Takashi Nakamura
Biographic Data
| ID | 3826421 |
|---|---|
| NAME | Takashi Nakamura |
| GIVEN NAMES | Takashi |
| FAMILY NAME | Nakamura |
| SIGNATURE | NAKAMURA T |
| AFFILIATIONS | University of Yamanashi |
| ORCID | 0000-0001-9019-1426 |
| VERIFIED | Yes |
| TOTAL WORKS | 15 |
| TOTAL CITATIONS | 14 |
| AUTHOR COUNT | 15 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1964 |
| LATEST PUBLICATION YEAR | 2024 |
| H-INDEX | 1 |
Towards a combined human-natural system approach in the Northern Red Sea Region
Groundwater Contamination by Nitrate Ions in the Highly Urbanized Shinagawa Area, Central Tokyo, Japan
Shallow groundwater in the densely populated Shinagawa area (Kita-Shinagawa and Minami-Shinagawa), central Tokyo, was sampled from 10 shallow wells (less than 12 m deep) in February (cold dry season) and July (hot wet season) 2019. The concentrations in seven groundwater samples from Kita-Shinagawa in February and July were 1.6-34.1 mg/L and not detected −34.8 mg/L for NO3−, and 17.4-31.9 mg/L and 15.7-42.3 mg/L for Cl−. The measured isotopic rat…
Overview of the Special Issue “Groundwater Pollution by Nitrate
Preface of the Special Issue on “Groundwater Pollution by Nitrate
Nitrogen Contamination and Denitrification Occurrence in Shallow Groundwater of Urbanized Area at Kathmandu Valley, Nepal
ネパール・カトマンズ盆地における硝酸イオン(NO3−)およびアンモニウム(NH4+)による高濃度の地下水汚染について,窒素の起源とその分布の要因について調査を行なった。2009年と2010年の雨季(8月)に,丸井戸と掘り抜き井戸から計36の浅層地下水の試料を採取した結果,高濃度のNO3−(最大:63.9 mg/L)ならびにNH4+(最大:36.7 mg/L)が検出された。多くの丸井戸から採取した地下水については全溶存無機窒素に対するNO3−の含有量が多く,不飽和帯から流入するNO3−または酸素の供給により井戸内部で硝化が生じている可能性が示唆された。NO3−の窒素および酸素の安定同位体比(δ15Nとδ18O)の観測の結果,浅層地下水の主要な窒素汚染源は下水の漏水による窒素負荷であることが示された。また,NO3−濃度の減少に伴うNO3−-δ15N値の指数関数的な増加がみられたことや,δ18O値とδ15N値の間に得られる相関の近似式の傾きがおよそ0.5を示したことから,浅層地下水中において脱…
Origin of a Temporary Pond, Akaike, at the Northern Foot of Mount Fuji, Japan, July 2020
Akaike is a small, temporary pond located about 1 km east of Lake Shoji at the northern foot of Mt. Fuji, which appears following heavy rainfall events. It is widely accepted that the pond is connected to Lake Shoji by groundwater. However, this connection has not yet been evaluated because of a lack of scientific data including water quality and environmental isotopes from both Akaike Pond and Lake Shoji. Major dissolved ion and trace element co…
Water Sources of Lake Bottom Springs in Lake Kawaguchi, Northern Foot of Mount Fuji, Japan
Lake bottom springs play an important role in maintaining water quality in the Fuji Five Lakes. However, the sources of these springs and the hydrological delivery mechanisms have yet to be identified. To determine the sources of spring water of Lake Kawaguchi, samples were collected directly from lake bottom springs, and oxygen and hydrogen stable isotope ratios were obtained, along with vanadium concentrations. Visual observations and water-qua…
Overview of the Special Issue “Groundwater in Mt. Fuji (Part 2)”
Preface for the Special Issue on “Groundwater in Mt. Fuji (Part 2)”
Rural drinking water issues in India’s drought-prone area
Obtaining sufficient drinking water with acceptable quality under circumstances of lack, such as droughts, is a challenge in drought-prone areas of India. This study examined rural drinking water availability issues during a recent drought (2012) through 22 focus group discussions (FGDs) in a drought-prone catchment of India. Also, a small chemical water quality study was undertaken to evaluate the suitability of water for drinking purpose based …
Health through the life
On the Stability of Church Attendance Patterns during a Time of Demographic Change
Alan S. Miller, Takashi Nakamura, On the Stability of Church Attendance Patterns during a Time of Demographic Change: 1965-1988, Journal for the Scientific Study of Religion, Vol. 35, No. 3 (Sep., 1996), pp. 275-284
Formosans of Japanese Nationality in Fukien
The inhabitants of Formosa which became a apanese colony as a result of the sino -Japanese War ( 1894 -1895 ) were allowed to become Japanese nationals on 8 May 1897 But for some ten ears the Government -General of Formosa was too oc -Cupied with paCifiCatiOn Of thiS new territory to take an accurate census This enabled non -Formosan chinese in Fukien to obtain illegally Japanese nationality which gave them exterritorial rights and ameans to elud…
Harry J. Benda, James K. Irikura and Koichi Kishi. Japanese Military Administration in Indonesia
The Contribution of the Koninklijk Instituut voor de Taal-, Land- en Volkenkunde to Southeast Asian Studies
On the Stability of Church Attendance Patterns during a Time of Demographic Change
Alan S. Miller, Takashi Nakamura, On the Stability of Church Attendance Patterns during a Time of Demographic Change: 1965-1988, Journal for the Scientific Study of Religion, Vol. 35, No. 3 (Sep., 1996), pp. 275-284
The Contribution of the Koninklijk Instituut voor de Taal-, Land- en Volkenkunde to Southeast Asian Studies
Harry J. Benda, James K. Irikura and Koichi Kishi. Japanese Military Administration in Indonesia
Formosans of Japanese Nationality in Fukien
The inhabitants of Formosa which became a apanese colony as a result of the sino -Japanese War ( 1894 -1895 ) were allowed to become Japanese nationals on 8 May 1897 But for some ten ears the Government -General of Formosa was too oc -Cupied with paCifiCatiOn Of thiS new territory to take an accurate census This enabled non -Formosan chinese in Fukien to obtain illegally Japanese nationality which gave them exterritorial rights and ameans to elud…
On the Stability of Church Attendance Patterns during a Time of Demographic Change
Alan S. Miller, Takashi Nakamura, On the Stability of Church Attendance Patterns during a Time of Demographic Change: 1965-1988, Journal for the Scientific Study of Religion, Vol. 35, No. 3 (Sep., 1996), pp. 275-284
Health through the life
Rural drinking water issues in India’s drought-prone area
Obtaining sufficient drinking water with acceptable quality under circumstances of lack, such as droughts, is a challenge in drought-prone areas of India. This study examined rural drinking water availability issues during a recent drought (2012) through 22 focus group discussions (FGDs) in a drought-prone catchment of India. Also, a small chemical water quality study was undertaken to evaluate the suitability of water for drinking purpose based …
Water Sources of Lake Bottom Springs in Lake Kawaguchi, Northern Foot of Mount Fuji, Japan
Lake bottom springs play an important role in maintaining water quality in the Fuji Five Lakes. However, the sources of these springs and the hydrological delivery mechanisms have yet to be identified. To determine the sources of spring water of Lake Kawaguchi, samples were collected directly from lake bottom springs, and oxygen and hydrogen stable isotope ratios were obtained, along with vanadium concentrations. Visual observations and water-qua…
Overview of the Special Issue “Groundwater in Mt. Fuji (Part 2)”
Preface for the Special Issue on “Groundwater in Mt. Fuji (Part 2)”
Origin of a Temporary Pond, Akaike, at the Northern Foot of Mount Fuji, Japan, July 2020
Akaike is a small, temporary pond located about 1 km east of Lake Shoji at the northern foot of Mt. Fuji, which appears following heavy rainfall events. It is widely accepted that the pond is connected to Lake Shoji by groundwater. However, this connection has not yet been evaluated because of a lack of scientific data including water quality and environmental isotopes from both Akaike Pond and Lake Shoji. Major dissolved ion and trace element co…
Groundwater Contamination by Nitrate Ions in the Highly Urbanized Shinagawa Area, Central Tokyo, Japan
Shallow groundwater in the densely populated Shinagawa area (Kita-Shinagawa and Minami-Shinagawa), central Tokyo, was sampled from 10 shallow wells (less than 12 m deep) in February (cold dry season) and July (hot wet season) 2019. The concentrations in seven groundwater samples from Kita-Shinagawa in February and July were 1.6-34.1 mg/L and not detected −34.8 mg/L for NO3−, and 17.4-31.9 mg/L and 15.7-42.3 mg/L for Cl−. The measured isotopic rat…
Overview of the Special Issue “Groundwater Pollution by Nitrate
Preface of the Special Issue on “Groundwater Pollution by Nitrate
Nitrogen Contamination and Denitrification Occurrence in Shallow Groundwater of Urbanized Area at Kathmandu Valley, Nepal
ネパール・カトマンズ盆地における硝酸イオン(NO3−)およびアンモニウム(NH4+)による高濃度の地下水汚染について,窒素の起源とその分布の要因について調査を行なった。2009年と2010年の雨季(8月)に,丸井戸と掘り抜き井戸から計36の浅層地下水の試料を採取した結果,高濃度のNO3−(最大:63.9 mg/L)ならびにNH4+(最大:36.7 mg/L)が検出された。多くの丸井戸から採取した地下水については全溶存無機窒素に対するNO3−の含有量が多く,不飽和帯から流入するNO3−または酸素の供給により井戸内部で硝化が生じている可能性が示唆された。NO3−の窒素および酸素の安定同位体比(δ15Nとδ18O)の観測の結果,浅層地下水の主要な窒素汚染源は下水の漏水による窒素負荷であることが示された。また,NO3−濃度の減少に伴うNO3−-δ15N値の指数関数的な増加がみられたことや,δ18O値とδ15N値の間に得られる相関の近似式の傾きがおよそ0.5を示したことから,浅層地下水中において脱…
Towards a combined human-natural system approach in the Northern Red Sea Region
Groundwater and Isotope Geochemistry (8 works) · Environmental Science (7 works) · Geography (7 works) · Geology (7 works) · Geology (7 works) · Groundwater (6 works) · Ecology (5 works) · Groundwater flow and contamination studies (4 works) · Hydrology (agriculture) (4 works) · Chemistry (3 works)