point observation (environmental science research institute, Tsuzuki Ward   government office, southern part greenery office) at altitude of 50cm and 1m from the surface of the earth in the city from this.

(as for the inquiry)


 City of Yokohama, Environmental Planning Bureau green up promotion section


 Telephone 045(671) 2624 fax 045(224) 6627


 (reception hours: for from Monday to Friday for from 8:45 to 17:15)


City of Yokohama, Environmental Planning Bureau green up promotion part green up promotion section - October 21, 2011 Making - March 12, 2012 Update
Opinion, inquiry - ks-midoriup@city.yokohama.jp - telephone: 045-671-2624 - FAX: 045-224-6627
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