1 Salinisation 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 Sapri Pak Masryatno (former technical director) PDAM Kota Pontianak

2 Salinisation of the Kapuas Delta Introduction: characteristics of the treatment facility in Pontianak Drinking water demand: 1,068 m3/s1,769 m3/s - Production capacity1,21 m3/s1,51 m3/s - Production capacity in the dry season: 300 l/s1300 l/s - Costumers coverage: 60%90% - Population growth: 2,74 %/year2,74 %/year

3 Salinisation 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

4 Salinisation 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)

5 Salinisation of the Kapuas Delta A sustainable solution for the future?

6 Salinisation of the Kapuas Delta Short term / Long term

7 Salinisation of the Kapuas Delta Scope of solutions Short 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

8 Salinisation of the Kapuas Delta Stop sea water from entering the river system Construct a dam, must be able to Regulate river discharge Pass the ships It depends on the functional requirements Location: River mouth (Jungkat) or Ambawang (idea of Prof. Arwin)

9 Salinisation of the Kapuas Delta A fresh water reservoir 1.26 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.

10 Salinisation 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)

11 Salinisation of the Kapuas Delta Criteria Feasibility