1 salinisation of the kapuas delta solutions for raw water intake during the dry season -...
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1Salinisation of the Kapuas Delta
Solutions for raw water intake during the dry season
- Introduction- Current situation- Long term & Short term Solutions- Criteria
Imput from:Cipta Karya (Province): Pak Angiat BWSK: Pak SapriPak Masryatno (former technical director)PDAM Kota Pontianak
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2Salinisation of the Kapuas Delta
Introduction: characteristics of the treatment facility in Pontianak
2010 2017- Drinking water demand: 1,068 m3/s 1,769 m3/s - Production capacity 1,21 m3/s 1,51 m3/s- Production capacity in the dry season: 300 l/s 1300 l/s- Costumers coverage: 60% 90%- Population growth: 2,74 %/year 2,74 %/year
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3Salinisation of the Kapuas Delta
(Technical) Problems during the dry season
- During the extreme events of 1997 and 2002 (resp. 110 and 80 days) the pipe to Penepat (24 km upstream) was only 20-30% of the time operational due to:
- Lack of fuel
- Mechanical failure of the pumps
- Leakage of the transport pipe
- Beside these problems there is a capacity deficit of approx.
900 l/s
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4Salinisation of the Kapuas Delta
New transport pipe to Penepat- New transport pipe to Penepat (under construction)
Capacity: - Current Pipe (d=600 mm) = 300 l/s (v = 1 m/s)
- New Pipe (d=800) = 500 l/s (v = 1 m/s) - In Holland the transport velocity of 1 m/s is normal)
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5Salinisation of the Kapuas Delta
A sustainable solution for the future?
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6Salinisation of the Kapuas Delta
Short term / Long term
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7Salinisation of the Kapuas Delta
Scope of solutionsShort term-Intake further upstream-Optimise capacity WTPs and decrease leakage-Update Penepat intake, including reservoir or extend pipeline to Biyung
Long term-Blocking salt water from the sea-Create fresh water reservoir for the dry period-Flushing KK by constructing canal Sukalanting
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8Salinisation of the Kapuas Delta
Stop sea water from entering the river system
Construct a dam, must be able toRegulate river dischargePass the ships
It depends on the functional requirements
Location: River mouth (Jungkat) or Ambawang (idea of Prof. Arwin)
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9Salinisation of the Kapuas Delta
A fresh water reservoir1.26 m3/s = 150,000 m3/day (in combination with Penepat)Dry season = 110 days
Reservoir: 12,000,000 m3
When you fill it up to two meters you need an area of approx. 600 ha.
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10Salinisation of the Kapuas Delta
Flushing the Kapuas Kecil in the dry season
- Construct a bypass in the river near Sukalanting (not as simple as it looks like)
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11Salinisation of the Kapuas Delta
Criteria Feasibility