京都大学防災研究所年報第56号(平成24年度)

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1 京都大学防災研究所年報第 56 号 B 平成 25 年 6 月 Annuals of Disas. Prev. Res. Inst., Kyoto Univ., No. 56 B, 203 Upgrading the Integrated Hydrological Model for the Kiso River System (II) Yoshinobu SATO, Motohiro HONMA and Yasushi SUZUKI Synopsis In the Kiso river system, the river flow is controlled by the many multi-purpose reservoirs operation located in the upstream of the basin. In order to simulate river flow more realistically, we upgraded our distributed hydrological model by considering actual reservoirs operation and water withdrawal from the river channel. The results indicate that our new model shows better performance than the previous one. Then, to mitigate the damages of the severe drought disasters, we tried several adaptation options by numerical simulations such as the change of the reservoir operation rules and inter basin water transfer. The results obtained in this study will contribute as an adaptation measures for the better water resources management. Keywords: Kiso river system, distributed hydrological model, reservoir operation, adaptation 5275km 2 985km 2 840km 2 9km 2 800km 2 Fig. 545

2 Tokuyama Chusetsu Mangoku Iwaya Inuyama Imawatari Magai(naruto) Misogawa Makio Agigawa Fig. Channel network, major dam and reference point in the Kiso River System. (:Dam;: Reference point) Kojiri2006 km (Hydro-BEAM: Hydrological River Basin Environment Assessment Model) Fig.7 SVAT(Soil-Vegetation-Atmosphere Transfer)Sato et al, [] m 3 /s 400m 3 /s300m 3 /s 20m 3 /s50m 3 /s500m 3 /s 200m 3 /s 200m 3 /s m m m m m m m 3 [2] 4 546

3 7800m m 3 4.0m 3 /s 3m 3.2m 3 /s.4m 3 /s 20m 3 /s 4/ /302.3m 3 /s2/3/3 0.7m 3 /s 6/6 /52960m 3 a6800m m 3 /s 30.55m 3 /s bm 3 9.9m 3 /s 2.584m 3 /s 6.58m 3 /s 39.93m 3 /s c2200m m 3 0.8m 3 /s 3.2m 3 /s d6800m m 3 0.3m 3 /s.098m 3 /s 2.902m 3 /s 40m 3 /s [3] am 3 /s bm 3 /s50m 3 /s cm 3 /s50m 3 /s dm 3 /s50m 3 /s [4] 993Fig.2 Fig.3 2 V /2/3 6/ /56/6/ H-V 547

4 maruyama makio iwaya agigawa misogawa yokoyama tokuyama Fig. 2 Daily averaged observed water storage level (m) of each dam in the Kiso river system. [5] a 3 548

5 Maruyama / 2/ 3/ 4/ 5/ 6/ 7/ 8/ 9/ / Makio / 2/ Iwaya / 2/ 3/ 4/ 5/ 6/ 7/ 8/ 9/ Agigawa / / 2/ / 2/ 3/ 4/ 5/ 6/ 7/ 8/ 9/ / Misogawa / 2/ / 2/ 3/ 4/ 5/ 6/ 7/ 8/ 9/ / Yokoyama / 2/ / 2/ 3/ 4/ 5/ 6/ 7/ 8/ 9/ / Tokuyama / 2/ / 2/ 3/ 4/ 5/ 6/ 7/ 8/ 9/ / / 2/ / 2/ 3/ 4/ 5/ 6/ 7/ 8/ 9/ / / 2/ Fig. 3 Change of observed water storage level and simplified reservoir operation rule curve (m) of each dam in the Kiso river system m 3 /s 50 m 3 /s m 3 /s.677 m 3 /s 200 m 3 /s 5/~9/30 m 3 /s50 m 3 /s.642 m 3 /s 3.62 m 3 /s 200m 3 /s5/~/ m 3 /s m 3 /s50 m 3 /s m 3 /s 4.4 m 3 /s 200 m 3 /s 5/~9/30 50 m 3 /s m 3 /s50 m 3 /s 2.44 m 3 /s 9.9 m 3 /s 50 m 3 /s 55 m 3 /s 5/~9/ m 3 /s m 3 /s m 3 /s 549

6 Fig. 4 Monthly amount of actual water intake from river channel of the Kiso river basin at each water intake point. 50 m 3 /s 0.4 m 3 /s0.65 m 3 /s 0.38 m 3 /s3.3 m 3 /s [6] 550

7 Fig. 5 Monthly amount of water intake pattern from river channel of the Kiso river basin at each water intake point. Fig m 3 /s 55

8 Fig.5Fig.4 Fig m 3 /s3.94m 3 /s 7.56m 3 /s 65384m 3.94m 3 /s m 3 93% 56.3m m 3 50m 3 /s / 2.9m 3 /2079.9m 3 2.9m % 6(994) m 3 /s2.0m 3 /s.0m 3 /s [] [2] Fig Qobs Qcal(old) Qcal(new) Fig.6 552

9 Fig Fig m 3 /s m 3 /s m 3 /s 265. m 3 /s m 3 /s m 3 /s 2.7 m 3 /s 24.3 m 3 /s m 3 /s. m 3 /s 2.4 m 3 /s 2.4 m 3 /s 79. m 3 /s 87.3 m 3 /s 87.3 m 3 /s [] Fig m822m 3 207m 3 ( 4800m 3 /s) m 3 /s 6 [2] Fig m 880m879m 6800m 3 2/5 3/3832m 837m 5/-m 879m7/3 8/3862m/4 -m879m 553

10 Fig. 6 Daily average river discharge at each reference point in the Kiso river system. ( ) 554

11 Fig. 6 Daily average river discharge at each reference point in the Kiso river system. ( ) 555

12 Fig. 6 Daily average river discharge at each reference point in the Kiso river system. ( ) 556

13 Imawatari Chusetsu Qobs Qcal(new) Qcal(old) Qobs Qcal(new) Qcal(old) Inuyama Mangoku Qobs Qcal(new) Qcal(old) Qobs Qcal(new) Qcal(old) Magai Qobs Qcal(new) Qcal(old) Fig. 7 Flow duration curve at each reference point in the Kiso river system. ( ) [3] Fig m 3 m4m4m m 3 38m 3 690m 3 V 2/203/3 500m 3 377m 5/20-m4m

14 Fig. 8 Performance of the reservoir operation model for Maruyama Dam. ( Observed, Calculated) Unit: m 3 Fig. 9 Performance of the reservoir operation model for Makio Dam. ( Observed, Calculated) Unit: m 3 Fig. Performance of the reservoir operation model for Iwaya Dam. ( Observed, Calculated) Unit: m 3 [4] 2 Fig. 6//5 600m 3 (400.5m) (42m) 558

15 Fig. Performance of the reservoir operation model for Agigawa Dam. ( Observed, Calculated) Unit: m 3 Fig. 2 Performance of the reservoir operation model for Misogawa Dam. ( Observed, Calculated) Unit: m 3 Fig. 3 Performance of the reservoir operation model for Yokoyama Dam. ( Observed, Calculated) Unit: m m 3 /s

16 Fig.995 [5] Fig / /5(200m 3 ) (22.5)2 200m m 3 3m [6] Fig m 3 /s [7] Fig.4 6/6 /52008 Fig. 4 Performance of the reservoir operation model for Tokuyama Dam. ( Observed, Calculated) Unit: m 3 560

17 SIM-.5m 3 /s SIM-2 50m 3 /s4.0m 3 /s 40m 3 /s5.3m 3 /s SIM-32.0m 3 /s SIM-4 SIM-5 SIM-6990 SIM m 3 / 4.0m 3 /s 40m 3 / 5.3m 3 /s 4.7m 3 /s [] Fig m 3 /s m 3 /s m 3 /s m 3 /s 40m 3 /s 50m 3 /s /s 343 (a) (b) (c) Observed SIM- SIM-2 SIM-3 SIM-4 SIM Observed SIM- SIM-2 SIM-3 SIM-4 SIM-5 Fig. 5 Influence of additional water supply for drought mitigation. ( ) (a) Inuyama (Drought), (b) Magai (Severe drought), (c) Magai (Drought) Observed SIM- SIM-2 SIM-3 SIM-4 SIM-5 56

18 SIM-6 990// 990/3/ 990/5/ 990/7/ 990/9/ 990// 99// 99/3/ 99/5/ 99/7/ 99/9/ 99// SIM-6 992// 992/3/ 992/5/ 992/7/ 992/9/ 992// 993// 993/3/ 993/5/ 993/7/ 993/9/ 993// SIM-6 994// 994/3/ 994/5/ 994/7/ 994/9/ 994// 995// 995/3/ 995/5/ 995/7/ 995/9/ 995// SIM-6 996// 996/3/ 996/5/ 996/7/ 996/9/ 996// 997// 997/3/ 997/5/ 997/7/ 997/9/ 997// SIM-6 998// 998/3/ 998/5/ 998/7/ 998/9/ 998// 999// 999/3/ 999/5/ 999/7/ 999/9/ 999// Fig. 6 Influence of additional water supply for drought mitigation at Inuyama. ( ) 562

19 SIM-6 990// 990/3/ 990/5/ 990/7/ 990/9/ 990// 99// 99/3/ 99/5/ 99/7/ 99/9/ 99// SIM-6 992// 992/3/ 992/5/ 992/7/ 992/9/ 992// 993// 993/3/ 993/5/ 993/7/ 993/9/ 993// SIM-6 994// 994/3/ 994/5/ 994/7/ 994/9/ 994// 995// 995/3/ 995/5/ 995/7/ 995/9/ 995// SIM-6 996// 996/3/ 996/5/ 996/7/ 996/9/ 996// 997// 997/3/ 997/5/ 997/7/ 997/9/ 997// SIM-6 998// 998/3/ 998/5/ 998/7/ 998/9/ 998// 999// 999/3/ 999/5/ 999/7/ 999/9/ 999// Fig. 7 Influence of additional water supply for drought mitigation at Magai. ( ) 563

20 SIM-7 990// 990/3/ 990/5/ 990/7/ 990/9/ 990// 99// 99/3/ 99/5/ 99/7/ 99/9/ 99// SIM-7 992// 992/3/ 992/5/ 992/7/ 992/9/ 992// 993// 993/3/ 993/5/ 993/7/ 993/9/ 993// SIM-7 994// 994/3/ 994/5/ 994/7/ 994/9/ 994// 995// 995/3/ 995/5/ 995/7/ 995/9/ 995// SIM-7 996// 996/3/ 996/5/ 996/7/ 996/9/ 996// 997// 997/3/ 997/5/ 997/7/ 997/9/ 997// SIM-7 998// 998/3/ 998/5/ 998/7/ 998/9/ 998// 999// 999/3/ 999/5/ 999/7/ 999/9/ 999// Fig. 8 Influence of additional water supply for drought mitigation at Magai. ( ) 564

21 SIM- 0.5m 3 /s 0.5m 3 /s SIM-2 m 3 /s3 40m 3 /s40 50m 3 /s23 SIM-3 40m 3 /s 50m 3 /s 2.0m 3 /ssim-2 SIM-4 SIM-3 SIM-2 40m 3 /s4850m 3 /s29 SIM-5 [2] Fig.6990 SIM m 3 /s SIM-7 Fig.7 50m 3 /s (6) (Fig.8) (40m 3 /s)

22 , 55B, pp Kojiri T. (2006): Hydrological River Basin Assessment Model (Hydro-BEAM), In Singh V.P. and Frevent D.K., "Watershed models", Taylor & Francis, CRC Press, Boca Raton, Florida, pp Sato Y., Ma X.Y., Xu J.Q., Matsuoka M., Zheng H.X., Liu C.M. and Fukushima Y. (2008): Analysis of long-term water balance in the source area of the Yellow River basin, Hydrological Processes Vol.22, pp

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