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Tubig:Kinabuhi Water is Life.

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Presentation on theme: "Tubig:Kinabuhi Water is Life."— Presentation transcript:

1 Tubig:Kinabuhi Water is Life

2 Tamugan Surface Water Development Project

3 Outline Background Looming Water Crisis Why Surface Water
Why Tamugan River Conflict between Power and Water Projects DCWD Position

4 Background UN Secretary General Ban Ki-moon
“. . .put the looming crisis over water shortages at the top of the global agenda this year and take action to prevent conflicts over scarce supplies.”

5 NATIONAL WATER RESOURCES BOARD
Background NATIONAL WATER RESOURCES BOARD NWRB says. . . “Davao City is one of the nine water-critical urbanized areas in the Philippines where water is consumed intensively.”

6 Is there a looming water crisis?
YES!

7 Water Demand and Groundwater Potential in Selected 9 Major Urban Areas
Major City Exploitable Groundwater (MCM/ year) Water Demand (MCM/year) Ratio of Demand in 2025 to Demand in 1995 1995 2025 Metro Manila 191 1,068 2,883 2.7 Metro Cebu 60 59 342 5.8 Davao City 84 50 153 3.1 Baguio City 15 12 87 7.3 Angeles City 137 11 31 2.8 Bacolod City 103 37 111 3.0 Iloilo City 80 9 47 5.2 Cagayan de Oro City 34 29 98 3.4 Zamboanga City 54 28 203 Source: Master Plan Study on Water Resources Management in the Philippines: Final Report National Water Resources Board (NWRB), August 1998

8 Projected residual volume of GW in the Talomo-Lipadas Watershed
YEAR GWR (MLD)‏ GWU (MLD)‏ RESIDUAL (MLD)‏ 1997 280.5 134.61 145.8 2001 163.68 116.82 2005 199.03 81.47 2009 242.03 38.47 2013 294.30 -13.80 2017 357.87 -77.37 2011 0.0 Source: Asia-Geodyne Corporation, commissioned by DENR XI, MEIP and World Bank

9 Drop in Static Water Level
Upon Drilling 30 out of 43 Wells are Free-flowing 3.25 meters for 9 wells Sources: C. Lotti-LWUA Study and DCWD ECD and PD

10 Decline in Forest Cover
1987 – 6,170 hectares Source: State of Talomo-Lipadas Watershed: A Report, by PCEEM, 2006

11 Decline in Forest Cover
2002 – 2,593 hectares Source: State of Talomo-Lipadas Watershed: A Report, by PCEEM, 2006

12 Bases and Indicators of a Looming Water Crisis
NWRB Data (Water Demand and Groundwater Potential ) Asia-Geodyne Corporation, commissioned by DENR XI, MEIP and World Bank (Diminishing residual volume of GW) Decline in Static Water Level Decline in Forest Cover

13 According to the NWRB Study. . .
Groundwater sources in Angeles and Iloilo will be enough to meet water demand, but in other cities (including Davao). . . “certain surface water development measures might be required to secure sound socio-economic growths.” Source: Master Plan Study on Water Resources Management in the Philippines: Final Report National Water Resources Board (NWRB), August 1998

14 DCWD Water Sources Davao City WD derives more than 99% of its water from groundwater sources. . . . . . less than 1% from surface water.

15 NWRB Permit In May 1997, NWRB issued a water permit to DCWD to use water from Tamugan River with the diversion point at Upper Baguio, Baguio District. NWRB Water Permit No Wet Season = cms Dry Season = cms

16 Why Surface Water? Expand Service Coverage
Improve pressure and volume of existing DCWD water consumers Save on power cost Avoid depletion of groundwater Address increased demand for water which cannot be supplied by groundwater

17 Levels of Water Service
48 34 62 23 86 45 115 113 90 59 97 27 74 11 13 12 53 6 10 33 9 40 5 102 18 19 79 Poblacion 51 28 37 71 57 17 92 44 103 52 110 80 15 54 32 21 111 179 68 55 160 70 85 81 106 50 83 24 105 117 30 16 101 78 65 1 43 60 20 75 46 77 14 95 66 98 8 64 158 73 25 76 99 3 7 164 159 167 172 161 35 88 69 63 94 107 87 31 67 56 82 84 61 58 175 173 96 42 49 168 39 36 108 26 22 116 89 104 93 38 91 114 100 41 29 4 109 47 162 112 Agdao 177 72 Level I Level II Level II and III Level III (DCWD) Total barangays = 182 Served (Level III) = 106 (58%) Unserved = 76 Sources: City Planning and Development Office Davao City Water District

18 Expand Coverage Area 17 92 44 103 52 110 80 15 54 32 21 111 179 68 55 160 70 85 81 106 50 83 24 105 117 30 16 101 78 65 1 43 60 20 75 46 77 14 95 66 98 8 64 158 73 25 76 99 3 7 164 159 167 172 161 35 88 69 63 94 107 87 31 67 56 82 84 61 58 175 173 96 42 49 168 39 36 108 26 22 116 89 104 93 38 91 114 100 41 29 4 109 47 162 48 34 62 23 86 45 51 115 113 90 59 97 27 74 177 28 112 37 11 13 12 53 6 10 33 9 40 5 102 18 72 71 57 19 79 Poblacion Agdao New Water Service Connections to 30,000 households or a population of 150,000 Improve quantity and pressure of existing 160,000 connections or population of 800,000 Unserved barangays Barangays to be served by TSWD Barangays served by existing water service

19 Surface Water Development
Groundwater extraction is power-intensive . . . DCWD spends. . . PhP211 million/year for electricity. . . expected to increase to as much as PhP314 million in 5 years.

20 Why Tamugan River? Enough quantity Acceptable quality
IT IS THE ONLY RIVER in Davao City VIABLE and SUITABLE for DRINKING WATER

21 DAVAO CITY WATER SUPPLY PROJECT FEASIBILITY STUDY--July 2000, by NJS Consultants and CEST Inc.
SURFACE WATER ASSESSMENT Lipadas River - has a superior water quality, however, the flow rate is relatively small Talomo River – contamination risk is high, reduced quantity due to hydropower plants Davao River - highly turbid, operational costs will be very high. Tagulaya and Sibulan River - rivers are outside the boundaries of Davao City. Tamugan and Panigan River - Large flow rates make these rivers desirable as water source. Water quality analysis conducted yield satisfactory results.

22 DAVAO CITY WATER SUPPLY PROJECT FEASIBILITY STUDY--July 2000, by NJS Consultants and CEST Inc.
RECOMMENDED SURFACE WATER SOURCE Among the five bodies of water investigated, Tagulaya and Tamugan Rivers are found to be most desirable as water source for the entire Davao City. A Water Source Comparison Matrix is the result of the further investigation conducted by the Consultants. Criteria Tamugan River Tagulaya River Location Inside Davao City Outside Davao City Water Quality Satisfactory Watershed Management Directly put under the city government Security and watershed protection will not be controlled by the City River Slope and Terrain around the intake Gentle slope and wide river bed Steep slope & narrow river bed (no space for construction of intake & transmission pipe) Based from the above evaluation of the Consultants, TAMUGAN RIVER IS THE RECOMMENDED WATER SOURCE.

23 Classification of Rivers
Class AA Public Water Supply Class I (for water having watersheds which are uninhabited and otherwise protected and which require only approved disinfection in order to meet the National Standards for Drinking Water of the Phils. Class A Public Water Supply Class II (for source of water supply that will require complete treatment Class B Recreational water (for primary contact recreation such as bathing, swimming and skin diving) Class C Fishery water for the propagation and growth of fish and aquatic Class D For agriculture, irrigation and livestock watering Industrial water supply Source: DENR DAO 34 series of 1990

24 Water Quality Monitoring (Rivers Classified)
Davao del Norte Comval Prov. Davao Oriental Davao City Davao del Sur Davao del Norte 4 rivers classified Hijo (Class C) Tagum (Class D) Tuganay (Class B) Saug (Class B) ComVal 4 rivers classified Agusan (C) Kingking (C) Naboc (C) Matiao (C) Davao City 7 rivers classified -Bunawan (C) Davao (A & B) Ilang (C) Lasang (B) Lipadas (AA,A,) Talomo (B) Tamugan (A) Davao Oriental 6 rivers classified Sumlog (A,B,C) Baganga-Mahan-ub (AA, A & B)) Bitanagan (Class B) Cateel (Class A) Dapnan (Class A) Manurigao (Class A) Davao del Sur 5 rivers classified Digos (B & C) Malita (B) Padada (D) Sibulan (A & B) Mainit (B) Davao Gulf all classified SB Water Quality Monitoring (Rivers Classified) (as of CY 2007): 26 & 1 DG Source: DENR XI

25 The Tamugan Surface Water Development (TSWD) Project
Water Treatment Plant Infiltration Gallery

26 Barangays that will benefit from the Surface Water Project
District Pop. District Pop. Acacia 6,677 Bunawan 28,695 Callawa 1,784 Gatungan 434 Indangan 14,658 Lasang 11,297 Mahayag 1,517 Mandug 10,833 Mudiang 1,794 Tibungco 14,987 Tigatto 3,725 Sub-total 96,401 Biao Escuela 470 Biao Joaquin 425 Calinan 28,176 Gumalang 286 Lacson 1,455 New Valencia 1,340 Riverside 23,503 Talomo River 2,919 Talandang 1,302 Sub-total 59,876 Grand Total 156,277

27 The Conflict between DCWD and Hedcor Projects
Hedcor’s project will threaten the city’s limited water supply

28 Impact of Hedcor Project on DCWD TSWD
Hedcor Weir Elev. 537masl Elev. 745masl Proposed HEDCOR Conveyance Line Junction Box Location @ Elevation MAMSL Proposed HEDCOR Pondage Elev. = MAMSL 20MW Power plant Talomo Diversion Weir Elev. 765masl Intake Weir Elev. 536masl DCWD Water Treatment Plant Elev. 325masl DCWD Infiltration Gallery Elev. 400masl Tamugan River Kidale River Panigan River Operations of Hedcor will affect availability of water for DCWD resulting to dependency of DCWD on Hedcor Savings of DCWD on power may be used by other power users DCWD has no other surface water source

29 DCWD Water Treatment Plant DCWD Infiltration Gallery
Hedcor’s Proposal DCWD Water Treatment Plant Elev. 325masl Hedcor Weir Elev. 537masl Elev. 745masl Proposed HEDCOR Conveyance Line Junction Box Location @ Elevation MAMSL Proposed HEDCOR Pondage Elev. = MAMSL 20MW Power plant Talomo Diversion Weir Elev. 765masl Intake Weir Elev. 536masl DCWD Infiltration Gallery Elev. 400masl Tamugan River Kidale River Panigan River Why Proposal is not acceptable? DCWD not after the penalty but reliable and continuous water supply If Hedcor cannot pump due to maintenance problem, DCWD will not be able to supply water DCWD will be dependent on Hedcor Hedcor build pumping station and pipeline to DCWD WTP at elev. 325 If water at 400masl is less than 4cms, Hedcor will pump shortfall to DCWD WTP If Hedcor fails to pump, it will be penalized at DCWD selling rate Conditions be stipulated in MOA, ECC, and water permit

30 Effect of Hedcor Project to Groundwater Sources
“The modeling results indicate that a large component of the recharge occurs along the Talomo River” Isabelle M. Proulx, Talomo-Lipadas Watershed Aquifer Characterization Study: 3D Aquifer Model, PCEEM Mission Report, February 2002

31 Source: Terrain Analysis
July 2005 Mines and Geosciences Bureau-XI

32 Effect of Hedcor Hydropower Project on Groundwater Resources
20MW Power plant Tamugan River Kidale River Hedcor Weir Elev. 537masl Intake Weir Elev. 536masl Talomo River Panigan River Hedcor Weir Elev. 745masl Talomo Diversion Weir Elev. 765masl Affects the very high recharge potential for deep to very deep aquifer Affects groundwater resources

33 Effect of Hedcor Project to Groundwater Sources
Dumoy Recharge Composition Davao River (20%) Rivers60% Rain 40% Source: “ACCESS TO CLEAN DRINKING WATER”, United Nation Development Project (UNDP)/International Atomic Energy Agency (IAEA)/Regional Cooperative Agreement (RCA) Project Talomo River 80%

34 Long-term effect of Hedcor’s Project
Groundwater depletion Land subsidence Salinity Intrusion High pumping cost

35 SPARE TAMUGAN! DCWD Position
Hedcor’s Hydropower plant will threaten Davao City’s present and future water supply. DCWD strongly urges that Hedcor would relocate its hydropower in other rivers. SPARE TAMUGAN!

36 The Impending Water Shortage and its Solution (cont’d.)
“Because of the critical role of Tamugan River to the health of Davao City residents and to the development of Davao City, it is also important to declare Tamugan River as a single purpose river, that is, solely as the source of water supply for Davao City”. Conducted by PCEEM, MGB and Asia Geodyne Corporation Dr. ED. B. PRANTILLA *USEP-SAEC and RECORD Foundation 36 3/31/2017

37 Good Day


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