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27-1, 25 - 31 (2017)

Journal of Arid Land Studies

http://dx.doi.org/10.14976/jals.27.1_25

* Corresponding Author: irie.mitsuteru.p2@cc.miyazaki-u.ac.jp 889-2192 1-1 Tel: 0985-58-7341 Fax: 0985-58-7344

1)

2017 1 26 2017 4 7

－小特集原著論文－

「逼迫する乾燥地の水資源とその対策」

沙漠研究 27-1, 25-31 (2017)Journal of Arid Land Studieshttp://dx.doi.org/10.14976/jals.27.1_25

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642: 39-49. Basson G.R. (2009): Management of siltation in existing and new reservoirs.

General Report, the 23rd Congress of the International Commission on Large Dams, Int. Com. on Large Dams, Brasilia.

Ben Mammou A., Louati M. (2007): E’volution temporelle de l’envasement des retenues de barrages de Tunisie. Rev. Sci. de l’Eau, 20(2): 201–211 (in French).

International Commission on Large Dams (2009): Sedimentation and Sustainable Use of Reservoirs and River Systems. ICOLD bulletin, 53.

Irie M., Kawachi A., Tarhouni J. and Ghrabi A. (2011) : Development of sedimentation and characteristics of sediment on the reservoir in Tunisia. Annual Journal of Hydroscience and Hydraulic Engineering, 55: 163-168.

Irie M., Kawachi A., Tarhouni J., Ghrabi A., Isoda H. (2012 a): Sedimentation trend and behavior of turbid water in the reservoir. Journal of Arid Land Studies, 22(1): 91-94.

Irie M., Kashiwagi K., Ujiie K., Nsiri I., Buguerra S.,Tarhouni J. (2012b):

Feasibility of exploitation of the sediment in the reservoirs for the sustainability of surface water resource in Tunisia. Journal of Japan Society of Civil Engineering Ser. G,68(6): II41–II46.

Irie M., Kawachi A., Nsiri I. and Tarhouni J. (2013): Observation of floodwater behavior and sedimentation in the reservoir. Journal of Japan Society of Civil Engineering, Ser. B1, 69(4): 247-252.

Irie M., Han J., Kawachi A., Tarhouni J., Ksibi M., Kashiwagi K., Isoda H. (2014): In vitro testing and commercialization potential of extracted fulvic acid from dredged sediment from arid region reservoirs. Waste and Biomass Valorization, 5: 273-281, DOI 10.1007/s12649-013-9234-y.

Irie M. (2015): Issue of surface water resources and alternative solutions, Sustainable North African Society -Exploring Seeds and Resources for Innovation-, 139-147.

Mtibaa S., Belkhamsa N., Irie M., Ksibi M. (2016): Experimental study on the valorization of dredged sediment from reservoirs in Tunisia as soil amendment regulating metal uptake by crops. International Journal of Environmental Science and Development,7(10): 707-714

Shintake M., Irie M. (2015): Dam gate operation for turbid flood water venting in the reservoir in Tunisia. Journal of Arid Land Studies, 25(3), 149-152.

Yamagami Y., Kaku M., Asazaki K., Tashiro Y., Yamashita T., Nishida K., Oshikawa J., Nonaka K., Kodama H., Sugio S. (2012): Approaches for Integrated Sediment Flow Management at Dams In the Mimikawa River Basin. Proceedings of the ICOLD Kyoto, pp.108-113.

Sedimentation in Water Reservoirs in Arid Region Mitsuteru IRIE *1)

Abstract: Securing stable water resource is most important issue in arid region under the extension of desertification caused by the globalclimate change. However, the available amount of surface water resource has been gradually reducing while the constructions of the reservoirs continued from 1950s’. Low vegetation of catchment area causes the severe soil erosion by eventual rainfall and suspended solid transported by stream flow is settled in the reservoirs. This sediment accumulation in reservoirs reduces available surface water resources. Currently 97% of suitable site for dam construction in our study site, Tunisia, has already been developed or planed, so that the alternative water resource covering the lost by sedimentation cannot be expected. There is no other way than managing the existing reservoirs. However, dredging, simplest countermeasure against sedimentation in reservoirs has not been carried out because it is quite costly for Tunisia. On the other hand, Tunisia has the problem of groundwater contamination with fluoride. Adequate concentration of fluoride gives reduction of tooth decay, but the higher concentration than 2 ppm causes dental and skeletal fluorosis. Some towns and villages e.g. vicinities of Kairouan, Beja, Gabes are suffering from this water-related disease. The author and the colleagues writing the following papers study about the management of sedimentation in reservoirs and processing clayey sediment to functional ceramics for water treatment includingeconomical point of view. Lives of the reservoirs are extended by the excavation of the sediment. Create the new industry based on the use of waste (sediment) from surface water resource. New environmental material contributes improvement of quality of drinking water for villagers. The area suffering from fluoride contamination is not only in Tunisia, spreading all over the world. The expected products will also contribute improvement of other African countries under such water quality situation.

Key Words: Density current, Dredging, Recycle, Reservoir, Sedimentation.

* Corresponding Author: irie.mitsuteru.p2@cc.miyazaki-u.ac.jp Miyazaki, 1-1, Gakuen-Kibanadai-Nishi, Miyazaki 889-2192, Japan Tel: +81-985-58-7341 Fax: +81-985-58-7344 1) Faculty of Engineering, University of Miyazaki

Received, January 26th, 2017; Accepted, April 7th, 2017

－ Original Article of Special Reports －

Impending Issues on Water Resource in Arid Region and Countermeasures

沙漠研究 27-1, 25-31 (2017)Journal of Arid Land Studieshttp://dx.doi.org/10.14976/jals.27.1_25