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Volume 2 (1989)
- Issue 4 Pages 237-
- Issue 3 Pages 177-
- Issue 2 Pages 79-
- Issue 1 Pages 1-
Volume 2, Issue 4
Displaying 1-8 of 8 articles from this issue
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[in Japanese], [in Japanese], [in Japanese]1989 Volume 2 Issue 4 Pages 237-249
Published: October 31, 1989
Released on J-STAGE: June 28, 2010
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Yoshitsugu KANEMOTO, Ryohei NAKAMURA, Norihiko YAZAWA1989 Volume 2 Issue 4 Pages 251-266
Published: October 31, 1989
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe hedonic approach is one of the most promising methods of estimating the value of environmental quality. The purpose of this paper is to provide an outline of the approach for applied researchers who are interested in measuring the value of environmental quality. In addition to reviewing recent research on the hedonic approach, we explain how the approach can be implemented and how the estimation results must be interpreted.View full abstractDownload PDF (2485K) -
Masako TABATA, Akimitsu BABA, Masahiro NENOI, Shin YAMASHITA, Junzo SU ...1989 Volume 2 Issue 4 Pages 267-274
Published: October 31, 1989
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSTo evaluate the biological activity of river sediments, we attempted to measure activities of enzymes in the sediments. The activities of amylase, cellulase, urease and phosphatase contained in Tama River sediments were measured using a simple method. This method was not influenced by pollutants in the sediment and reflected the activities of enzymes in the sediment. Sediment enzyme activity was closely related to the amounts of total organic carbon, total nitrogen, total phosphorus and respiration rate, and appeared to reflect microbial decomposition activity of organic substances in the sediments . In addition, protective effects of the sediment against the enzyme inhibitors were investigated.View full abstractDownload PDF (794K) -
Nobuhisa WATANABE, Shin-ichi SAKAI, Hiroshi TAKATSUKI1989 Volume 2 Issue 4 Pages 275-286
Published: October 31, 1989
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSAn environmental behavior model of tributyltin (TBT) was established and applied to calculation to estimate the environmental behaviors of TBT used as antifouling paints. The evaluative environment consists of three compartments; surface microlayer, water and sediment, which are assuumed of a closed aquatic environment. The environmental behavior was characterized mainly by the input to the system, the transportation between compartments and the degradation in each compartment. The simultaneous differential equations were calculated by usig the estimated parameters. It should be, noted that TBT may be accumulated in the sediment slowly. The surface microlayer seems to be a considerable degradation sink. The distribution and the fate of TBT under the steady state may be affected by the mode of TBT input. The estimated parameters and values were compared with data reported previously to confirm the utility of the present model.View full abstractDownload PDF (1393K) -
-Case Study in Kawasaki City-Sachihiko HARASHINA, Takuma IKEDA, Hiroya ONO1989 Volume 2 Issue 4 Pages 287-300
Published: October 31, 1989
Released on J-STAGE: March 01, 2011
JOURNAL FREE ACCESSRecently, people in Japan have become interested in restoring river environments. This is not an easy task because necessary flood control measures often destroy natural environments and result in poor water quality. The present paper takes the position that if citizens recognize the threats of flooding and poor water quality, they may voluntarily act to preserve the river environment by (1) personally protecting against flooding, and (2) not releasing polluted water into the river. We report the result of personally-administered questionnaire of 309 residents who live along the Nikaryou-Yousui and Hirasegawa rivers in Kawasaki city. Findings suggest that (1) most residents like improvements in river environments in stead of covering river with platforms, (2) residents who believe that their homes are at risk of flooding do take flood precautions, (3) residents who would like a better environment and who recognize that present water quality is poor tend to take action against water pollution, and (4) negative images of the river by some apathetic residents who do not want environmental inprovements are due to the quality of neighboring river environment, and not to a fear of flood damage.View full abstractDownload PDF (4741K) -
[in Japanese]1989 Volume 2 Issue 4 Pages 301-310
Published: October 31, 1989
Released on J-STAGE: March 01, 2011
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[in Japanese]1989 Volume 2 Issue 4 Pages 311-316
Published: October 31, 1989
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (996K) -
[in Japanese]1989 Volume 2 Issue 4 Pages 317-321
Published: October 31, 1989
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (464K)
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