つᶍᅵ◁⅏ᐖⓎ⏕ᚋࡢἙᕝࡢ㐺ษ࡞⥔ᣢ⟶⌮
ྥࡅࡓᾋ㐟◁ືែࡢศᯒ
ANALYSIS OF SUSPENDED SEDIMENT DYNAMICS FOR PROPER MAINTENANCE OF RIVER AFTER THE LARGE-SCALE SEDIMENT DISASTER
㜿㒊ᬛ
1࣭୰㔝ග㝯
2࣭ᮎᮏ๛ᚿ
3࣭ⱝᑿᣅᚿ
4࣭ෆ⏣㱟ᙪ
5Satoshi ABE,Mitsutaka NAKANO,Tsuyoshi SUEMOTO,Hiroshi WAKAO,Tatsuhiko UCHIDA
㠀ဨ ᅜᅵ㏻┬୰ᅜᆅ᪉ᩚഛᒁኴ⏣ᕝἙᕝົᡤ㸦ࠛ730-0013 ᗈᓥ┴ᗈᓥᕷ୰༊ඵᇼ3␒20ྕ㸧 ṇဨ ᅜᅵ㏻┬୰ᅜᆅ᪉ᩚഛᒁኴ⏣ᕝἙᕝົᡤ㸦ྠୖ㸧
㠀ဨ ୰㟁ᢏ⾡ࢥࣥࢧࣝࢱࣥࢺᰴᘧ♫ Ἑᕝ◁㜵㒊㸦ࠛ734-8510 ᗈᓥᕷ༡༊ฟộ┠3␒30ྕ㸧 㠀ဨ ୰㟁ᢏ⾡ࢥࣥࢧࣝࢱࣥࢺᰴᘧ♫ ⎔ቃ㒊ᘓタ⎔ቃࢢ࣮ࣝࣉ㸦ྠୖ㸧
ṇဨ ༤㸦ᕤ㸧ᗈᓥᏛᏛ㝔 ᩍᤵ ᕤᏛ◊✲⛉㸦739-8527 ᮾᗈᓥᕷ㙾ᒣ1-4-1㸧
In this paper, we report a result of two investigations which grasp the behavior of suspended sediment during a flood at the Nenotani-gawa River(in the Ota-gawa River basin). We measured the amount of the suspended sediment by means of surface water sampling turbidity with a turbidity meter installed in a bridge pier, water level at the station. It was investigated that the amount of the suspended sediment during the flood at the Nenotani-gawa River is relatively large compared with those reported at the other rivers in Japan. After the flood, we found that suspended sediment had been accumulated around the vegetation. The above made it clear that it is important to take into account of suspended sediment for a proper river management.
Key Words :suspended sediment, turbidity, vegetation, river management
㸯㸬ࡣࡌࡵ
㏆ᖺ㸪ᒁᆅⓗ࡞㞵ࡼࡾつᶍ⅏ᐖࡀᅜྛᆅ࡛Ⓨ
⏕ࡋ࡚࠸ࡿ㸬ᖹᡂ26ᖺ8᭶㞵࡛ࡣᗈᓥᕷ࠾࠸࡚つ ᶍ࡞ᒣ⭡ᔂቯࡸᅵ▼ὶࡼࡿ⏒࡞⿕ᐖࡀⓎ⏕ࡋ㸪⌧ᅾ
ࡶ◁㜵ሖሐࡢᘓタᕤࡀᐇࡉࢀ࡚࠸ࡿ㸬ᮏ㞵࡛ࡣᅵ
◁⅏ᐖࡢࡳ࡞ࡽࡎ㸪ᮏሗ࿌ࡢᑐ㇟ࡋ࡚࠸ࡿኴ⏣ᕝᨭᕝ
᰿㇂ᕝ࠾࠸࡚ࡶ㸪ከ㔞ࡢᅵ◁ࡀὶධࡋ㸦┿㸧㸪ᡓ ᚋ᭱ὶ㔞ࢆ᭦᪂ࡍࡿฟỈࡀⓎ⏕ࡋࡓ㸬ࡇࡢࡓࡵ㸪ᩚഛ ィ⏬┠ᶆὶ㔞ࢆぢ┤ࡋ㸪ୗὶࡽ㗦ព㸪⠏ሐ࣭Ἑ㐨ᣑᖜ ᕤ➼ࢆ㐍ࡵ࡚࠸ࡿࡇࢁ࡛࠶ࡿ㸬
᰿㇂ᕝࡣἙཱྀࡽ15k㏆࡛ኴ⏣ᕝᮏᕝྜὶࡍࡿᕥ ᨭᕝ࡛㸪ὶᇦ㠃✚ࡣ㸪87km2ኴ⏣ᕝỈ⣔ࡢ⣙5㸣ࢆ༨ࡵ
ࡿ㸦ᅗ㸧㸬᰿㇂ᕝ┤㎄⟶⌮༊㛫࠾ࡅࡿἙᗋ໙㓄ࡣ 1/130㹼1/420⛬ᗘ㸪௦⾲⢏ᚄ㸦d60㸧ࡣ20ੈ㹼37ੈ⛬ᗘ࡛
ࢭࢢ࣓ࣥࢺศ㢮ࡉࢀࡿ㸬ࢭࢢ࣓ࣥࢺ1ࡢ≉ᚩࡋ࡚Ἑ ᗋᮦᩱࡢᵓᡂࡣ▼♟࡛࠶ࡿࡓࡵ㸪Ἑᗋኚືࡢせᅉࡣ
ᤲὶ◁ᅉࡿࡇࡀከ࠸㸬
䝎䝮
ኴ⏣ᕝὶᇦ NP
᰿㇂ᕝὶᇦ NP
۔
۔ᗈᓥᕷ
㻌 ᅗᑐ㇟ὶᇦ㸦ኴ⏣ᕝὶᇦᅗ㸸᰿㇂ᕝ㸧
㻌 ᅵ▼ὶ䛜᰿㇂ᕝ䜎䛷ὶධ㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌⃮Ỉ䛾Ⓨ⏕≧ἣ㻌 㻌 㻌 㻌 㻌 㻌 㻌
┿ᖹᡂ26ᖺ8᭶㞵ࡼࡿ᰿㇂ᕝࡢ⿕⅏≧ἣ
報告 河川技術論文集，第24巻，2018年6月
ࡋࡋ᰿㇂ᕝࡢሙྜࡣ㸪ࡇࢀࡲ࡛ࡢᨵಟᕤ࡛Ἑ㐨ᖜ
ࢆ2ಸ⛬ᗘᣑᖜࡋ࡚ࡁࡓࡓࡵ㸪ᨵಟ῭༊㛫࡛ࡣᕝᖜỈ
῝ẚࡢୖ᪼క࠺↓ḟඖᤲὶຊࡀపୗࡋ࡚࠾ࡾ㸪ࡲࡓἙ ᗋᮦᩱࡀ⤒ᖺⓗ⣽⢏ࡋ࡚࠸ࡿഴྥࡀぢࡽࢀࡿ㸬
ᖹᡂ26ᖺ8᭶ฟỈᚋ࠾࠸࡚ࡶ㸪᳜⏕ࡢᤕᤊࡼࡿᾋ 㐟◁ࡢሁ✚ࡀぢࡽࢀࡓ㸦┿㸧㸬ᚋணᐃࡋ࡚࠸ࡿᨵ ಟ༊㛫࠾࠸࡚ࡶୗὶྠᵝἙ㐨ᖜࢆಸ⛬ᗘᣑᖜ ࡍࡿࡇࡽ㸪㛗ᮇⓗࡣỈ㒊ࡸἙᗋ໙㓄ኚⅬ➼
ࡢᾋ㐟◁ࡢሁ✚㔞ࡀቑຍࡋ㸪ฟỈつᶍᛂࡌࡓᅵ◁ືែ
≉ᛶኚࡀ⏕ࡌࡿࡇࡀᠱᛕࡉࢀࡿ㸬ࡑࡢࡓࡵ㸪᰿㇂
ᕝ࠾࠸࡚ࡣᤲὶ◁ࡢࡳ࡞ࡽࡎᾋ㐟◁ືែࢆⓗ☜ᢕᥱ ࡍࡿࡇࡀㄢ㢟࡞ࡗ࡚࠸ࡿ㸬
௨ୖࡢࡇࡽ㸪ᚋࡢἙᗋኚືண ࡢ⢭ᗘྥୖࡸ㐺 ษ࡞Ἑ㐨⟶⌮ྥࡅ㸪ᅵ◁⛣ືࡢⓗ☜࡞ᢕᥱࡢ⣒ཱྀࡋ
࡚㸪ᖹᡂ29ᖺ7᭶9᭶ࡢฟỈ࠾ࡅࡿᾋ㐟◁ࡢὶୗ≉ᛶ
ࢆᢕᥱࡍࡿࡇࢆ┠ⓗࡋࡓほ ࣭ศᯒࢆᐇࡋࡓ㸬
㸰㸬ㄪᰝᐇᖺࡢฟỈ≧ἣㄪᰝᐇᮇ ㄪᰝࢆᐇࡋࡓᖹᡂ29ᖺฟỈᮇ㛫ࡢ㸪ᅜᅵ㏻┬᪂ᕝ ᶫỈほ ᡤ㸦2㹩200㸧ࡢỈኚࢆᅗ♧ࡍ㸬ᖹᡂ 29ᖺࡣฟỈࡀ4ᅇⓎ⏕ࡋࡓ㸬ᅇ㸪ᾋ㐟◁ࡢືែࢆ㏣㊧
ࡍࡿࡓࡵࡢ⌧ᆅㄪᰝࡸᾋ㐟◁㔞ࡢ᥎ᐃࡢᑐ㇟ࡋࡓࡢࡣ㸪 ᖹᡂ29ᖺ7᭶5᪥9᭶17᪥ࡢฟỈ࡛࠶ࡿ㸬ࡇࡢฟỈ࠾
ࡅࡿ᪥㞵㔞ࡣ㸪㏆ഐࡢᯘほ ᡤࡼࡿ7᭶5᪥ࡀ 47mm㸪9᪥17᪥ࡀ72mm࡞ࡗ࡚࠾ࡾ㸪᪂ᕝᶫࡢほ Ỉ
ࡣỈ㜵ᅋᚅᶵỈࢆ㉸࠼ࡓ⛬ᗘᖹᆒᖺ᭱ὶ㔞ࡣ 120m3/s⛬ᗘ࡛࠶ࡗࡓ㸦⾲㸧㸬
୍᪉㸪᳜⏕ࡼࡿᅵ◁ࡢᤕᤊ≧ἣㄪᰝࡣ㸪6᭶26᪥
๓ㄪᰝ㸪7᭶3᪥9᭶22᪥ฟỈᚋㄪᰝࢆᐇࡋࡓ㸬
㸱㸬ㄪᰝ᪉ἲ
ฟỈࡢᾋ㐟◁
D⃮ᗘィࡢタ⨨
ฟỈ㏻㐣ࡍࡿᾋ㐟◁㔞ࡢ᥎ᐃࡣ㸪ᾋ㐟◁⃰ᗘ
ὶ㔞ࢹ࣮ࢱࡀᚲせ࡛࠶ࡿ㸬ࡑࡇ࡛㸪ᢏ⾡ᣦ㔪㸧㸧ࢆཧ⪃
ᖹᡂ29ᖺ1᭶㸪ᅜᅵ㏻┬᪂ᕝᶫỈほ ᡤ㏆ഐࡢ᪂ ᕝ ᶫ ࡢ ᶫ ⬮ ⃮ ᗘ ィ 㸦JFE ࢻ ࣂ ࣥ ࢸ ࢵ ࢡ ♫ 〇 INFINITY Turbi ᐃ⠊ᅖ㸸୰⃰ᗘ0㹼1,000FTU㸦㉥እ ගᚋ᪉ᩓᘧ㸧㸪㧗⃰ᗘ0㹼100,000ppm㸦㉥እගᚋ᪉ᩓ
ᘧ㸧 ࢭࣥࢧ࣮㧗ࡉ㸸ᖹỈࢭࣥࢧ࣮ࡀỈἐࡍࡿ⛬
ᗘࡢT.P.-0.2m ᐃ㛫㝸㸸10ศ㸪௨ୗ㸪ࠕ⃮ᗘィ㸦ᗏ ᒙ㸧ࠖࡍࡿ㸧ࢆタ⨨ࡋࡓ㸦ᅗ㸪┿㸧㸬
ࡇࡇ࡛㸪⃮ᗘィࡢ ᐃᑐ㇟ࡣぢࡅࡢ⃮ࡾᗘྜ࠸࡛࠶
ࡿ⃮ᗘ㸦FTU㸧࡛࠶ࡿࡢᑐࡋ㸪ᾋ㐟◁㔞ࢆồࡵࡿࡢ
ᚲせ࡞༢ࡣᾋ㐟≀㉁㔞㸦/L㸧࡛࠶ࡿ㸬ࡇࡢࡓࡵ㸪⃮
ᗘィࢆ⏝࠸࡚ᾋ㐟◁㔞ࢆ᥎ᐃࡍࡿࡓࡵࡣ㸪࠶ࡽࡌࡵ
タ⨨ࡍࡿᶵჾࡢฟຊ್ᾋ㐟◁⃰ᗘࡢ㛵ಀࢆᢕᥱࡋ࡚
࠾ࡃࡇࡀᚲせ࡞ࡿ㸬ࡑࡇ࡛ᢏ⾡ᣦ㔪㸧ࢆཧ⪃㸪タ
㻌
┿᪂ᕝᶫࡢᶫ⬮࠾ࡅࡿ⃮ᗘィࡢタ⨨≧ἣ
6/30 7/5 9/12 9/17
0 20 40 60 80 100 -1
0 1 2 3 4
6/1 7/1 8/1 9/1
ᯘ㛫㞵㔞䠄㼙㼙䠅
᪂ᕝᶫỈ㼀㻚㻼㻚㻌㻔㼙㻕
ほ Ỉ䠄᪂ᕝᶫỈほ ᡤ䠅 Ỉ㜵ᅋᚅᶵỈ
ỏ℃ὀពỈ ᯘ㞵㔞
㻌 ᅗ᰿㇂ᕝ࠾ࡅࡿᖹᡂ29ᖺฟỈᮇࡢỈཬࡧ㞵㔞
⾲ᾋ㐟◁ࡢほ ᑐ㇟ࡋࡓฟỈ㸦ᖹᡂ29ᖺ㸧
᭶᪥㻌 ᯘ㞵㔞ほ ᡤ㻌
᪥㞵㔞㻌
᪂ᕝᶫỈほ ᡤ㻌
᪥᭱Ỉ㻔T.P.㻕㻌
᪂ᕝᶫỈほ ᡤ㻌 ᆅⅬ㻌᪥᭱ὶ㔞㻌 䠄H-Qᘧ䛷䛾⟬್䠅㻌
7/5 47mm㻌 㻌 1.28m㻌 㻌 83m3/s㻌 㻌
9/17 72mm㻌 㻌 1.45m㻌 㻌 105m3/s㻌 㻌
ཧ⪃㻌ᖹỈ䠄2007䡚2016䠅 -0.17m㻌 㻌 0.9m3/s㻌 㻌
㻌
┿ ᖹᡂ26ᖺ8᭶㞵ᚋ᰿㇂ᕝ࡛ぢࡽࢀࡓ ࢩࢼࢲࣞࢫࢬ࣓࢞ࣖ➼ࡼࡿᅵ◁ࡢᤕᤊ≧ἣ
䠖᪂ᕝᶫỈほ ᡤ ซ
䠖᳜⏕䛻䜘䜛ᅵ◁ᤕᤊ≧ἣㄪᰝᆅⅬ 䉰㻝䠖䝩䝋䝮䜼⩌ⴠ
䉰㻠䠖䝇䝇䜻⩌ⴠ
ୖグ௨እ䛿䝅䝘䝎䝺䝇䝈䝯䜺䝲⩌ⴠ 䉰㻝
䉰㻞 䉰㻟
䉰㻠䉰㻡
䉰㻢 䉰㻣
䉰㻤
㻌 ᅗㄪᰝ⨨ᅗ
⨨ࡍࡿ⃮ᗘィࡘ࠸࡚㸪᰿㇂ᕝࡢሁ✚ᅵ◁㸦2ੈࡢࡩࡿ
࠸ࢆ㏻㐣ࡋࡓ࡚ࡢᅵ◁㸪 0.075ੈࡢࡩࡿ࠸ࢆ㏻㐣ࡋࡓ
࡚ࡢᅵ◁㸧ᕷ㈍࢝࢜ࣜࣥ㸦ᖹᆒ⢏ᚄȝP㸧ࢆ⏝࠸
࡚㸪ฟຊ್ᾋ㐟◁⃰ᗘࡢ㛵ಀᛶࢆᢕᥱࡍࡿ࢟ࣕࣜࣈ
࣮ࣞࢩࣙࣥࢆ⾜ࡗࡓ㸦ᅗ㸧㸬᪤ ࡢ◊✲㸧࡛♧ࡉࢀ࡚
࠸ࡿ㏻ࡾ㸪SS⃮ᗘࡢ㛵ಀࡣ⢏ᚄ౫Ꮡࡍࡿ㸬ࡇࡢࡇ
ࡘ࠸࡚ࡣ㸪⌧ᆅほ ⤖ᯝྜࢃࡏ࡚♧ࡍ㸬 EฟỈࡢ⾲㠃᥇Ỉ
⾲㠃᥇Ỉࡣ㸪ᅜᅵ㏻┬ࡢỈほ ᡤࡀ㏆ഐ࠶ࡾ㸪
⃮ᗘィࢆタ⨨ࡋࡓ᪂ᕝᶫ㸦ᅗ㸧࡛⾜ࡗࡓ㸬⌧ᆅ࡛ࡣ㸪 ὥỈࡢ❧ࡕୖࡀࡾࡽࣆ࣮ࢡࢆ⤒࡚Ỉ㜵ᅋᚅᶵỈࢆ༑
ศୗᅇࡿࡲ࡛ࡢᮇ㛫㸪ᶫୖࡼࡾ30ศࡽ1㛫㛫㝸࡛
ࣂࢣࢶࢆᢞୗࡋ࡚⾲㠃Ỉࢆ᥇Ỉࡋ㸪ከᡂศỈ㉁ィ㸦JFE
ࢻࣂࣥࢸࢵࢡ♫〇 AAQ1183s ⃮ᗘ ᐃ⠊ᅖ㸸୰⃰
ᗘ0㹼1,000FTU㸦㉥እගᚋ᪉ᩓᘧ㸧㸧࡛⃮ᗘࢆ ᐃᚋ㸪
࡚ࡢ⃮Ỉࢆ୍ಖ⟶ࡋࡓ㸬᥇Ỉ⤊ᚋ㸪⃮ᗘࡀࣆ࣮ࢡ
࡛࠶ࡗࡓ᳨యࡑࡢ๓ᚋࡢ᳨యࢆᣢࡕᖐࡾ㸪SSศᯒ㸦ᾋ 㐟≀㉁㔞 /L ⎔࿌➨59ྕ⾲9㸧⢏ᗘ⤌ᡂศᯒ 㸦JIS A1204㸧ࢆ⾜ࡗࡓ㸬
᳜⏕ࡼࡿᅵ◁ᤕᤊ≧ἣ
᰿㇂ᕝࡢἙ㐨ෆ࠾࠸࡚᳜≀ࡢ⩌ⴠࡀぢࡽࢀ㸪ࡑࡢ᰿
㝿ᅵ◁ࡀሁ✚ࡋ࡚࠸ࡿࡼ࠺࡞⟠ᡤࢆ8ᆅ༊㸪ㄪᰝᆅⅬ
ࡋ࡚㑅ᐃࡋ㸪ㄪᰝᆅⅬෆࡢ᳜⏕ෆࡲࡓࡣࡑࡢ࿘㎶ࡢ〄
ᆅྜィ29ᮏࡢ㕲ᮺࢆᇙࡵ㸪ሁ✚㸭Ὑᇼཌࡢᣦᶆࡋࡓ㸬
࡞࠾8ᆅ༊ࡢ᳜⏕ࡣ࣍ࢯ࣒ࢠ⩌ⴠࡀ1ᆅⅬ㸪ࢩࢼࢲࣞࢫ ࢬ࣓࢞ࣖࡀ6ᆅⅬ㸪ࢫࢫ࢟⩌ⴠࡀ1ᆅⅬ࡛࠶ࡿ㸬
ฟỈᚋୖグࡢㄪᰝᆅⅬෆࢆ㋃ᰝࡋ㸪㕲ᮺࢆᇙࡵࡓᆅ
Ⅼ࠾࠸࡚㸪ሁ✚㸭Ὑᇼཌࢆィ ࡋࡓ㸬ࡲࡓ㸪ሁ✚ࡀ㢧 ⴭ࡞⟠ᡤࡘ࠸࡚ࡣሁ✚㒊ศ⾲ᒙࡢ◁ࢆᣢࡕᖐࡾ㸪ᐊෆ
࡛⢏ᗘ⤌ᡂࢆศᯒࡋࡓ㸦JIS A1204㸧㸬
㸲㸬ㄪᰝ⤖ᯝ⪃ᐹ
ฟỈࡢᾋ㐟◁
D⌧ᆅほ
7᭶5᪥9᭶17᪥ࡢ⾲㠃᥇Ỉࢆᐇࡋࡓᮇ㛫ࡢ⃮ᗘ
Ỉࡢኚࢆᅗ㸪ᅗ㸪ཬࡧ⾲♧ࡍ㸬7᭶5᪥ࡣ᥇ Ỉ㛤ጞࡀ᪤⃮ᗘཬࡧỈࡢࣆ࣮ࢡࢆ㐣ࡂ࡚࠸ࡓࡓࡵ
❧ࡕୖࡀࡾ㛵ࡍࡿࢹ࣮ࢱࡣᚓࡽࢀ࡚࠸࡞࠸ࡀ㸪9᭶17
᪥ࡢ᥇Ỉࡘ࠸࡚ࡣ⃮ᗘỈࡢࣆ࣮ࢡࢆྵࡴ㛫ᖏ࡛
ᐇ࡛ࡁࡓ㸬
9᭶17᪥ࡢ⃮ᗘィ㸦ᗏᒙ㸧ࡢほ ್ࡢ್᭱ࡣ1920
ศ236FTUࢆほ ࡋࡓ㸬⾲㠃᥇Ỉࢆ⾜ࡗࡓ้࡛⃮ᗘ
ࡀ᭱࡞ࡗࡓࡢࡣ19࡛࠶ࡾ㸪182FTUࢆほ ࡋࡓ㸬
ྠ้ࡢ⃮ᗘィ㸦ᗏᒙ㸧ࡣ225FTU࡛࠶ࡗࡓ㸬ࡲࡓ㸪⾲
㠃᥇Ỉ㸦⾲ᒙ㸧ᶫ⬮タ⨨ࡋࡓ⃮ᗘィ㸦ᗏᒙ㸧ࡢᕪࡀ
᭱࡞ࡗࡓࡢࡣ㸪⃮ᗘࣆ࣮ࢡࡼࡾ10ศ㐜࠸1930ศ࡛
࠶ࡾ㸪45FTU࡞ࡗࡓ㸬
㻜 㻝 㻝㻜 㻝㻜㻜 㻝㻘㻜㻜㻜 㻝㻜㻘㻜㻜㻜
㻜 㻝 㻝㻜 㻝㻜㻜 㻝㻘㻜㻜㻜 㻝㻜㻘㻜㻜㻜
⃮ᗘ䠄FTU䠅
SS䠄mg/L䠅 䜻䝱䝸䝤䝺䞊䝅䝵䞁⤖ᯝ䠖 䜹䜸䝸䞁䠄ᖹᆒ⢏ᚄ 㻜㻚㻢ȝm㸧 䜻䝱䝸䝤䝺䞊䝅䝵䞁⤖ᯝ䠖 Ἑᕝ䛾ሁ✚ᅵ◁䠄㻜㻚㻜㻣㻡mm௨ୗ䛶䠅 䜻䝱䝸䝤䝺䞊䝅䝵䞁⤖ᯝ䠖 Ἑᕝ䛾ሁ✚ᅵ◁䠄㻞㻚㻜mm௨ୗ䛶䠅
⌧ᆅ䛷⾲㠃᥇Ỉ䛧䛯⃮Ỉ
㻌 ᅗ᪂ᕝᶫᶫ⬮タ⨨ࡋࡓ⃮ᗘィࡢ⃮ᗘSSࡢ㛵ಀཬࡧ
⾲㠃᥇Ỉࡼࡾᚓࡽࢀࡓ⃮ᗘSSࡢ㛵ಀ
0 50 100 150 200 250 300
㻣㻦㻜㻜 㻤㻦㻜㻜 㻥㻦㻜㻜 㻝㻜㻦㻜㻜 㻝㻝㻦㻜㻜 㻝㻞㻦㻜㻜 㻝㻟㻦㻜㻜 㻝㻠㻦㻜㻜 㻝㻡㻦㻜㻜 㻝㻢㻦㻜㻜 㻝㻣㻦㻜㻜 0.0 0.5 1.0 1.5 2.0
⃮ᗘ䠄FTU䠅 ᪂ᕝᶫỈT.P. (m)
ほ Ỉ䠄᪂ᕝᶫỈほ ᡤ䠅 Ỉ㜵ᅋᚅᶵỈ
ỏ℃ὀពỈ ⃮ᗘ䠄᪂ᕝᶫᶫ⬮䛾⃮ᗘィ䠅
⃮ᗘ䠄⾲㠃᥇Ỉ䛧䛯Ỉ䜢 ᐃ䠅
㻌 ᅗฟỈࡢほ ⤖ᯝ㸦ᖹᡂ29ᖺ7᭶5᪥㸧
0 50 100 150 200 250 300
㻝㻡㻦㻜㻜 㻝㻢㻦㻜㻜 㻝㻣㻦㻜㻜 㻝㻤㻦㻜㻜 㻝㻥㻦㻜㻜 㻞㻜㻦㻜㻜 㻞㻝㻦㻜㻜 㻞㻞㻦㻜㻜 㻞㻟㻦㻜㻜 0.0 0.5 1.0 1.5 2.0
⃮ᗘ䠄FTU䠅 ᪂ᕝᶫỈT.P. (m)
ほ Ỉ䠄᪂ᕝᶫỈほ ᡤ䠅 Ỉ㜵ᅋᚅᶵỈ
ỏ℃ὀពỈ ⃮ᗘ䠄᪂ᕝᶫᶫ⬮䛾⃮ᗘィ䠅
⃮ᗘ䠄⾲㠃᥇Ỉ䠅
㻌 ᅗฟỈࡢほ ⤖ᯝ㸦ᖹᡂ29ᖺ9᭶17᪥㸧
⾲⾲㠃᥇ỈࡋࡓỈࡢ⃮ᗘᐊෆศᯒ⤖ᯝ
᥇Ỉ᪥㻌 ⃮ᗘ䠄FTU䠅㻌 䠯䠯 (×102䟘/䠨)
⢏ᗘ⤌ᡂ㻌 㻌䠄䠂䠅
⾲㠃㻌 ᥇Ỉ㻌 㻌
ཧ⪃䠖㻌 ᶫ⬮㻌
⃮ᗘィ㻌
◁ศ 0.075䡚2䟚
⣽⢏ศ 0.075䟚 ௨ୗ
7/5 10䠖40 162 175 3.2 89.4 10.6
11䠖10 127 122 2.3 87.8 12.2
9/17
18:00 112 141 2.6 89.6 10.4
18:30 169 202 3.0 89.8 10.2
19:00 182 225 3.5 䠉 䠉
19:30 179 224 3.5 䠉 䠉
20:00 176 200 3.5 䠉 䠉
20:30 144 166 3.0 88.9 11.1
21:30 98 108 2.1 䠉 䠉
22:30 74 83 1.4 䠉 䠉
୍᪉㸪Ỉࣆ࣮ࢡࡣ⃮ᗘࣆ࣮ࢡࡼࡾ40ศ㐜࠸20࡛㸪 Ỉࡣ1.45m㸦ὶ㔞⟬್ࡀ105m3/s㸧࡛࠶ࡗࡓ㸬ࡇࡇ࡛
⃮ᗘỈࡢ㛵ಀࡋ࡚㸪ὶᇦ࡛⏕⏘ࡉࢀࡓᅵ◁ࡣ୍ᵝ
Ἑ㐨ὶฟࡋ࡚ୗὶ㐠ᦙࡉࢀࡿࢃࡅ࡛ࡣ࡞ࡃ㸪࡞
ࡾࡢ㔞ࡣἙᓊࡸ㧗Ỉᩜ➼ሁ✚ࡋ࡚࠸ࡓᅵ◁ࡀࡑࡢᚋࡢ
ึᮇ㝆㞵࡛ὶฟࡍࡿࡓࡵ㸪ᅵ◁⃰ᗘࡢࣆ࣮ࢡࡣὥỈࣆ࣮
ࢡࡼࡾ᪩ࡃ⏕㉳ࡍࡿࡇࡀከࡃ㸪ḟ࠸࡛ྠ้࡞ࡿࡇ
ࡀከ࠸ゝࢃࢀ࡚࠸ࡿ㸧㸬 9᭶17᪥ࡣࡇࡢ▱ぢ୍⮴
ࡋ㸪7᭶5᪥ࡣ㏫࡞ࡗࡓ㸬ࡇࢀࡣᅗࡢ࠾ࡾ㸪7᭶5᪥
࡛ࡣほ ๓ࡢ6᭶30᪥ㄪᰝᑐ㇟ࡼࡾࡁ࡞ฟỈࡀ࠶ࡗ ࡓࡓࡵ㸪ࡇࡢฟỈࡼࡗ࡚㧗Ỉᩜ➼ሁ✚ࡋ࡚࠸ࡓᅵ◁
ࢆὙ࠸ὶࡋࡓྍ⬟ᛶࡀ࠶ࡿ㸬᭦㸪᰿㇂ᕝࡢሙྜࡣ㸪ฟ Ỉࣇ࣮ࣝࢻᩘࡀࡁࡃ࡞ࡾᑕὶ㏆ࡃ㸪ὶ㔞ࡢቑỈ ᮇῶỈᮇ࡛ὶ㏿ᕪࡀࢇⓎ⏕ࡋ࡞࠸㸬ࡇࡢࡓࡵ㸪 7᭶5᪥࡛ࡣ㸪ቑỈᮇࡢᛴ⃭࡞Ỉୖ᪼ᅵ◁⃰ᗘୖ᪼ࡀ
㏣㝶࡛ࡁࡎ㸪ὥỈࣆ࣮ࢡࢆ㐣ࡂ࡚ῶỈᮇධࡗ࡚ࡶᅵ◁
⃰ᗘࡀୖ᪼ࡋࡓ⪃࠼ࡽࢀࡿ㸬
Eᐊෆศᯒ
⌧ᆅ᥇Ỉ⃮Ỉࡢᐊෆศᯒ⤖ᯝࢆ⾲♧ࡍ㸬7᭶5᪥㸪 9᭶17᪥ࡶ㸪⾲㠃᥇Ỉࡢ⃮Ỉྵࡲࢀࡿ⢏Ꮚࡣ◁ศ 㸦0.075ੈ㹼2ੈ㸧ࡀ80㸣⛬ᗘࢆ༨ࡵ࡚࠾ࡾ㸪2ੈࡼࡾ
ࡁ࠸⢏ᚄࡣྵࡲࢀ࡚࠸࡞ࡗࡓ㸬ࡲࡓ㸪⃮ᗘཬࡧSS◁
ศࡢᵓᡂẚࡣᴫࡡẚ㛵ಀ࠶ࡾ㸦ᅗ㸧㸪◁ศࡢᵓᡂ ẚࡀ᭱࡞ࡗࡓࡢࡣ9᭶17᪥ࡢ1830ศࡢ᳨య࡛㸪⾲
㠃᥇Ỉࡢ⃮ᗘࡀ169FTU㸪SSࡀ300/L㸪◁ศࡢᵓᡂẚࡀ 89.8㸣࡛࠶ࡗࡓ㸬
᳜⏕ࡼࡿᅵ◁ᤕᤊ≧ἣ
ㄪᰝ⤖ᯝࡢᴫせࢆᅗ㸪ᅵ◁ࡢሁ✚ཬࡧὙᇼ≧ἣࢆ
┿♧ࡍ㸬7᭶3᪥ࡢㄪᰝࡢ⤖ᯝ㸪ฟỈࡼࡾᅵ◁ࡀ ሁ✚ࡋࡓࡢࡣ8⟠ᡤ㸪Ὑ᥀ࡋࡓࡢࡣ8⟠ᡤ㸪ሁ✚ཌࡣᖹᆒ
࡛33mm㸦᭱ࡀ91mm㸪᭱ᑠࡀ3mm㸧㸪Ὑ᥀ཌࡣᖹᆒ
࡛24mm㸦᭱ࡀ93mm㸪᭱ᑠࡀ3mm㸧࡛࠶ࡗࡓ㸬୍᪉㸪 9᭶22᪥ࡢㄪᰝࡢ⤖ᯝ㸪ฟỈࡼࡾᅵ◁ࡀሁ✚ࡋࡓࡢࡣ 13⟠ᡤ㸪Ὑ᥀ࡋࡓࡢࡣ6⟠ᡤ㸪ሁ✚ཌࡣᖹᆒ࡛17mm㸦᭱
ࡀ63mm㸪᭱ᑠࡀ3mm㸧㸪Ὑ᥀ཌࡣᖹᆒ࡛76mm㸦᭱
ࡀ308mm㸪᭱ᑠࡀ7mm㸧࡛࠶ࡗࡓ㸬୍㒊እࡣ࠶ࡿ
ࡶࡢࡢ㸪࠸ࡎࢀࡢㄪᰝ࡛ࡶ᳜⏕ෆ࡛ࡣሁ✚ࡋ㸪᳜⏕ࡽ
㞳ࢀࡓ〄ᆅ࡛ࡣὙᇼࡍࡿഴྥ࡛࠶ࡗࡓ㸬
ᮏ◊✲࡛タࡅࡓ8ᆅ༊ࡢ࠺ࡕ6ᆅ༊ࡣࢩࢼࢲࣞࢫࢬ࣓࢞
ࣖ⩌ⴠෆ࡛࠶ࡿ㸬ࢩࢼࢲࣞࢫࢬ࣓࢞ࣖࡣ◁ࢆሁ✚ࡉࡏࡸ
ࡍࡃ㸪ࢩࢼࢲࣞࢫࢬ࣓࢞ࣖࡢ⿕ᗘ◁ࡢཌࡉࡢ㛫ࡣ
᭷ព࡞ṇࡢ┦㛵ࡀ࠶ࡿࡇࡀ▱ࡽࢀ࡚࠸ࡿ㸧ࡀ㸪ᅇࡢ ㄪᰝࡢ⤖ᯝ࡛ࡶ㸪7᭶3᪥9᭶22᪥ࡶ㸪ࢩࢼࢲࣞࢫ ࢬ࣓࢞ࣖ⩌ⴠࡣ㢧ⴭ࡞ᅵ◁ࡢሁ✚ࡀぢࡽࢀࡿ⟠ᡤࡀ
࠶ࡗࡓ㸬
ሁ✚ࡀ㢧ⴭ࡛࠶ࡗࡓ㒊ศࡢ⢏ᗘ⤌ᡂศᯒ⤖ᯝࢆ⾲
♧ࡍ㸬⢏ᗘ⤌ᡂࡣ♟ศࡀ࡛᭱10㸣㸪◁ศࡀ80㸣⛬ᗘ㸪
⣽⢏ศࡀ࡛᭱20㸣⛬ᗘ࡛࠶ࡾ㸪◁ศࡀ࡛࠶ࡗࡓ㸬
᰿㇂ᕝ࠾ࡅࡿᾋ㐟◁ࡢ⛣ື࣭ሁ✚㐣⛬
ᅇࡢ⌧ᆅㄪᰝࡢ⤖ᯝ㸪⾲㠃᥇Ỉࡼࡾᚓࡽࢀࡓᾋ㐟
◁㸪ฟỈᚋ᳜⏕ࡢ࿘ᅖ࡛ሁ✚ࡋࡓᅵ◁ࡢᵓᡂࡣ㸪࠸
ࡎࢀࡶᴫࡡ80㸣ࡀ◁ศ୍࡛⮴ࡋ࡚࠸ࡓ㸦⾲㸪⾲㸧㸬 ࡇࡢࡇࡽ㸪ฟỈὶୗࡋࡓᾋ㐟◁ࡣ㸪᳜⏕ᤕᤊ ࡉࢀ࡚Ἑᗋሁ✚ࡋࡓྍ⬟ᛶࡀ㧗࠸⪃࠼ࡽࢀࡿ㸬
-100 0 100
㻤㼋㻞㻤 㻤㼋㻞㻣 㻤㼋㻞㻢 㻤㼋㻞㻡 㻣㼋㻞㻠 㻣㼋㻞㻟 㻣㼋㻞㻞 㻣㼋㻞㻝 㻢㼋㻞㻜 㻢㼋㻝㻥 㻢㼋㻝㻤 㻢㼋㻝㻣 㻡㼋㻞㻥 㻡㼋㻝㻢 㻡㼋㻝㻡 㻠㼋㻝㻠 㻠㼋㻝㻟 㻠㼋㻝㻞 㻟㼋㻝㻝 㻟㼋㻝㻜 㻟㼋㻥 㻟㼋㻤 㻞㼋㻣 㻞㼋㻢 㻞㼋㻡 㻞㼋㻠 㻝㼋㻟 㻝㼋㻞 㻝㼋㻝
ሁ✚䞉Ὑᇼཌ(䟚)
ᶓ㍈䛿ᆅⅬ␒ྕ䠄㻝䡚㻤䠅䛸䚸ᆅⅬෆ䛻タ⨨䛧䛯㕲ᮺ䠄ᘏ䜉㻞㻥ᮏ䠅䛾␒ྕ䜢♧䛧䛶䛔䜛 㻣㻛㻟㻌ኚ㔞
䕔᳜⏕ෆ䛾ᮺ䕔〄ᆅ䛾ᮺ
-308㼙㼙㻔㻺㼛㻚㻣㼋㻞㻟Ὑ᥀㔞㻕 -100
0 100
㻤㼋㻞㻤 㻤㼋㻞㻣 㻤㼋㻞㻢 㻤㼋㻞㻡 㻣㼋㻞㻠 㻣㼋㻞㻟 㻣㼋㻞㻞 㻣㼋㻞㻝 㻢㼋㻞㻜 㻢㼋㻝㻥 㻢㼋㻝㻤 㻢㼋㻝㻣 㻡㼋㻞㻥 㻡㼋㻝㻢 㻡㼋㻝㻡 㻠㼋㻝㻠 㻠㼋㻝㻟 㻠㼋㻝㻞 㻟㼋㻝㻝 㻟㼋㻝㻜 㻟㼋㻥 㻟㼋㻤 㻞㼋㻣 㻞㼋㻢 㻞㼋㻡 㻞㼋㻠 㻝㼋㻟 㻝㼋㻞 㻝㼋㻝
ሁ✚䞉Ὑᇼཌ(䟚)
ᶓ㍈䛿ᆅⅬ␒ྕ䠄㻝䡚㻤䠅䛸䚸ᆅⅬෆ䛻タ⨨䛧䛯㕲ᮺ䠄ᘏ䜉㻞㻥ᮏ䠅䛾␒ྕ䜢♧䛧䛶䛔䜛 㻥㻛㻞㻞ኚ㔞
䕔᳜⏕ෆ䛾ᮺ䕔〄ᆅ䛾ᮺ
㻌 ᅗ᳜⏕ࡼࡿᅵ◁ᤕᤊ≧ἣ⦪㍈ࡢṇࡀሁ✚
⾲ሁ✚ᅵ◁ࡢሁ✚ࡲࡓࡣ㣗ཌཬࡧ⢏ᗘ⤌ᡂศᯒ⤖ᯝ
ㄪᰝ᪥ ᆅⅬ␒ྕ䞉ᮺ␒ྕ
䠄⩌ⴠ䛾せᵓᡂ✀䠅 ሁ✚
ཌ 䠄mm䠅
⢏ᗘ⤌ᡂ㻌䠄㸣䠅
♟ศ (2mm ௨ୖ)
◁ศ 䠄0.075
䡚 2mm䠅
⣽⢏ศ (0.075mm
௨ୗ) 7/3
No.䠎-7䠄䝅䝘䝎䝺䝇䝈䝯䜺䝲䠅 91 10.5 89 0.5
No.3-10䠄䝅䝘䝎䝺䝇䝈䝯䜺䝲䠅 6 0.2 94.3 5.5
No.8-25䠄䝅䝘䝎䝺䝇䝈䝯䜺䝲䠅 31 9.4 83.7 6.9
9/22
No.1-3䠄䝩䝋䝮䜼䠅䈜 32 0.5 77.4 22.1
No.2-7䠄䝅䝘䝎䝺䝇䝈䝯䜺䝲䠅 63 0.4 99 0.6
No.8-䠎8䠄䝅䝘䝎䝺䝇䝈䝯䜺䝲䠅 15 12.2 86.3 12.2
䈜ᮺ䛿᳜⏕࿘㎶䛾〄ᆅ䛻タ⨨䠄䛣䜜௨እ䛿᳜⏕ෆ䛻タ⨨䠅㻌
㻤㻡 㻤㻢 㻤㻣 㻤㻤 㻤㻥 㻥㻜
㻝㻜㻜 㻝㻡㻜 㻞㻜㻜
⾲㠃᥇Ỉ䛧䛯⃮Ỉ䛾◁ศᵓᡂẚ䠂
⾲㠃᥇Ỉ䛧䛯⃮Ỉ䛾
⃮ᗘ䠄㻲㼀㼁㻕 㻣㻛㻡᥇Ỉ 㻥㻛㻝㻣᥇Ỉ
㻤㻡 㻤㻢 㻤㻣 㻤㻤 㻤㻥 㻥㻜
㻞㻜㻜 㻟㻜㻜 㻠㻜㻜
⾲㠃᥇Ỉ䛧䛯⃮Ỉ䛾◁ศᵓᡂẚ䠂
⾲㠃᥇Ỉ䛧䛯⃮Ỉ䛾 㻿㻿䠄㼙㼓㻛㻸㻕
㻣㻛㻡᥇Ỉ 㻥㻛㻝㻣᥇Ỉ
㻌
ᅗ⢏ᗘศᯒࡋࡓỈࡢ⃮ᗘཬࡧSS◁ศᵓᡂẚࡢ㛵ಀ
㻌 㻌
ሁ✚㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌Ὑᇼ㻌 㻌 㻌 㻌 㻌 㻌 㻌
┿ฟỈᚋࡢᅵ◁ࡢሁ✚Ὑᇼ
࢟ࣕࣜࣈ࣮ࣞࢩ࡛ࣙࣥᢕᥱࡋࡓ⃮ᗘ66ࡢ㛵ಀᛶ ࡢጇᙜᛶ
ᅇ⾲㠃᥇ỈࡋࡓỈྵࡲࢀࡿ⢏Ꮚࡣ⢏ᗘ⤌ᡂศᯒ
ࡼࡾ࡛᭱2mm࡛࠶ࡗࡓࡓࡵ㸪ᮏ᮶ࡣ2mm௨ୗࡢᅵ◁
࡛ᚓࡽࢀࡓ㛵ಀᘧࡽ᥎ᐃࡍࡿࡉࢀ࡚࠸ࡿ1)㸬ࡋࡋ㸪
࢟ࣕࣜࣈ࣮ࣞࢩ࡛ࣙࣥᚓ࡚࠸ࡓ⃮ᗘSSࡢ㛵ಀᛶࡽ
ồࡵࡓ᥎ᐃ್ࡘ࠸࡚㸪⾲㠃᥇Ỉ࡛ᚓࡽࢀࡓ⃮ᗘ㸦⌧ᆅ ᐃ㸧SS㸦ᐊෆศᯒ㸧ࡢᐇ ್ࢆ⏝࠸࡚☜ㄆࡋࡓࡇ
ࢁ㸦ᅗ㸧㸪ᐇ ್᭱ࡶ㏆࠸᥎ᐃ್ࡣ㸪࢝࢜ࣜࣥࢆ⏝
࠸࡚సᡂࡋࡓ㛵ಀᘧࡽࡢ್࡛࠶ࡗࡓ㸬ࡇࢀࡣ㸪⃮ᗘィ ࡣ⢏ᚄࡀࡁ࡞⢏Ꮚࡣᛂࡋࡃ࠸㸦┠Ᏻࡋ࡚㸪⢏
ᚄ0.42mm௨ୖ࡛ᛂࡀᝏࡃ࡞ࡿ㸧㸧⢏ᚄ౫Ꮡᛶࡢㄗᕪ
ࡼࡿࡶࡢ࡛࠶ࡾ㸪ྠࡌᠱ⃮≀㉁⃰ᗘ㸦SS㸧࡛࠶ࡗ࡚ࡶ㸪
ྵ᭷ࡍࡿᚤ⣽⢏Ꮚࡢྜࡀᑡ࡞࠸㸪⃮ᗘࡀపࡃ࡞ࡿ㸬
ᅇࡢ࢟ࣕࣜࣈ࣮ࣞࢩࣙࣥࡢࡼ࠺Ἑᕝࡢ◁ᕞሁ✚ࡋ ࡓᅵ◁ࢆ⏝࠸࡚⾜࠺㸪⾲♧ࡍᐇ㝿ࡢ⃮Ỉࡢࡼ࠺࡞㸪
⣽⢏ศࡀ༑ศྵࡲࢀࡓ≧ែࢆ⌧࡛ࡁࡎ㸪⤖ᯝࡋ࡚
⃮ᗘィࡢᛂࡀᝏࡃ࡞ࡗࡓࡶࡢ⪃࠼ࡽࢀࡿ㸬࡞࠾㸪ᅜ ෆࡢἙᕝ࡛⾜ࢃࢀ࡚࠸ࡿ࢟ࣕࣜࣈ࣮ࣞࢩࣙࣥ࠾࠸࡚
ࡶ㸪ᅗࡲࡓࡣᅗࡢࡼ࠺㸪ᐇ㦂⏝࠸ࡿᾋ㐟◁
⢏ᚄࡀከࡃྵࡲࢀࡿ㸪ᾋ㐟◁⃰ᗘᑐࡋ࡚⃮ᗘࡀప ࡃ࡞ࡿ㸦⃮ᗘィࡢᛂࡀᝏࡃ࡞ࡿ㸧ഴྥࡀ☜ㄆࡉࢀ࡚࠸
ࡿ㸧㸧㸬
௨ୖࢆཷࡅ࡚ᅇࡣ㸪࢟ࣕࣜࣈ࣮ࣞࢩ࡛ࣙࣥᚓࡓ⃮ᗘ
ᾋ㐟◁⃰ᗘࡢ㛵ಀᛶࡣ⏝࠸ࡎ㸪ᅗ♧ࡋࡓ㸪10ᅇࡢ
⾲㠃᥇Ỉ࡛ᚓࡽࢀࡓ⃮ᗘᾋ㐟◁⃰ᗘࡢ㛵ಀᛶࢆ⏝࠸࡚
᥎ᐃࡋ㸪Q-Qsᘧࢆḟ⠇᳨࡛ウࡍࡿ㸬
ᾋ㐟◁㔞ࡢ᥎ᐃ㸦44Vᘧࡢ⟬ᐃ㸧
ᾋ㐟◁㔞Qsࡢ᥎ᐃࡋ࡚㸪7᭶5᪥9᭶17᪥ࡢ2ࡘࡢฟ Ỉࡢ࠺ࡕ㸪⾲㠃᥇Ỉࢆ⾜ࡗࡓᮇ㛫ࢆᑐ㇟㸪Q-Qsᘧ 㸦ὶ㔞Qᾋ㐟◁㔞Qsࡢ㛵ಀᘧ㸧ࢆసᡂࡋࡓ㸬ὶ㔞Qࡣ ᪂ᕝᶫỈほ ᡤࡢỈࡽH-Qᘧࢆ⏝ࡋ⟬ฟࡋࡓ್
ࢆ⏝࠸㸪Qsࢆồࡵࡿࡓࡵࡢᾋ㐟◁⃰ᗘࡣ㸪ᐊෆศᯒࡼ
ࡿSS㸪⌧ᆅほ ࡼࡾᢕᥱࡋࡓ⃮ᗘSSࡢ㛵ಀᛶ
ࢆ⏝࠸࡚㸪⃮ᗘࡽᾋ㐟◁⃰ᗘࢆ᥎ᐃࡋࡓ㸬࡞࠾㛵ಀᘧ ࡢసᡂ࠶ࡓࡗ࡚㸪⃮ᗘཬࡧỈࡢࣆ࣮ࢡ㏆ࢆ୰ᚰ㸪
⾲ᒙୗᒙ࡛⃮ᗘࡀࡁࡃ␗࡞ࡿࡇࡽ㸦ᅗ㸪⾲
㸧㸪⃮ᗘࡘ࠸࡚ࡣ㸪2ᒙࡢ್ࡢᖹᆒࢆ⏝࠸ࡓ㸬 ồࡵࡓQ-Qsࡢ㛵ಀᘧࢆᅗ♧ࡍ㸬ࡇࡇ࡛㸪ᅗ୰
♧ࡋ࡚࠸ࡿᅜෆࡢୖ㝈ୗ㝈ࡣ㸪ཧ⪃㈨ᩱ㸧♧
ࡉࢀ࡚࠸ࡿ㸪Ἑᕝὶ㔞࢛࢘ࢵࢩ࣮ࣗࣟࢻ㔞ࡢ㛵ಀࡢண ᘧ♧ࡉࢀ࡚࠸ࡿୖ㝈ୗ㝈࡛࠶ࡾ㸪♧ࡉࢀ࡚࠸ࡓほ ᆅⅬಀࡿἙᕝྡ➼ࡢሗࡽほ ᆅⅬࡢࢭࢢ࣓ࣥࢺ
ࢆබ⾲㈨ᩱ➼࡛☜ㄆࡋࡓࡇࢁ㸪ᴫࡡࢭࢢ࣓ࣥࢺ2ࡲࡓ ࡣ3⨨ࡋ࡚࠸ࡓ㸬
ᅗࡢ࠾ࡾ㸪᰿㇂ᕝ࠾ࡅࡿᾋ㐟◁㔞ࡣᅜෆࡢ
ࡢୖ㝈ୗ㝈ࡢ㛫࠶ࡿࡀ㸪ࡸࡸୖ㝈㏆࠸㸬ࡇࡢせ ᅉࡋ࡚ࡣ㸪௨ୗࡀ⪃࠼ࡽࢀࡿ㸬
࣭᰿㇂ᕝὶᇦࡢᒣᆅࡢ⾲㠃ࡣ࣐ࢧᅵ࡛࠶ࡾ㸪ࡲࡓὶᇦࡢ
ᒣᆅࡣᅵ◁⅏ᐖࢆཷࡅࡓᙳ㡪ࡼࡾ〄ᆅࡀከࡃ㸦┿
㸧㸪㝆㞵Ἑᕝᅵ◁ࡀὶධࡋࡸࡍ࠸≧ἣ࡛࠶ࡿ㸬
࣭᰿㇂ᕝࡣࢭࢢ࣓ࣥࢺ1࡛࠶ࡾ㸪ᅜෆࡢἙᕝࡢࢭࢢ࣓
ࣥࢺ2ࡲࡓࡣ3ࡢ໙㓄ࡀ⦆࠸Ἑᕝẚࡿ㸪ᅵ◁ὶ㏦
ຊࡀ㧗ࡃᕳࡁୖࡆ㔞ࡶከࡃ࡞ࡿ⪃࠼ࡽࢀ㸪࠶ࡿ⛬ᗘ
ࡁ࡞⢏ᚄ࡛ࡶᾋ㐟◁࡞ࡗ࡚࠸ࡿྍ⬟ᛶࡀ࠶ࡿ㸬
࣭ᅇࡢほ ࡣὶ㔞ࡀ100m3/s⛬ᗘᑠつᶍ࡞ฟỈࢆᑐ
㇟ࡋ࡚࠸ࡿࡀ㸪ୖグࡢࡇᅜෆࡢࢆ㋃ࡲ࠼
ࡿ㸪つᶍ࡞ฟỈࡢほ ⤖ᯝࢆຍ࠼࡚㛵ಀᘧࢆస
10 100 1,000 10,000 100,000
10 100 1,000 10,000 100,000 ᐊෆศᯒ䛧䛯Ỉ䛾᥇Ỉ䛻 ᐃ䛧䛯 ⃮ᗘ䛛䜙䛾᥎ᐃ್SS䠄䟘/L䠅
⾲㠃᥇Ỉ䛧䛯⃮Ỉ䛾ᐊෆศᯒ⤖ᯝSS䠄䟘/L䠅 㻞䟚௨ୗ䛾ᅵ◁䛛䜙ᚓ䛯㛵ಀᘧ䛛䜙䛾᥎ᐃ್
㻜㻚㻜㻣㻡䟚௨ୗ䛾ᅵ◁䛛䜙ᚓ䛯㛵ಀᘧ䛛䜙䛾᥎ᐃ್
䜹䜸䝸䞁䠄ᖹᆒ⢏ᚄ㻜㻚㻢ȝm㸧䛛䜙ᚓ䛯㛵ಀᘧ䛛䜙䛾᥎ᐃ್
㻌 ᅗ࢟ࣕࣜࣈ࣮ࣞࢩ࡛ࣙࣥᚓࡓ⃮ᗘSSࡢ㛵ಀᘧࡼࡾồࡵ
ࡓSS᥎ᐃ್ࡢᐊෆศᯒ࡛ᚓࡓᐇ ್ࡢẚ㍑
㻜㻚㻜㻜㻜㻝 㻜㻚㻜㻜㻝 㻜㻚㻜㻝 㻜㻚㻝 㻝 㻝㻜
㻝㻜 㻝㻜㻜 㻝㻜㻜㻜 㻝㻜㻜㻜㻜
㻽㼟㻔㼙㻟㻛㼟㻕
㻽㻔㼙㻟㻛㼟㻕
ᅜෆ䛾ୗ㝈 ᅜෆ䛾ୖ㝈
᰿㇂ᕝ 㻽㼟㻩㻢㽢㻝㻜㻙㻢㻽㻞
㻽㼟㻩㻠㽢㻝㻜㻙㻤㻽㻞
㻽㼟㻩㻠㻚㻥㽢㻝㻜㻙㻣㻽㻞
㻌
ᅗ᰿㇂ᕝ࠾ࡅࡿᾋ㐟◁㔞ὶ㔞ࡢ㛵ಀ
㻌
┿᰿㇂ᕝὶᇦࡢᒣ⭡ࡢᵝᏊ㸦ᖹᡂᖺ᭶ᙳ㸧
ᡂࡍࡿ㸪᭦ᅵ◁㔞ࡀከࡃ࡞ࡿ⪃࠼ࡽࢀࡿ㸬
㸳㸬ࡲࡵᚋࡢㄢ㢟 ᚓࡽࢀࡓ▱ぢ
ᮏሗ࿌࡛ࡣ௨ୗࡢ㇟ࢆ☜ㄆࡍࡿࡇࡀ࡛ࡁࡓ㸬
࣭⃮ᗘィࢆ⏝࠸࡚ᾋ㐟◁㔞ࢆほ ࡍࡿ㝿ࡣ㸪◁ᕞሁ✚
ࡋࡓᅵ◁ࢆ⏝࠸ࡓ࢟ࣕࣜࣈ࣮ࣞࢩࣙࣥࡼࡿ⃮ᗘᾋ 㐟◁⃰ᗘࡢ㛵ಀᛶࡢᢕᥱࡣ㝈⏺ࡀ࠶ࡿࡓࡵ㸪ฟỈ
⾲㠃᥇Ỉࢆ⾜࠸ᙜヱἙᕝࡢ⃮ᗘᾋ㐟◁⃰ᗘࡢ 㛵ಀࢆᢕᥱࡍࡿࡇ࡛ࡼࡾᐇ⌧㇟㏆ࡃ࡞ࡿ㸬
࣭ฟỈࡢ⾲㠃᥇Ỉ࡛ᚓࡽࢀࡓ⃮Ỉ㸪ฟỈᚋἙ㐨ෆ ࡢ᳜⏕㝿࡛᪂ࡓሁ✚ࡋࡓᅵ◁ࡢ⢏ᗘ⤌ᡂࡣ⣽⢏ศࡀ 80㸣⛬ᗘ㢮ఝࡋ࡚࠸ࡿࡇࡽ㸪Ἑ㐨ෆࡢࢩࢼࢲࣞ
ࢫࢬ࣓࢞ࣖ➼ࡢ᳜≀ࡀᾋ㐟◁ࢆᤕᤊࡋ࡚◁ᕞୖࡢᅵ◁
ሁ✚ࢆಁ㐍ࡉࡏ࡚࠸ࡿ㸬
࣭᰿㇂ᕝࡢฟỈࡢᾋ㐟◁㔞ࡣᅜෆࡢἙᕝẚ࡚ࡸ
ࡸከ࠸ഴྥ࠶ࡿࡓࡵ㸪Ἑ㐨ࡢ⟶⌮➼ࢆ᳨ウࡍࡿୖ࡛
ᾋ㐟◁ࡶ↓ど࡛ࡁ࡞࠸㔜せ࡞せ⣲࡛࠶ࡿ㸬
࣭᰿㇂ᕝࡢᾋ㐟◁㔞ࡀᅜෆࡢἙᕝẚ࡚ከ࠸ഴྥ
࠶ࡿ⌮⏤ࡋ࡚ࡣ㸪ࢭࢢ࣓ࣥࢺ1࡛࠶ࡾᛴ໙㓄࡛ὶ㏿
ࡀ㏿ࡃᅵ◁ࢆᕳࡁୖࡆࡸࡍ࠸ࡇ㸪ὶᇦࡢᅵ㉁ࡀ
࣐ࢧᅵ࡛࠶ࡿࡇ㸪⌧ᅾ㸪◁㜵ሖሐᕤ➼ࡣ㐍ࢇ࡛࠸
ࡿࡀ〄ᆅࡶከ࠸ࡇࡶ୍ᅉ⪃࠼ࡽࢀࡿ㸬
ᚋࡢㄢ㢟
᰿㇂ᕝࡢἙᗋኚືண ࡢ⢭ᗘྥୖࡸ㐺ษ࡞Ἑ㐨⟶⌮
ྥࡅ㸪ᚋࡢㄢ㢟ࡋ࡚ࡣ௨ୗࡀᣲࡆࡽࢀࡿ㸬
࣭ᅇࡢᑐ㇟ฟỈࡣᖹᆒᖺ᭱ὶ㔞⛬ᗘ࡛࠶ࡾ㸪ᚋࡣ
ᖺᗘࡢㄪᰝὶ㔞ࢆୖᅇࡿฟỈࡶྠᵝࡢㄪᰝࢆ⾜
࠸㸪ᾋ㐟◁ືែࡀὥỈつᶍࡼࡾࡢ⛬ᗘ␗࡞ࡿࡢ
ࢆ☜ㄆࡍࡿᚲせࡀ࠶ࡿ㸬
࣭⌧ᅾࡢᾋ㐟◁ࡢほ ࡣ㸪ฟỈ⌧ᆅ࡛⾲㠃᥇Ỉࢆ
⾜ࡗ࡚࠸ࡿࡀ㸪ᑗ᮶ⓗࡣ᪂ᕝᶫタ⨨ࡋࡓ⃮ᗘィ
᪂ᕝᶫほ ᡤࡢࢹ࣮ࢱࡽ᥎ᐃ࡛ࡁࡿࡼ࠺㸪␗࡞ࡿつ ᶍࡢฟỈ⾲㠃᥇Ỉ➼ࢆᐇࡋ㸪⃮ᗘᾋ㐟◁⃰ᗘ ࡢ㛵ಀᛶ➼㸪᥎ᐃᚲせ࡞▱ぢࡢ⢭ᗘࢆྥୖࡉࡏࡿ㸬
᭦ᅇࡢ⃮ᗘィࡢ࢟ࣕࣜࣈ࣮ࣞࢩࣙࣥࡣ㸪2mm
0.075mmࡢࡩࡿ࠸ࢆ㏻㐣ࡋࡓ࡚ࡢᅵ◁ࢆ⏝࠸࡚⾜ࡗ
ࡓࡀ㸪ᚋࡣ⢏ᚄ༊ศูࡢヨᩱ࡛⾜࠺ࡇࡼࡾ㸪
࢟ࣕࣜࣈ࣮ࣞࢩ࡛ࣙࣥᚓࡽࢀࡓ㛵ಀᘧ⌧ᆅ⃮Ỉࡢ⢏
ᗘ⤌ᡂࢆ⏝࠸㸪SSࢆ᥎ᐃࡍࡿࡇࡀᚲせ⪃࠼ࡽࢀࡿ㸬
࣭つᶍᅵ◁⅏ᐖⓎ⏕ᚋࡢ㛵ಀࢆᢕᥱࡍࡿࡓࡵࡶ㸪 ὶᇦࡢ〄ᆅ㠃✚ࡢኚ࠶ࢃࡏ࡚ᾋ㐟◁㔞ࡶኚࡍࡿ
ྍ⬟ᛶࢆ㋃ࡲ࠼㸪〄ᆅࡀῶᑡࡋࡓᚋࡶᾋ㐟◁㔞ࢆほ 㸪᥎ᐃࡋ㸪ኚࢆㄪᰝࡍࡿࡇࡀ㔜せ࡛࠶ࡿ㸬
࣭᰿㇂ᕝࡣࢭࢢ࣓ࣥࢺ1࡛࠶ࡿࡇࡽ㸪ᤲὶ◁ࡶྵࡵ
ࡓ⢏ᚄࢆᑐ㇟ฟỈࡢືែࢆᢕᥱࡍࡿࡇࡀᚲせ
࡛࠶ࡿ㸬ࡑࡇ࡛㸪ᤲὶ◁ࡘ࠸࡚ࡣ㸪ᖹᡂ30ᖺ3᭶㸪 ᅜ⟶⌮༊㛫ୖὶ➃㏆࠶ࡿ㢌㤳ᕤ┤ୗ㸦4㹩800
㏆㸧㸪ᤲὶ◁㔞ࢆィ ࡍࡿࡓࡵࡢほ ᯠࢆタ⨨ࡋࡓ
ࡇࢁ࡛࠶ࡾ㸦┿㸧㸪ᚋࡣᮏほ ᯠࢆά⏝ࡋ࡚
ฟỈࡢᤲὶ◁㔞ࡸ⢏ᚄࢆᢕᥱࡋ࡚࠸ࡃ㸬
࣭ฟỈࡢἙᗋኚືࡼࡾỈ㠃ᙧࡶ⦪᩿ⓗኚࡍࡿࡓ
ࡵ㸪ฟỈࡢὶ◁㔞ࡢᢕᥱࡶ㸪Ỉ㠃ᙧࡢ⣔ิ
ࡢ⦪᩿ኚࢆほ ࡍࡿᚲせࡀ࠶ࡿࡀ㸪᰿㇂ᕝࡣỈほ ᆅⅬࡀ᪂ᕝᶫỈほ ᡤࡢࡳ࡞ࡗ࡚࠸ࡓ㸬ࡇࡢࡓ
ࡵ㸪ᖹᡂ30ᖺ3᭶㸪ᅜ⟶⌮༊㛫ࡢୗὶ➃㸦0㹩200
㏆㸧ୖὶ➃㸦4㹩900㏆㸧⡆᫆Ỉィ㸦࣐ࢡࣟ
ࢲࣂ࣮ 20m㸧ࢆタ⨨ࡋࡓ㸬ᚋࡣ⣔ิࡢほ Ỉ 㠃ᙧࡶ᪤▱ࡋ࡚Ἑᗋኚືண ࡢ⢭ᗘࢆྥୖࡉࡏ㸪ฟ ỈࡢἙᗋᙧ≧ࡸἙᗋᮦᩱࡢኚ㸪ᅵ◁ὶ㏦㔞➼ࡢ
㇟ࢆ᥎ᐃࡍࡿࡇࡼࡾ㸪Ỉࡸ⎔ቃࡢഃ㠃࠾ࡅࡿ
Ἑ㐨⟶⌮ά⏝ࡍࡿ㸬
ཧ⪃ᩥ⊩
1)ᒸᮏᩔ㸪ෆ⏣ኴ㑻㸪㕥ᮌᣅ㑻㸸ᒣᆅἙ㐨࠾ࡅࡿὶ◁Ỉᩥほ ࡢᡭᘬࡁ㸪ᅜ⥲◊㈨ᩱ➨686ྕ㸪2012.
2)ⵦཎ₶୍㸪ෆ⏣ኴ㑻㸪ᯘ┿୍㑻㸪▮㒊ᾈつ㸪Ώ㑓ዲ㸪Ỉᇉ ⱱ㸸ᒣᆅἙ㐨ࡢὶ◁Ỉᩥほ ࠾ࡅࡿ⃮ᗘィほ ᐇ࣐ࢽࣗ
ࣝ()㸪ᅜ⥲◊㈨ᩱ ➨792㸪2016.
3)ᶓᒣⱥ㸸⃮ᗘィࡢ⢏ᚄ౫Ꮡ≉ᛶ⌧ᆅ⏝᪉ἲ㛵ࡍࡿ⪃
ᐹ㸪ᅵᮌᏛㄽᩥ㞟㸪No698㸪pp93-98㸪2002.2.
4)ᮎḟᛅྖ㸪᪥ୗ㒊㝯㸪ᆤ㔝⪽Ꮚ㸸ᅵ◁⟶⌮⟇ࡢࡓࡵࡢ
࣮࢟ࣀ࣮ࢺ㸪ᅜ⥲◊㈨ᩱ ➨231㸪2005.
5)୰ᆤᏕஅ㸸Ἑᕝỏ℃ཎ࠾ࡅࡿࢿ⛉ᖐⲡᮏࡢᐃ╔ࡑࡢ ᙳ㡪㸪ಖ⏕ែᏛ◊✲㸪Vol.2㸪pp179-187㸪1997.
6)⏣ᮧᆂྖ㸪ஂಖṇ㸪ෆ⏣ኴ㑻㸪Ỉᒣ㧗ஂ㸪ᑠᮡ㈼୍㑻㸪ᑠ Ⳣᑚከ㸪Ọ⏣ⴥᏊ㸸භ⏥ᒣ⣔࠾ࡅࡿ⃮ᗘィᾋ㐟◁ほ 㸪 ᖹᡂ27ᖺᗘ◁㜵Ꮫ◊✲Ⓨ⾲ᴫせ㞟㸪B22-B23㸪2015.
7)ᒸᮏᩔ㸪ෆ⏣ኴ㑻㸪ᯘ┿୍㑻㸪ᮌୗ⠜ᙪ㸪Ỉᇉ㸪ྜྷᮧᬸஓ㸪 ᑠⳢᑚከ㸸ᒣᆅἙ㐨࠾ࡅࡿ⃮ᗘィࢆ⏝࠸ࡓὶ◁ほ ࡢㄢ㢟
ᑐᛂ㸪ᖹᡂ25ᖺᗘ◁㜵Ꮫ◊✲Ⓨ⾲ᴫせ㞟㸪R1-11㸪 2013.
8)ᅵᮌᏛ⦅: Ỉ⌮බᘧ㞟࠙ᖹᡂ11ᖺ∧ࠚ㸪㹮170㸪ၿ㸪 1999.
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┿㢌㤳ᕤ┤ୗタ⨨ࡋࡓᤲὶ◁ほ ᯠ㸦4㹩800㏆㸧
