Classifying Water Quality of Wando and Tamari According to the Characterization of H2O Stable Isotope and Ionized Type in the Middle and Lower Kiso River*
DOI:
https://doi.org/10.5614/j.eng.technol.sci.2015.47.2.7Abstract
Wando and tamari are water bodies in the floodplain of a river and play an important role in maintaining valuable ecosystems. There are over 100 wando and tamari in the middle and lower basin of the Kiso River. An Acheilognathus longipinnis, Itasenpara Bitterling, which is designated as an endangered species, has been identified in these areas. The habitat of these valuable wando and tamari species is endangered by the development of large land plants around these reservoirs caused by river dredging for flood protection. Therefore, it is essential to collect detailed data about the habitat, hydraulic water flow, physical structures and landscape in order to preserve this species, but so far little attention has been given to water quality. The purpose of our research was to classify the water quality of wando and tamari water, especially ions, and to determine the water type based on its origin. Samples were collected at 10 wando sites and 15 tamari sites from August 2011 to February 2013 along the Kiso River. As our analysis by trilinear diagram shows, the waters of wando and tamari almost all belong to the category of Type I (Ca-HCO3), which forms in shallow aquifers. The two reservoirs that do not belong to Type I are presumably contaminated by drainage water from human activities.Downloads
References
Tockner, K., Schiemer F., Baumgartner C., Kum G., Weigand E., Zweimuller I. & Ward J. V., The Danube Restoration Project: Species Diversity Patterns Across Connectivity Gradients in the Floodplain System, Regulated Rivers, 15, pp. 245-258, 1999. (Journal)
PWRI, Heisei 21 Nendo Kishousei Nimaigai To Gyorui Wo Moderutoshita Hanrangen No Seitaikei Rekkakikou No Kaimei To Shizennsaisei Ni Kannsuru Kinnkyuuseihyouka Houkokusho, pp.
-13, 2010. (Report in Japanese)
Mori, S., Wada, Y., Kawachi, T. & Andoh, S., Noubiheiya Niokeru Itasenpara No Genjou-Kankyouchou No Itakuchousa Kara-Kankyouhozenngaku No Riron To Jissen., Shinsannsha Saitekku, pp. 83-104, 2000. (Book in Japanese)
Sagawa, S., Kayaba, Y., Kume, M. & Mori, S., Comprehension of Floodplain in The Kiso River and Its Restoration Project, Civil Engineering Journal, 53, pp. 6-9, 2011. (Journal in Japanese)
PWRI, Heisei 22 Nendo Kishousei Nimaigai To Gyorui Wo Moderutoshita Hanrangen No Seitaikei Rekkakikou No Kaimei To Shizennsaisei Ni Kannsuru Kinnkyuuseihyouka Houkokusho, pp. 4-18, 2011. (Report in Japanese)
Negishi, J., Kayaba, Y. & Sagawa, S., Ecological Consequences of Changing Riverscape: Terrestrialization of Floodplain and Freshwater Mussels, Civil Engineering Journal, 50, pp.38-41, 2008. (Journal in Japanese)
Kohzu, A., Kawaguchi, Y., Nunokawa, M. & Nakamura, F., Estimation of Stream Ecosystems by 13C and 15N Natural Abundances, Ecol. Civil Eng., 7(2), pp. 201-213, 2005. (Journal in Japanese)
Matsumoto, Y., Sagawa, S., Inoue, T., Yokota, K. & Nakamura, T., Spatial and Temporal Variations of Dissolved Organic Carbon of Wando and Tamari in The Middle and Lower Kiso River, Limnology in Tokai Region of Japan, 55, pp. 7-14, 2013. (Journal in Japanese)
Tawa, A., Hasegawa, Y. & Ookawara, A., Geochemical Approach to The Flow of Groundwater in Landslide Area, Journal of Japan Landslide Society, 36, pp. 1-10, 2000. (Journal in Japanese)
Abudoureyimu, B., Kido, Y., Awadsu, S. & Nakakita, E., Analysis of Spatial and Temporal Distribution Characteristics of Groundwater Quality in Kyoto Basin, Annuals of Disas. Prev. Res. Inst., Kyoto Univ., 53 B, pp. 483-494, 2010 (Report in Japanese)