著者

千葉 達朗 林 信太郎 小野田 敏 栗原 和弘 藤田 浩司 星野 実 浅井 健一

出版者

一般社団法人 日本地質学会

雑誌

地質学雑誌 (ISSN:00167630)

巻号頁・発行日

vol.103, no.6, pp.XXI-XXII, 1997 (Released:2010-12-14)

被引用文献数

1

---

5月11日午前8時, 秋田県鹿角市の澄川温泉で, 地すべりと石流が発生, 澄川温泉と赤川温泉の16棟が全壊, 国道341号も寸断された. 5月4日頃から水の濁りや道路の変状等が察知され, 適切な警戒避難が行われたため, この災害による死者・負傷者はなかった. なお, 地すべりの最中に末端付近で水蒸気爆発が発生した. ここでは, 5月12日にアジア航測(株)が撮影した空中写真, その後の現地の他, 秋田航空(株)が撮影した水蒸気爆発の瞬間の写真を紹介する.

著者

辻 智大 岸本 博志 藤田 浩司 中村 千怜 長田 朋大 木村 一成 古澤 明 大西 耕造 西坂 直樹 池田 倫治 太田 岳洋 福岡 仁至

出版者

特定非営利活動法人 日本火山学会

雑誌

火山 (ISSN:04534360)

巻号頁・発行日

vol.68, no.3, pp.129-160, 2023-09-30 (Released:2023-11-02)

参考文献数

49

---

Kuju volcano, located within Beppu-Shimabara graben central Kyushu, Southwest Japan, has been active in the recent 200,000 years. The 54 ka Handa eruption, as large as VEI 5 or 6 and the largest one of the volcano, released large-scale pyroclastic flow deposits (Handa pfd; Kj-Hd) and a wide-spread tephra (Kj-D ash and Kj-P1 pumice fall deposits) that has been reported at more than 500 km from the source. The stratigraphic relationships among the deposits from the Handa eruption are important for volcanology and disaster prevention, and have been studied in various studies, but there is no consensus on the stratigraphy. In this study, we examined the stratigraphic relationships and the eruption history based on the stratigraphic and petrographic studies around Kuju volcano, as well as on Shikoku and Honshu Islands. As the results, the stratigraphic relationships were revealed as follows. 1) The pumice fall deposit, that has been named Kj-Yu, was previously included in Kj-D ash layers, but is revealed to be a much older ejecta than Kj-D ash, along with the tephras newly named Kj-Tb1 and 2. 2) The clay-rich layer just below Kj-D was previously considered to be soil, but it contains a large number of volcanic ash particles so that it is defined as Kj-Y ash layer. 3) Three light brown fine ash layers, newly named Kj-D-U2, 4 and 6, sandwich between the blue grey sandy ash layers i.e. Kj-D-U1, 3, 5 and 7, are revealed to be the co-ignimbrite ash derived from Kj-Hd 1, 2 and 3 pfd, respectively. It suggests that the Kj-Hd1, 2 and 3 pfd are interbedded with Kj-D-U ash layers. 4) Kj-P1 overlies on Kj-D-U7 ash layer that mantled the reworked deposit of Kj-Hd3. 5) Kj-P1 is divided into lower and upper units based on the grain-size analysis, petrography, the chemical composition of glass shards and the isopach maps. Kj-S pfd was formed in the same time as the upper unit. Based on the results, the eruption history is assumed as follows. Pre-Handa eruption: the activity was low and the small-scale explosive eruptions that had released the pumice and volcanic fragments in loam (Kj-Y), followed by a relatively large explosive eruption that had formed Kj-AL. Early phase: the eruption started with phreatic eruption, sub-plinian eruption that deposited the lower unit of Kj-D ash. Subsequently, the eruption changed to vulcanian eruptions that ejected Kj-D-U. This eruption continued for a long period time. During the time, three large-scale pyroclastic flow eruptions happened and has formed Kj-Hd1, 2 and 3. Their co-ignimbrite ashes generated from the Kj-Hd pfds were deposited as Kj-D-U2, 4 and 6. Lahar were generated after Kj-Hd2 and 3 deposition. This phase was terminated by the deposition of Kj-D-U7 ash. Late phase: the plinian plumes occurred twice and deposited lower and upper lalyers of Kj-P1. The second one is the largest plinian eruption in the whole volcano history, with a large umbrella plume producing a wide-spread tephra at more than 500 km from the source and an intraplinian pyroclastic flow (Kj-S).

著者

藤田 浩司 岩前 篤 佐藤 寛 高原 梨沙子 鈴木 曜

出版者

日本建築学会

雑誌

日本建築学会環境系論文集 (ISSN:13480685)

巻号頁・発行日

vol.85, no.768, pp.159-167, 2020 (Released:2020-02-28)

参考文献数

18

被引用文献数

2

---

The high cost of improving thermal insulation performance in houses is one of the hindrances to the spread of the improvement in thermal insulation performance, and it takes a long time to recover these costs through reduction of heating and cooling costs alone. Under such circumstances, in recent years, it has been reported that improvement in thermal insulation performance reduces the likelihood of various diseases among people inhabiting these houses, and this reduces medical costs. However, the relationship between thermal insulation performance and medical costs has not been quantitatively evaluated. If medical costs in relation to the thermal insulation performance of a house can be evaluated quantitatively, they can be taken into consideration in the recovery period of the costs of the improvement of the thermal insulation performance. Furthermore, it is possible to examine the most economical thermal insulation performance when considering the costs for thermal insulation, heating and cooling costs, and medical costs together. Therefore, in this study, we estimated the medical costs in relation to the thermal insulation performance of the house, and examined the thermal insulation performance that is most economical when the costs for thermal insulation, heating and cooling costs, and medical costs are considered. Furthermore, we examined the cost recovery period for the improvement in the thermal insulation performance from that which satisfied the 2013 standard to the above-mentioned most economical thermal insulation performance, taking into consideration the reduction in heating and cooling costs and medical costs. We assumed that the onset of various diseases is not directly affected by the thermal insulation performance of the house, but is affected by the thermal environment in the house, which is formed according to the thermal insulation performance of the house and the heating and cooling method. On the basis of the relationships between insulation levels of various houses and improvement rates in various diseases shown in the previous research, we estimated the thermal environments in houses in correspondence to each level of insulation and estimated medical costs from improvement rates in various diseases. We proposed formulas to estimate the medical costs for heart diseases and vascular brain diseases from the mean daily minimum operative temperature of the house from February 1 to February 7 and formulas to estimate the medical costs for diseases, excluding heart diseases and vascular brain diseases, from the mean operative temperature of the rooms the family inhabits from January 1 to February 28. We proposed these formulas separately for the age groups 0 to 19, 20 to 39, 40 to 59, and 60 and older. Furthermore, using these formulas, we examined the most economical insulation performance, including insulation costs, heating and cooling costs, and medical costs. The average heat transmission coefficient of the envelope (UA value) of a house having this most economical insulation performance is 0.4 to 0.5 W/m2K for a floor-insulation house, and 0.36 to 0.4 W/m2K for a foundation-insulation house. We found that by considering not only heating and cooling costs but also medical costs, the cost recovery period for the improvement in the thermal insulation performance from that which satisfied the 2013 standard to the above-mentioned most economical thermal insulation performance was significantly shortened, to around ten years.

著者

及川 輝樹 中野 俊 荒井 健一 中村 圭裕 藤田 浩司 成毛 志乃 岸本 博志 千葉 達朗 南里 翔平

雑誌

日本地球惑星科学連合2018年大会

巻号頁・発行日

2018-03-14

---

飛騨山脈南部の岐阜県・長野県県境に位置する乗鞍火山の最近約1万年間の噴火史を,テフラ層序とAMS 14C年代測定を基に明らかにした.なお本報告は,乗鞍岳火山防災協議会が行った調査を基にして,その後検討を加えたものである.かつて乗鞍火山における最近1万年間の活動中心は,火口縁に最高峰の剣ヶ峰(3026m)がある権現池火口の他,恵比須岳火口にもあるとされていた.しかし,恵比須岳火口起源のテフラとされていた噴出物は,年代や記載岩石学的特徴から,その火口起源のものではないことが明らかとなった.そのため,最近1万年間の活動中心は権現池火口周辺に限られる.最近1万年間における乗鞍火山の噴火活動は,テフラ層序に基づくと,少なくともマグマ噴火を2回,水蒸気噴火を10回行っている.マグマ噴火は,いずれも水蒸気噴火に始まるが,その後火山灰を放出する噴火とスコリアを放出する噴火がそれぞれ発生した.スコリアを放出する噴火は,その初期に小規模な火砕流も発生した.総テフラ噴出量は数100~1000万/m3オーダである.なお,権現池火口周辺から流れ出た溶岩のうち,保存のよい微地形が残存する溶岩も3ユニットあることから,溶岩を流す噴火も完新世に3回発生した可能性がある.また,個々の水蒸気噴火の総噴出量は,数10~数100万m3オーダとなる.最新の噴火は,約500年前に発生した水蒸気噴火である.およそ7300年前に降下した鬼界アカホヤ火山灰より上位のテフラユニットの数から算出した噴火頻度は,800年に一回となる.近隣の焼岳火山(100~300年/回)と比べると噴火頻度は少ないが,桁違いに少ないわけではない.

著者

工藤 玄恵 藤田 浩司 ニヤゼ マデニヤテ 松山 永久

出版者

東京医科大学医学会

雑誌

東京醫科大學雜誌 = THE JOURNAL OF TOKYO MEDICAL UNIVERSITY (ISSN:00408905)

巻号頁・発行日

vol.65, no.1, pp.29-36, 2007-01-25

参考文献数

34

被引用文献数

2

著者

千葉 達朗 林 信太郎 小野田 敏 栗原 和弘 藤田 浩司 星野 実 浅井 健一

出版者

日本地質学会

雑誌

地質學雜誌 (ISSN:00167630)

巻号頁・発行日

vol.103, no.6, pp.XXI-XXII, 1997-06-15

被引用文献数

4 1

---

5月11日午前8時, 秋田県鹿角市の澄川温泉で, 地すべりと石流が発生, 澄川温泉と赤川温泉の16棟が全壊, 国道341号も寸断された. 5月4日頃から水の濁りや道路の変状等が察知され, 適切な警戒避難が行われたため, この災害による死者・負傷者はなかった. なお, 地すべりの最中に末端付近で水蒸気爆発が発生した. ここでは, 5月12日にアジア航測(株)が撮影した空中写真, その後の現地の他, 秋田航空(株)が撮影した水蒸気爆発の瞬間の写真を紹介する.

著者

山崎 家春 藤田 浩司 峯尾 松一郎 石川 章夫 早川 和志 工藤 玄恵

出版者

特定非営利活動法人日本臨床細胞学会

雑誌

日本臨床細胞学会雑誌 (ISSN:03871193)

巻号頁・発行日

vol.47, no.2, 2008-09-22

著者

宇井 忠英 井田 喜明 鎌田 浩毅 林信 太郎 川邊 禎久 加藤 幸弘 千葉 達朗 藤田 浩司 塩谷 みき

出版者

特定非営利活動法人 日本火山学会

雑誌

日本火山学会講演予稿集 (ISSN:24335320)

巻号頁・発行日

vol.2002, 2002

著者

藤田 浩司 松岡 聡 岩前 篤 太田 周彰

出版者

一般社団法人 日本建築学会

雑誌

日本建築学会技術報告集 (ISSN:13419463)

巻号頁・発行日

vol.25, no.60, pp.753-758, 2019-06-20 (Released:2019-06-20)

参考文献数

7

---

KINDAI University and various enterprises proposed a Zero-Energy-House(ZEH) called “ENEMANE R HOUSE” in ENEMANE HOUSE 2017. A real size house was built in Osaka and its environmental performance was measured in November 2017. This report presents the energy-saving and environmental technology adopted in this house and its effects. The findings show that this house achieved a ZEH status sufficiently and has excellent environmental performance.

著者

藤縄 明彦 藤田 浩司 高橋 美保子 梅田 浩司 林 信太郎

出版者

特定非営利活動法人 日本火山学会

雑誌

火山 (ISSN:04534360)

巻号頁・発行日

vol.46, no.5, pp.269-284, 2001-11-20 (Released:2017-03-20)

参考文献数

24

被引用文献数

3

---

Kurikoma volcano is located at the volcanic front of northeastern Japan arc. The volcano can be divided into 6 volcanic edifices on the bases of the inferred eruption centers, relative preservation of primary micro-topographic features on the eruptive materials, and stratigraphic relations. Lava flow has been dominant through the development history of each edifice, while pyroclastic deposits are conspicuous near the craters of several ones. Newly analyzed 7 K-Ar ages for the representative samples range from ca. 0.53 to around 0.11 Ma, practically reconcilable with the stratigraphy. Based on these data, an internally consistent scenario on the development history is summarized as follows: 1) Magmatic eruption started at about 0.5 Ma to make up the southern volcanic row. South and east to northeast flank of the Higashi-Kurikoma volcanic edifice was probably formed nearly the same time. Following these eruptions from the southern vents, central vents effused lava flows, resulting to build the Higashi-Kurikoma edifice and Kokuzou lavas (part of Kurikoma edifice) around 0.4 Ma. 2) After terminating eruption from the southern and east-north eastern vents, the Higashi-Kurikoma vent had been active until 0.1 Ma, and Kurikoma vent lasted several tens of thousands years ago. 3) Magusadake cone was built through repeated lava effusions from several vents in the western part of the volcano from 0.45 Ma to 0.1 Ma. 4) Viscous magma erupted to form Tsurugidake lava dome as the last event of magmatic eruption so far in the Sukawa horse-shoe shaped crater which was formed in northern portion of the Kurikoma (Okomayama) volcanic edifice.

著者

林信 太郎 谷口 宏充 千葉 達朗 伊藤 英之 大口 健志 長谷中 利昭 大場 司 藤田 浩司 根本 靖彦

出版者

特定非営利活動法人日本火山学会

雑誌

日本火山学会講演予稿集

巻号頁・発行日

vol.1997, no.2, 1997-09-21

被引用文献数

1