Solutions for raw water intake during the dry season
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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. 2010 2017

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Solutions for raw water intake during the dry season

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Solutions for raw water intake during the dry season

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


Introduction characteristics of the treatment facility in pontianak

  • 20102017

  • 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

Introduction: characteristics of the treatment facility in Pontianak

Ambition


Technical problems during the dry season

(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


New transport pipe to penepat

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)


A sustainable solution for the future

A sustainable solution for the future?


Short term long term

Short term / Long term


Scope of solutions

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


Stop sea water from entering the river system

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)


A fresh water reservoir

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.


Flushing the kapuas kecil in the dry season

Flushing the Kapuas Kecil in the dry season

Construct a bypass in the river near Sukalanting (not as simple as it looks like)


Criteria f easibility

Criteria  Feasibility


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