1 CTI Engineering Internationa Co., Ltd. Nippon Koei Co., Ltd THE
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1 CTI Engineering Internationa Co., Ltd. Nippon Koei Co., Ltd THE
THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA 図 6.1 カビテ州による新固形廃棄物処理計画における 最終処分地と中継基地(RMF)決定地 CTI Engineering Internationa Co., Ltd. Nippon Koei Co., Ltd F-6-1 40 Longitudinal Profile of Imus River (Existing) Elevation (m in MSL) 25 20 15 AnabuDam NIA Canal National Rd. Bridge 30 Aguinaldo Highway 35 10 5 Deepest Riverbed Mean Riverbed Left Bank Right Bank 0 -5 Riverbed Slope -10 0 2000 4000 6000 8000 Distance from Rivermouth (m) 10000 12000 14000 200 Channel Width of Imus River (Existing) AnabuDam NIA Canal 150 50 Steep River Gradient Gentle River Gradient 0 Aguinaldo Highway 50 National Rd. Br. Width (m in total) 100 100 150 Width if River Channel 200 0 2000 4000 6000 8000 Distance from Rivermouth (m) THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd. 10000 12000 図 8.1 ローランドエリアのImus川現況縦断・ 河道幅図 F-8-1 14000 40.000 15.000 10.000 5.000 0.000 -5.000 Imus River Sta.8+930 Bridge (EL+32.2) 20.000 Sta.4+850 Julian Bridge (EL+16.6) 25.000 Bucandala Dam Elevation (m in MSL) 30.000 Sta.4+520 Bridge (EL+13.6) Sta.0+450 Bridge (EL+4.6) 35.000 Sta.1+430 Bridge (EL+6.3) Sta.1+950 Bridge (EL+7.6) Longitudinal Profile of Julian River (Existing) Deepest Riverbed Mean Riverbed Left Bank Right Bank -10.000 0 2000 4000 6000 8000 Distance from Imus River (m) 10000 12000 200 Channel Width of Julian River (Existing) NIA Canal 150 Width (m in total) 100 50 0 50 100 Width of River Channel 150 Bridge & Dam 200 0 2000 4000 6000 8000 Distance from Rivermouth (m) THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd. 10000 図 8.2 ローランドエリアのJulian川現況縦断・ 河道幅図 F-8-2 12000 40 Deepest Riverbed Mean Riverbed Left Bank Right Bank 20 15 Aguinaldo H.W. Elevation (m in MSL) 25 Longitudinal Profile of Bacoor River (Existing) Panapaan Bridge 30 Bridge National Rd. Bridge 35 Steep SM Bacoor 10 Flat 5 0 -5 Fish Pond Sub-Division -10 0 1000 2000 3000 4000 5000 Distance from Rivermouth (m) 6000 7000 8000 200 Channel Width of Bacoor River (Existing) 150 Fishpond Area Elevation (m in MSL) 100 Aguinaldo Highway Subdivision 50 0 SM Bacoor 50 100 Width if River Channel 150 : Main Bridge 200 0 1000 2000 3000 4000 5000 6000 7000 Distance from Rivermouth (m) THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd. 図 8.3 ローランドエリアのBacoor川現況縦断・ 河道幅図 F-8-3 8000 40.000 Longitudinal Profile of San Juan River (Existing) 35.000 Novereta Diversion Br. Novereta Br. Ylang-Ylang Br. 30.000 15.000 10.000 Flat Steep 5.000 0.000 NIA Canal 20.000 Bayan Dam Elevation (m in MSL) 25.000 Deepest Riverbed Mean Riverbed Left Bank Right Bank Left Dike Right Dike Flat -5.000 Merging with Ylang-Ylang River -10.000 0 2000 4000 6000 8000 10000 Distance from Rivermouth (m) 12000 14000 16000 50 Width of River Channel Ylang-Ylang River 0 50 100 150 NIA Canal Bayan Dam Width (m in total) 100 Channel Width of San Juan River (Existing) Ylang-Ylang Br. 150 Novereta Br. Novereta Diversion Br. 200 200 0 2000 4000 6000 8000 10000 12000 14000 16000 Distance from Rivermouth (m) THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd. 図 8.4 ローランドエリアのSan Juan川現況縦断・ 河道幅図 F-8-4 40.000 Longitudinal Profile of San Juan - Ylang-Ylang River (Existing) Novereta Diversion Br. Novereta Br. Ylang-Ylang Br. 30.000 Elevation (m in MSL) 25.000 20.000 15.000 10.000 Deepest Riverbed Mean Riverbed Left Bank Right Bank Left Dike Right Dike NIA Canal 35.000 Steep 5.000 0.000 Flat -5.000 Merging with San Juan River -10.000 0 2000 4000 6000 8000 10000 Distance from Rivermouth (m) 12000 14000 16000 Width (m in total) 100 50 Channel Width of San Juan - Ylang-Ylang River (Existing) Ylang-Ylang Br. 150 Novereta Br. Novereta Diversion Br. 200 Width if River Channel 0 50 San Juan River Ylang-Ylang River 150 NIA Canal San Juan River 100 200 0 2000 4000 6000 8000 10000 Distance from Rivermouth (m) THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd. 12000 14000 16000 図 8.5 ローランドエリアのYlang-Ylang川現況縦断・ 河道幅図 F-8-5 Deepest Riverbed 40 Left Bank 35 Right Bank Left Dike 30 Right Dike Road Surface Elevation along Left Bank 25 Road Surface Elevation along Left Bank Tejero Br. 20 15 Flat NIA Canal Elevation (m in MSL) Longitudinal Profile of Canas River (Existing) Mean Riverbed 10 Steep Plucena Dam 5 0 Flat -5 -10 0 1000 2000 3000 4000 5000 6000 Distance from Rivermouth (m) 7000 8000 9000 10000 200 Channel Width of Canas River (Existing) Tejero Br. 150 50 0 50 Plucena Dam 100 150 Width if River Channel 200 0 1000 2000 3000 4000 5000 6000 Distance from Rivermouth (m) THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd. NIA Canal Width (m in total) 100 7000 8000 9000 図 8.6 ローランドエリアのCanas川現況縦断・ 河道幅図 F-8-6 10000 THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd F-8-7 図 8.7 下流低平地における 20 年確率河川洪水 防御のために河川改修が必要な区間 THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd F-8-8 図 8.8 遊水地及び内水調整池の配置可能候補地 Design Discharge (m3/s) w/ on-site w/o on-site 2-year 5-year 10-year 20-year THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd 0 200 430 670 Fig. 8.9 San Juan 放水路線形案 F-8-9 60 270 480 700 THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd 図 8.10 F - 8 - 10 海岸堤と防潮ゲートによる完全 2 年確率 内水排除対応施設配置図 (Alternative D-1: Full Protection) THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd 図 8.11 F - 8 - 11 輪中堤と防潮ゲートによる完全 2 年確率 内水排除対応施設配置図 (Alternative D-2: Full Protection) THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd 図 8.12 海岸堤と防潮ゲートによる浸水許容 2 年確率 内水排除対応施設配置図 (Alternative D-1: Partial Protection) F - 8 - 12 THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd 図 8.13 輪中堤と防潮ゲートによる浸水許容 2 年確率 内水排除対応施設配置図 (Alternative D-2: Partial Protection) F - 8 - 13 Daan Bukid Creek Retarding Basin Habay Bridge 8d Palico Bridge 8 8u 7 7u Bacoor River Muntino Bridge Triburary 9u Island Cove Bridge NIA Canal Triburary Banalo Bridge 9 10 Balsahan Bridge Anabu Dam Imus Bridge 6 2 1d 1 Taclong II Bridge 4 Imus River Bacoor Bay 3-2 4u Bucandala Dam 5 3-1 3 Julian River 5u Triburary Point No. 1 1d 2 3 3-1 3-2 4u 4 5u 5 6 7u 7 8u 8 8d 9u 9 10 2-year 310 190 280 130 170 100 110 85 30 15 350 80 25 75 50 35 65 50 370 Peak Discharge for Each Return Period (m3/s) without On-Site with On-Site F_I.2 F_I.3 5-year 10-year 20-year 2-year 5-year 10-year 430 500 600 250 350 430 250 280 350 160 210 250 380 440 520 230 320 390 160 170 190 90 120 140 180 180 180 150 180 180 130 140 140 70 110 130 130 140 150 70 110 130 120 130 130 55 95 120 35 35 35 25 35 35 15 15 15 15 15 15 450 520 540 290 400 470 100 110 130 70 90 100 45 55 60 20 40 50 75 75 75 70 75 75 50 50 50 50 50 50 45 55 60 35 45 50 65 65 75 65 65 65 75 95 110 50 70 80 450 520 560 320 400 470 THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co.,Ltd. Nippon Koei Co., Ltd 20-year 550 300 470 160 180 140 140 130 35 15 530 120 60 75 50 55 70 100 550 図 8.14 Imus川流域確率規模別河川洪水対策設計流量 (マスタープラン F_I.2/I.3 : 河川部分改修 +遊水地案) F - 8 - 14 Retarding Basin NIA Canal Pasong Kastila Dam Ylang-Ylang River Bacoor Bay 3d Panamitan Bridge 3 Panamitan River San Juan Bridge Ilang-Ilang Bridge 4u Bayan Dam 4 Diversion 6 5 2 Diversion point Point No. 1 1d 2 3 3d 4u 4 5 6 2-year 160 120 180 270 200 220 170 330 330 1d 1 San Juan River Peak Discharge for Each Return Period (m3/s) without On-Site with On-Site F_S.2 F_S.5R 5-year 10-year 20-year 2-year 5-year 10-year 230 350 470 130 220 340 130 140 160 120 130 140 240 270 300 170 230 260 370 490 620 220 300 430 220 250 320 190 210 240 260 290 350 200 240 280 210 260 350 170 200 240 420 485 610 310 410 460 420 485 610 310 410 460 THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co.,Ltd. Nippon Koei Co., Ltd 20-year 460 160 290 580 300 330 330 580 580 図 8.15 San Juan川流域確率規模別河川洪水対策設計 流量(マスタープラン F_S.2: 河川部分改修 +遊水地案) F - 8 - 15 NIA Canal Pasong Kastila Dam Ylang-Ylang River Bacoor Bay 3 Panamitan Bridge Panamitan River San Juan Bridge Ilang-Ilang Bridge Bayan Dam 4 Diversion 6 5 2 Diversion point 7 1 San Juan River Proposed Diversion Channel Point No. 1 2 3 4 5 6 7 2-year 160 220 270 280 350 350 60 Peak Discharge for Each Return Period (m3/s) without On-Site with On-Site F_S.3 F_S.5D 5-year 10-year 20-year 2-year 5-year 10-year 230 350 470 130 220 340 340 460 600 190 320 450 370 490 620 215 300 425 390 510 640 220 330 460 400 400 400 340 400 400 400 400 400 340 400 400 270 480 700 0 200 430 THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co.,Ltd. Nippon Koei Co., Ltd 20-year 460 580 580 600 400 400 670 図 8.16 San Juan川流域確率規模別河川洪水対策設計 流量(マスタープラン F_S.3:河川部分改修+ 放水路案) F - 8 - 16 Retarding Basin NIA Canal Pasong Kastila Dam Ylang-Ylang River Bacoor Bay 3d Panamitan Bridge 3 Panamitan River San Juan Bridge Ilang-Ilang Bridge 4u Bayan Dam 4 Diversion 6 5 2 Diversion point 7 1 1 San Juan River Proposed Diversion Channel Point No. 1 1d 2 3 3d 4u 4 5 6 7 2-year 160 150 170 270 260 270 260 350 350 40 Peak Discharge for Each Return Period (m3/s) with On-Site without On-Site F_S.4wo F_S.4with 5-year 10-year 20-year 2-year 5-year 10-year 230 350 470 130 220 340 210 250 270 120 190 240 320 370 390 170 290 370 370 490 620 220 300 430 350 410 450 190 290 380 370 440 480 200 320 400 330 390 420 190 280 360 400 400 400 320 400 400 400 400 400 320 400 400 200 250 300 0 150 250 THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co.,Ltd. Nippon Koei Co., Ltd 20-year 460 260 390 580 440 470 410 400 400 300 図 8.17 San Juan川流域確率規模別河川洪水対策設計 流量(マスタープラン F_S.4:河川部分改修+ 遊水地+放水路案) F - 8 - 17 THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd 図 8.18 内水流域 2 年確率各排水路設計流量(マスター プラン D1(完全排水案)及び D2(浸水許容案) F - 8 - 18 Longitudinal Profile of Imus River (Improvement Plan) 35 30 15 10 National Rd. Br. Bacoor River Elevation (m in MSL) 25 20 1 / 25 0 Aguinaldo Highway Deepest Riverbed Left Bank Right Bank Design High Water Level Design Dike Level Design Riverbed EL+2.40m (Sta.4+000) EL+28.5 EL+25.4m (Sta.12+000) AnabuDam NIA Canal 40 1/ 2 50 EL+0.8m 5 1 / 75 0 0 1 / 2,5 00 -5 -10 0 2000 4000 6000 8000 10000 12000 14000 Distance from Rivermouth (m) Aguinaldo H.W. Panapaan Bridge Bridge 10 Elevation (m in MSL) Longitudinal Profile of Bacoor River (Applicable Max. Improvement Plan) National Rd. Bridge 15 Steep SM Bacoor 5 Flat 0 Deepest Riverbed Left Bank Right Bank Fish Pond -5 Sub-Division Design H.W.L. Design Dike Level Design Riverbed -10 0 1000 2000 3000 4000 5000 6000 7000 8000 Distance from Rivermouth (m) Longitudinal Profile of Julian River (Plan) 20.000 15.000 10.000 Bucandala Dam 5.000 Sta.8+930 Bridge (EL+32.2) Elevation (m in MSL) 25.000 Sta.4+850 Julian Bridge (EL+16.6) 30.000 Sta.4+520 Bridge (EL+13.6) Sta.0+450 Bridge (EL+4.6) 35.000 Sta.1+430 Bridge (EL+6.3) Sta.1+950 Bridge (EL+7.6) 40.000 0.000 -5.000 Deepest Riverbed Left Bank Right Bank Design H.W.L. Design Dike Level Design Riverbed Imus River -10.000 0 2000 4000 6000 8000 10000 Distance from Imus River (m) THE STUDY ON 図 8.19 COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA Imus/Bacoor/Julian川計画縦断図 CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd. F - 8 - 19 12000 Standard Cross Section (Sta.0+000~Sta.2+000:Rivermouth to Binakayan Bridge):400m3/s (For All Alternatives) 4000 4000 1000 50,000~100,000 1:2 +1.73 H:B .0 H:B =1:2 .0 .0 .0 =1:3 5730 =1:3 .0 -4.00 =1:2 H:B H:B 2000 .0 1:2 30,000 (Typical) Raising of Existing Road Step Revetment Riprap Filling MSL+0.00 Dredging Existing Cross-Section Line Standard Cross-Section Line Standard Cross Section (Sta.2+000~Sta.3+200:Binakayan Bridge to Merging with Julian R.):400m3/s (For Partial Improvement: F_I.2 and F.I.3) 3000 3000 800 24,500 2000 (Typical) 5700~ ~6500 +1.73~3.84 2800 4000 Installation of Parapet Wall/Embankment when needed -4.0~-1.83 10,000 4000 2800 3+200 2+700 Basically No need to Improve No Need to Improve Installation of Parapet Wall/Embankment when needed D.H.W.L MSL+0.00 MSL+0.00 Existing Cross-Section Line Existing Cross-Section Line Standard Cross-Section Line Standard Cross-Section Line Typical Cross Section for Full-Scaled Improvement : 660, 810 and 970m3/s (For Partial Improvement: F_I.2 and F.I.3) 3+000 Installation of Parapet Wall/Embankment when needed Standard Cross-Section Line for 10-year return period with on-site Standard Cross-Section Line for 20-year return period with on-site Excavation/Dredging 30m for 5-year return period 35m for 10-year return period 40m for 20-year return period THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA 図 8.20 Imus川河道改修標準断面及び改修概念図 CTI Engineering International Co., Ltd Nippon Koei Co., Ltd F - 8 - 20 Standard Cross Section (Sta.0+000~Sta.3+000:Rivermouth to Fishpond Area: 100~135m3/s) 3,000 3,000 2500 600 1700 46,200 D.H.W.L 21,000 (Typical) 0+800 Standard Cross-Section Line Embankment Embankment Existing Cross-Section Line 2+800 Standard Cross-Section Line Embankment Embankment Excavation / Dredging Existing Cross-Section Line Standard Cross Section (Sta.4+000~Sta.5+000:SM Bacoor to Aguinaldo H.W.) For Partial Improvement Q=65m3/s For Full Scaled Improvement Q=125m3/s 3000 2800 15,000 D.H.W.L ~ 4158 D.H.W.L 2800 600 3000 600 3000 3000 36,800 (Typical) Partial Full Scaled 4+600 Installation of Parapet Wall / Embankment When needed Existing Cross-Section Line 4+600 Existing Cross-Section Line Steel Sheet Pile/Wet Stone Masonry Revetment Excavation / Dredging Excavation / Dredging THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA Standard Cross-Section Line 図 8.21 Bacoor川河道改修標準断面及び改修概念図 CTI Engineering International Co., Ltd Nippon Koei Co., Ltd F - 8 - 21 Standard Cross Section of Julian River : 2-year (140m3/s) (Partial) and 5-year return period (200m3/s) (Full Scaled) Sta.0+000-Sta.4+800(Bucandala Dam) 2-year return period : 140m3/s 5-year return period : 200m3/s 0.600 19.700 0.600 15.700 H.W.L .5 1:0 .5 1:0 2.500 2.100 .5 .5 9.000 1:0 1:0 2.000 2.000 2.500 2.100 H.W.L 2.000 13.000 2.000 Sta.4+800-Sta.8+000 Sta.8+000-Sta.10+000 0.600 0.600 0.600 .5 .5 3.500 1:0 .5 3.500 1:0 .5 8.000 H.W.L 1:0 6.000 .5 .5 .5 1:0 10.300 H.W.L 1:0 1:0 1:0 .5 H.W.L 3.500 H.W.L 5-year : 120m3/s 8.600 4.500 3.500 12.100 0.600 10.100 2-year : 90m3/s 1:0 5-year : 120m3/s 2-year : 90m3/s 6.000 1+400 2+200 Existing Cross-Section Line 2-year: No Improvement for Lower Channel with Dike of Upper Channel 5-year: Widening and Dike 2-year: No Improvement 5-year: Widening is required. H.W.L H.W.L Standard Cross-Section Line for 5-year return period Standard Cross-Section Line for 2-year return period 4+400 6+600 2-year: Widening / Dike 5-year: Widening / Dike 2-year: No Improvement 5-year: No Improvement H.W.L H.W.L THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA 図 8.22 Julian川河道改修標準断面及び改修概念図 CTI Engineering International Co., Ltd Nippon Koei Co., Ltd F - 8 - 22 20.000 15.000 EL+0.8m 10.000 EL+18.375 EL+20.643m (Sta.10+550) Ylang-Ylang Br. 25.000 Novereta Br. 30.000 Novereta Diversion Br. 35.000 1 /4 0 0 1/ 5 0 0 1 / 1 ,20 0 5.000 0.000 EL+5.8m (Sta.6+000) -5.000 Bayan Dam Elevation (m in MSL) Longitudinal Profile of San Juan River (For All Scaled River Improvement) Deepest Riverbed Left Bank Right Bank Desing H.W.L Desing Dike Level Design Riverbed NIA Canal 40.000 Merging with Ylang-Ylang River -10.000 0 2000 4000 6000 8000 10000 12000 14000 16000 Distance from Rivermouth (m) 40.000 Longitudinal Profile of San Juan - Ylang-Ylang River (Plan) 35.000 EL+30.444m (Sta.12+600) 15.000 10.000 NIA Canal 20.000 EL+6.00m (Sta.6+000) Ylang-Ylang Br. Elevation (m in MSL) 25.000 Novereta Br. Novereta Diversion Br. 30.000 1/270 1/1,000 5.000 Deepest Riverbed Left Bank 0.000 Right Bank Design H.W.L -5.000 EL+0.8m -10.000 0 2000 Design Dike Level Merging with San Juan River 4000 6000 Design Riverbed 8000 10000 12000 14000 16000 Distance from Rivermouth (m) THE STUDY ON 図 8.23 COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA San Juan/Ylang-Ylang River川計画縦断図 CTI Engineering International Co., Ltd. Nippon Koei Co., Ltd. F - 8 - 23 Standard Cross Section (Sta.0+000~Sta.1+700:Rivermouth Area : 400m 3/s) (For All Alternatives) 7.500 ~8.000 5.000 4.000 25.000 4.000 5.000 7.500 ~8.000 3.000 2.000 3,500 ~4,000 3.000 0+900 (Typical) Embankment Embankment Excavation/ Dredging Standard Cross Section (Sta.1+700~Sta.4+800:Brgy. Sta. Isabel~Merging P.) : 600, 810 and 1050m3/s (For : Full Scaled Improvement) (for 5-year return period) 43.000~45.000 3.000 2.000 4.367 3.000 3.000 4.000 25.000 4.000 3.000 2+300 (Typical) Excavation/Dredging Standard Cross-Section Line THE STUDY ON COMPREHENSIVE FLOOD MITIGATION FOR CAVITE LOWLAND AREA Standard Cross-Section Line for 20-year return period with on-site Standard Cross-Section Line for 10-year return period with on-site 図 8.24 San Juan川河道改修標準断面及び改修概念図 CTI Engineering International Co., Ltd Nippon Koei Co., Ltd F - 8 - 24