The impact of warm water in upstream on water quality of headwaters reservoir

Ikuyo Makino, Yuji Yahagi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

As remarkable geographic reasons, most of rivers in Japan form short distance and steep difference of altitude. In additions, the mountainous area is covered by headwater conservation forest to obtain fine quality water as well as suitable place for dam reservoirs. However, for these past 20 years, a water-bloom as the typical water pollution phenomena came to occur in the dam reservoir established to around 500m above sea level of the headwater conservation forest. We investigated the Nutrient salts and water temperatures of the rivers inletting to dam reservoir in Kanto mountain region. The temperatures of the sampling rivers water remarkably increased. In the present study, the effects of inletting river water temperature on the water quality of a reservoir located in Kanto mountain region are investigated by multivariate analysis. As the results, (1) In three decades from 1982 to 2011, feeder rivers water temperature increased. The highest affecting matter is Chlorophyll a which is an index of water-blooms. The Chlorophyll a gradually increased and the water quality deteriorated. The increased water temperature is a primary factor for the water pollution of the reservoir. (2) The selective intake system to control the water temperature of the downstream river started in 1992 is an additional factor to deteriorate the reservoir water quality. It became a trigger to decrease the mid layer water temperature in the reservoir.

Original languageEnglish
Title of host publicationProceedings of the 10th Global Congress on ICM: Lessons Learned to Address New Challenges, EMECS 2013 - MEDCOAST 2013 Joint Conference
PublisherMiddle East Technical University
Pages1001-1012
Number of pages12
Volume2
Publication statusPublished - 2013
Event10th Global Congress on ICM: Lessons Learned to Address New Challenges, EMECS 2013 - MEDCOAST 2013 Joint Conference - Marmaris
Duration: 2013 Oct 302013 Nov 3

Other

Other10th Global Congress on ICM: Lessons Learned to Address New Challenges, EMECS 2013 - MEDCOAST 2013 Joint Conference
CityMarmaris
Period13/10/3013/11/3

Fingerprint

warm water
headwater
water temperature
water quality
water
river water
river
dam
mountain region
water pollution
chlorophyll a
algal bloom
multivariate analysis
conservation
sea level
salt
nutrient
sampling
Japan
temperature

ASJC Scopus subject areas

  • Geography, Planning and Development

Cite this

Makino, I., & Yahagi, Y. (2013). The impact of warm water in upstream on water quality of headwaters reservoir. In Proceedings of the 10th Global Congress on ICM: Lessons Learned to Address New Challenges, EMECS 2013 - MEDCOAST 2013 Joint Conference (Vol. 2, pp. 1001-1012). Middle East Technical University.

The impact of warm water in upstream on water quality of headwaters reservoir. / Makino, Ikuyo; Yahagi, Yuji.

Proceedings of the 10th Global Congress on ICM: Lessons Learned to Address New Challenges, EMECS 2013 - MEDCOAST 2013 Joint Conference. Vol. 2 Middle East Technical University, 2013. p. 1001-1012.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Makino, I & Yahagi, Y 2013, The impact of warm water in upstream on water quality of headwaters reservoir. in Proceedings of the 10th Global Congress on ICM: Lessons Learned to Address New Challenges, EMECS 2013 - MEDCOAST 2013 Joint Conference. vol. 2, Middle East Technical University, pp. 1001-1012, 10th Global Congress on ICM: Lessons Learned to Address New Challenges, EMECS 2013 - MEDCOAST 2013 Joint Conference, Marmaris, 13/10/30.
Makino I, Yahagi Y. The impact of warm water in upstream on water quality of headwaters reservoir. In Proceedings of the 10th Global Congress on ICM: Lessons Learned to Address New Challenges, EMECS 2013 - MEDCOAST 2013 Joint Conference. Vol. 2. Middle East Technical University. 2013. p. 1001-1012
Makino, Ikuyo ; Yahagi, Yuji. / The impact of warm water in upstream on water quality of headwaters reservoir. Proceedings of the 10th Global Congress on ICM: Lessons Learned to Address New Challenges, EMECS 2013 - MEDCOAST 2013 Joint Conference. Vol. 2 Middle East Technical University, 2013. pp. 1001-1012
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