Latest Issue

Journal of Geography (Chigaku Zasshi), 2023 Vol.132 No.2

2023 Vol.132 No.2

A Well with a Hand Pump in Shinagawa Area, Central Tokyo

This well is located in an alluvial lowland area in the western coastal part of Tokyo Bay. In Shinagawa area, there still remain a number of wells with hand pumps, which were used as domestic water sources in the past. This well is 9.1 m deep and its screen width is unknown. The hand pump on this well is covered with an orange cloth because it is currently out of order.
 Although the public sewerage coverage ratio of Tokyo’s Shinagawa area is 99.5% (Bureau of Sewerage Tokyo Metropolitan Government1)), the results of an end member mixing analysis (EMMA) based on the δ15N-NO3 and nitrogen concentration suggest sewage is seeping into the groundwater sampled from this well. And its Cl concentration is higher than that of groundwater sampled in nearby areas. Meanwhile, other water quality results indicate a lower NO3 concentration (n.d. –5 mg/L), a higher HCO3 concentration (120–200 mg/L), and a lower ORPSHE (50–200 mV), despite seasonal variations, which are signs of denitrification under an anaerobic environment (Itoh et al., 2023).


(Photograph: Yuki ITOH; Explanation: Seongwon LEE)


Note

1) https://www.gesui.metro.tokyo.lg.jp/living/a2/spread/tasseinennzi/index.html [Cited 2023/1/28].

Reference

[Itoh, Y., Yasuhara, M., Lee, S., Nakamura, T. and Inamura, A. (2023): Groundwater contamination by nitrate ions in the highly urbanized Shinagawa area, central Tokyo, Japan. Journal of Geography (Chigaku Zasshi), 132, 141–160. (in Japanese with English abstract)]



Special Issue: Groundwater Pollution by Nitrate: Past, Present, and Future Perspectives

Overview of the Special Issue
 “Groundwater Pollution by Nitrate: Past, Present, and Future Perspectives”

Norio TASE, Masaru YAMANAKA, Seongwon LEE,
Takashi NAKAMURA and Yu TABAYASHI

Journal of Geography (Chigaku Zasshi), 2023, 132(2), 67.

DOI:10.5026/jgeography.132.67

Preface of the Special Issue on
 “Groundwater Pollution by Nitrate: Past, Present, and Future Perspectives”

Norio TASE, Masaru YAMANAKA, Seongwon LEE,
Takashi NAKAMURA and Yu TABAYASHI

Journal of Geography (Chigaku Zasshi), 2023, 132(2), 71.

DOI:10.5026/jgeography.132.71

Global Approaches to Address the Nitrogen Issue:
 Expected Effects on Groundwater Nitrate Pollution (Review Article)

Kentaro HAYASHI

Journal of Geography (Chigaku Zasshi), 2023, 132(2), 75.

DOI:10.5026/jgeography.132.75

Efforts of the Ministry of Environment
 to Address Groundwater Pollution by Nitrate Nitrogen (Review Article)

Tatemasa HIRATA

Journal of Geography (Chigaku Zasshi), 2023, 132(2), 93.

DOI:10.5026/jgeography.132.93

Groundwater Pollution by Nitrate Nitrogen and Livestock Waste Management
 (Review Article)

Kiyonori HAGA

Journal of Geography (Chigaku Zasshi), 2023, 132(2), 107.

DOI:10.5026/jgeography.132.107

Background, Controlling Factors and Characteristics
 of Groundwater Pollution by Nitrate Nitrogen at Alluvial Fans (Review Article)

Masaru YAMANAKA

Journal of Geography (Chigaku Zasshi), 2023, 132(2), 127.

DOI:10.5026/jgeography.132.127

Groundwater Contamination by Nitrate Ions
 in the Highly Urbanized Shinagawa Area, Central Tokyo, Japan (Original Article)

Yuki ITOH, Masaya YASUHARA, Seongwon LEE,
Takashi NAKAMURA and Akihiko INAMURA

Journal of Geography (Chigaku Zasshi), 2023, 132(2), 141.

DOI:10.5026/jgeography.132.141

Kumamoto City Measures to Reduce Nitrate Pollution:
 Example of New Efforts to Address Domestic Animal Waste Mainly
 from Dairy Farming and Meat Production (Short Article)

Tsutomu NAGATA, Michiko OTSUZUKI and Takayuki SATO

Journal of Geography (Chigaku Zasshi), 2023, 132(2), 161.

DOI:10.5026/jgeography.132.161

Nitrogen Discharge from Livestock Wastes Thrown in Unlined Pit
 and Denitrification around the Pit (Short Article)

Seongwon LEE and Norio TASE

Journal of Geography (Chigaku Zasshi), 2023, 132(2), 169.

DOI:10.5026/jgeography.132.169

Nitrogen Contamination and Denitrification Occurrence in Shallow Groundwater
 of Urbanized Area at Kathmandu Valley, Nepal (Original Article)

Takashi NAKAMURA, Ken’ichi OSAKA,
Saroj Kumar CHAPAGAIN and Kei NISHIDA

Journal of Geography (Chigaku Zasshi), 2023, 132(2), 183.

DOI:10.5026/jgeography.132.183