(Bulletin of FFPRI), Vol.5, No.1 (No.398), , Mar 研究資料 (Research material) 釜淵森林理水試験地観測報告 1 2 号沢試験流域 (1994 年 1 月 ~2000 年 12 月 ) 1) * 2) Hydr

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1 (Bulletin of FFPRI), Vol.5, No. (No.398), 99-8, Mar 研究資料 (Research material) 釜淵森林理水試験地観測報告 2 号沢試験流域 (994 年月 ~2000 年 2 月 ) ) * 2) Hydrological observation reports of the Kamabuchi experimental watershed - and experimental watersheds- (January 994 to December 2000) HOSODA Ikuhiro ) * and MURAKAMI Wataru 2) Abstract This report publishes the observation data of s and s from January 994 to December 2000 in the Kamabuchi and experimental watersheds (about N, 40 5 E). Precipitations were observed using a tipping-bucket rain gauge in the northeast side of the Yamagata experimental station office building, where it part about km southeastward from the experimental watershed, until the observation system at the meteorological station near the office building was rebuilt in late April 998. In comparison with the data without calibration, it was observed that the station s from April to November, which primarily consist of rain, were approximately % greater than the s, while the station s from December to March, which primarily consist of snow, were approximately 7% smaller than the s. These differences were canceled by calibration using the cumulative data of a normal rain gauge at the side of the office building. Stream flows were observed using a float-type water-level pen recorder at each 45 V-notch gauging weir. The weirs have been used since 939. In late August 997, the water-level recorders replaced similar devices equipped with potentiometers. The voltage data from a potentiometer were then recorded at 0-min intervals, and the water-level data that were read from the pen-recording charts were complemented by the voltage data. Simpson's rule was used for the calculation in the same manner as that for the data in reports published after August 976. The maximum time intervals of the water levels were fixed at 0 minutes for the calculation in this report. The maximum differences between the published data in the previous reports before August 976 and the data of the same period calculated by this report's method were estimated approximately 20 mm par water-year. Key words : Kamabuchi, cool-temperate zone, heavy snow region, montane forest,,, integration methods 2 ( 38 56, 40 5 ) 994 ~ ~ % 2~3 7% mm : 7 9 Received Nov. 9, Accepted Jun. 6, 2006 * Kansai Research Center, Forestry and Forest Products Research Institute (FFPRI),Nagaikyûtarô 68, Momoyama Kyôto , Japan ; hosodaik@affrc.go.jp ) Kansai Research Center, Forestry and Forest Products Research Institute (FFPRI) 2) Tohoku Research Center, Forestry and Forest Products Research Institute (FFPRI)

2 00 HOSODA I. and MURAKAMI W (, 2005) (, 2004) (, 200) (, 200) ( ) (2~4 ) 2 939~993 (, 952;, 96;, 980; 999) 994~2000 ( 38 56, 40 5 ) (Fig. ) (952) (984) Table 970~2000 ( ~ 0 2 ) mm. 53 cm ( 2005) (, 96) 2 947~ (, 980) (Fig. ) 3. 降水量 km 20 cm ( 0.5 mm) Fig.. 2 ( ) Location and topographic diagram of the Kamabuchi and experimental watersheds. The shaded areas represent the areas covered with shurabs and weeds because of snow glides (September 2003). 5, 2006

3 Hydrological observation reports of the Kamabuchi experimental watershed - and experimental watersheds-(january 994 to December 2000) m.9 m ~ (2~3 ) m ~ mm 0. mm (P met ) (P org ) P met P org P met P org (Fig. 2) ~ mm /0 (4~ ) P met P org % (2~3 ) P met P org 7% 0.99 Table. Topographic summary. 2 watershed watershed 3.06 ha 2.48 ha Watersheds area Geology Tuff and shaly tuff of the Tertiary formation 2 62~25 m 66~248 m Altitude Mean hillslope gradient 45.6 cm 48.0 cm Mean soil depth (952) Cited from Maruyama & Inose (952). 2 (984) Cited from Ono & Sato (984). 3.2 流水量 V (952) (0 ) 8 mm/hr 6 mm/hr (, 980) (952) (, 980;, 999)997 8 ~2 0 0 Fig. 2. (998~2000 ) : 4~ : 2~3 4~ 2~3 Relationships of observed data ( ). P met represents the meteorological station data and P org represents the data at the side of Yamagata experimental station office building, where those part about km southeastward from the experimental watershed. The data are the sums in every event. :data from April to November, : data from December to March. The solid line shows the regression line of, and the broken line shows the regression line of. Bulletin of FFPRI, Vol.5, No., 2006

4 02 HOSODA I. and MURAKAMI W ~954 0~ ~ ~ ~240 0 () ; S (2) ; A (3) ; B (4) ; C A Fig. 3. (939~2000 ) : B : C : S Daily differences according to the integration methods ( ). A-method:sum of water flows at every second over an interval of adjacent water levels. B-method( ): sum of the products of an interval time and a water flow calculated from an average water level over the interval of adjacent water levels. C-method ( ): sum of the products of an interval time and an average water flow over the interval of adjacent water flows. S-method ( ): sum of integrated water flows over an interval of adjacent water levels by Simpson's rule. Thick solid line shows the regression line of, thin solid line shows the regression line of, and broken line shows the regression line of. 5, 2006

5 Hydrological observation reports of the Kamabuchi experimental watershed - and experimental watersheds-(january 994 to December 2000) 03 B ~2000 (~5 ) (6~0 ) A (A ) A ( ) 0 A 000 mm A ~2 mm (Fig. 3) 2 B >S >C C A A B : S : C : B : S : C : C 0.97~0.98 C B S A S B S A 0 Fig. 3 A (, 980) S (S ) B 975 S 939~954 S 5 mm 955~975 0 mm (Fig.4)976 8 S 20 mm S S B mm 0.0 mm (Table 2) Fig. 4. S (939~975 ) : 939~954 6~0 : 955~975 6~0 : 939~954 ~5 : 955~975 ~5 Daily differences between data by S-method and the previous reports' data( ). : Jun. Oct. of , : Jun. Oct. of , : Nov. May of , : Nov. May of Bulletin of FFPRI, Vol.5, No., 2006

6 04 HOSODA I. and MURAKAMI W. Table 2. Reasons of water-level data missing, and dates (year/month/). 2 Reason watershed watershed Rebuilding of the observation hut 994/2/ /2/3-7, /08/25-27 Dredge 997/08/ /0/26-27 Flood in excess of the notch height 998/08/07 994/0/25-30, 04/05-5 Failure of water-level recorder 999/08/28-09/0 995/08/ /08/ /08/ /2/ /06/30-07/07 997/-2000/ "Failure of water-level recorder" includes the cases that failures concerned with pen, chart carriage, and float movement ~ Table 3 ( ) (200) ( ),, 260, 40. (999) 2 (979 ~993 2 ),, 376, 52. (2005) 2003 ~ ( ),2 3. (2004),, 260p. (952),, 53, 44. (200), 8, (96),, (984),,,, 57, (2005) 2005,, (980) 2 (959 ~978 2 ),, 3, , 2006

7 Hydrological observation reports of the Kamabuchi experimental watershed - and experimental watersheds-(january 994 to December 2000) 05 Table 3. 2 Daily s and s in the Kamabuchi and watersheds. 994 ~ 6 January 2 February 3 March 4 April 5 May 6 June ( Unit : mm) 2 No. 2 No Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 Bulletin of FFPRI, Vol.5, No., 2006

8 06 HOSODA I. and MURAKAMI W. Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) 994 7~2 7 July 8 August 9 September 0 October November 2 December 2 No. 2 No ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 5, 2006

9 Hydrological observation reports of the Kamabuchi experimental watershed - and experimental watersheds-(january 994 to December 2000) 07 Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) 995 ~ 6 January 2 February 3 March 4 April 5 May 6 June 2 No. 2 No ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 Bulletin of FFPRI, Vol.5, No., 2006

10 08 HOSODA I. and MURAKAMI W. Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) 995 7~2 7 July 8 August 9 September 0 October November 2 December 2 No. 2 No ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 5, 2006

11 Hydrological observation reports of the Kamabuchi experimental watershed - and experimental watersheds-(january 994 to December 2000) 09 Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) 996 ~ 6 January 2 February 3 March 4 April 5 May 6 June 2 No. 2 No ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 Bulletin of FFPRI, Vol.5, No., 2006

12 0 HOSODA I. and MURAKAMI W. Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) 996 7~2 7 July 8 August 9 September 0 October November 2 December 2 No. 2 No ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 5, 2006

13 Hydrological observation reports of the Kamabuchi experimental watershed - and experimental watersheds-(january 994 to December 2000) Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) 997 ~ 6 January 2 February 3 March 4 April 5 May 6 June 2 No. 2 No ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 Bulletin of FFPRI, Vol.5, No., 2006

14 2 HOSODA I. and MURAKAMI W. Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) 997 7~2 7 July 8 August 9 September 0 October November 2 December 2 No. 2 No ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 5, 2006

15 Hydrological observation reports of the Kamabuchi experimental watershed - and experimental watersheds-(january 994 to December 2000) 3 Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) 998 ~ 6 January 2 February 3 March 4 April 5 May 6 June 2 No. 2 No ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 Bulletin of FFPRI, Vol.5, No., 2006

16 4 HOSODA I. and MURAKAMI W. Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) 998 7~2 7 July 8 August 9 September 0 October November 2 December ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 5, 2006

17 Hydrological observation reports of the Kamabuchi experimental watershed - and experimental watersheds-(january 994 to December 2000) 5 Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) 999 ~ 6 January 2 February 3 March 4 April 5 May 6 June ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 Bulletin of FFPRI, Vol.5, No., 2006

18 6 HOSODA I. and MURAKAMI W. Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) 999 7~2 7 July 8 August 9 September 0 October November 2 December ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 5, 2006

19 Hydrological observation reports of the Kamabuchi experimental watershed - and experimental watersheds-(january 994 to December 2000) 7 Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) 2000 ~ 6 January 2 February 3 March 4 April 5 May 6 June ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 Bulletin of FFPRI, Vol.5, No., 2006

20 8 HOSODA I. and MURAKAMI W. Table 3. 2 ( ) Daily s and s in the Kamabuchi and watersheds. (Continued) ~2 7 July 8 August 9 September 0 October November 2 December ( Unit : mm) Minus values represent the estimated values of missing data. Total values are the sums of absolute values. 2 5, 2006

細田.indd

細田.indd (Bulletin of FFPRI), Vol.6, No.3 (No.404), 163-213, Sep. 2007 1 )* 2 ) Hydrological observation reports of the Kamabuchi experimental watershed and experimental watersheds ( 1961 to 2000) HOSODA Ikuhiro