JICAs Cooperation for Water Environment Improvement in Phnom Penh - - PowerPoint PPT Presentation

JICA’s Cooperation for Water Environment Improvement in Phnom Penh

November 29, 2018 Masashi Nishikawa Project Formulation Advisor JICA Cambodia Office

Contents

• What is JICA?
• JICA’s cooperation for Drainage Facilities
• Current Issues
• JICA’s current cooperation

2

What is JICA?

3

• 1. Support for Industrial Development

4

• 2. Improvement of Quality of Life
• 3. Realization of Sustainable Society through

Strengthening of Governance

JICA’s Priority Area in Cambodia

5

Long – term Commitment

Infrastructure

Quality infrastructure

Capacity Development

Development of Master Plan Human Resource Dev.t Technical Assistance

Holistic Assistance

JICA’s Approach

Drainage/Sewerage Improvement in Phnom Penh

2011 Flood Situation in Cambodia

Phnom Penh

Flood Situation in Central Phnom Penh (before project)

Note that the sky is blue (taking long time for water level to drop)

Phnom Penh Drainage & Sewerage

1998-1999 (DS) M/P Drainage Improvement and Flood Control 2002-2004 (GA) Flood Protection &Drainage Improvement (I) 2007-2010 (GA) Flood Protection &Drainage Improvement (II) 2011-2015 (GA) Flood Protection &Drainage Improvement (III) 2014-2016 (DS) M/P Sewerage & Drainage Improvement in PP 2018-2023(GA) Flood Protection & Drainage Improvement (IV) 2019- (GA) Sewerage Treatment Plant (Tentative) 2017-2020(JPP) Capacity Building of the O&M of Sewerage and Drainage System 2019-(TCP) Capacity Development for Sewerage Management

JICA’s Assistance for Drainage/Sewerage Sector

How to protect Phnom Penh from flooding of Mekong River System

• Riverbank

How to pump out the rain water as quickly as possible

• Drainage System
• Pumping Station

General Concept for Rain water/ Wastewater Discharge in PP.

11

Location Map For the Project for Flood Protection and Drainage Improvement in Phnom Penh Phase 1 - 4

Flood Protection &Drainage Improvement in PP (Phase I)

1. Improvement of Svay Pak Drainage Sluiceway 2. Improvement of Salang Drainage Channel in the Downstream: 0.887km 3. Construction of Salang Drainage Sluiceway 4. Improvement of Mean Chey Drainage Channel in the Downstream: 2.635km 5. Construction of Tum Nup Toek Drainage Sluiceway 6. Improvement of Tompun Inlet Channel: 1.02km 7. Construction of New Tompun Pumping Station: 15m3/sec 8. Reinforcement of Tompun Ring Dike: 4.34km

1. Improvement of two sections of Revetment along Tonle Sap River 2. Improvement of Wat Phnom Area Drainage System (DS), construction of

• ne Underground Reservoir (UR) and
• ne Pumping Station (PS)

3. Improvement of Central Market Area DS, Construction of one UR and one PS 4. Improvement of Royal Palace & National Museum Area DS, construction

• f two PS & two UR

5. Construction of Interceptor Pipe along Tonle Sap River Park

Flood Protection &Drainage Improvement in PP (Phase II)

Riverbank Enforcement and Underground Reservoir

Underground reservoir help to absorb sudden impact of rain water

Tonle Sap (River)

Basic Function of the Pumping Stn.

Looking from the Top

Waste Water (+Rain Water) from Town Underground Reservoir

(Reserve Water temporary to absorb impact of rain water) Screen Pit (collecting waste) Pump only during Rainy Season when river level is high Overflow when strong rain Normal Flow (to Trabek Pumping Stn,) Flow out naturally when river level is low Overflow when strong rain

Looking from the Side

River Level (Dry Season) River Level (Rainy Season)

Reserve Water when sudden strong rain Pump only during Rainy Season when river level is high

Pumping Stn Screen Pit

1. Improvement of Drainage Network in Ou Russei Area, Boeng Reang Area, Monireth Area, Toul Svay Prey Area, Tuol Sleng Area, Boeng Keng Kang Area, Toul Tumpung North Area, Toul Tumpung South Area 2. Reconstruction of Sediment Chamber 3. Procurement of two sets of Sludge Sucker and two sets of High Water- Jet Machine

Flood Protection &Drainage Improvement in PP (Phase III)

17

Drainage System for Phase III

18

Drainage System for Phase III

19

Before After

High Water-Jet Machine Sludge Sucker

Dangerous and Unhygienic

Sludge Sucker and High Water-Jet Machine

Before Project After Project

To be able to drain storm water (corresponding to a 2-year return period) with inundation depth of 20cm within 1 to 2 hours

Aim of the Project

What is happening

What is happening

What is happening

What is happening

Trabek Pond is shrinking

2003 Google 2010 Google 2014 Google

What is happening

With Trabek Pond Without Trabek Pond

Further Actions Needed in Phnom Penh

• Further drainage improvement and improved maintenance
• Raising public awareness on waste management
• Creation of sewerage system (currently no sewerage system in PP)

→ JICA started from Sep 2014 “Study on Drainage and Sewerage Improvement Project in Phnom Penh Metropolitan Area” and formulate Master Plan for better management in Phnom Penh

27

Items Description Quantity Construction Works Improvement of Wat Phnom Northern Area Drainage System Drainage Main Pipe 2.3 km Box Culvert 0.5 km Interceptor Pipe 1.6 km Manhole Pump 1 unit Pumping Station Pump 1.4 m3/sec Underground Reservoir 6,500 m3 Mechanical Screen 1 unit Improvement of Tuol Kork Area Drainage System Drainage Main Pipe 6.7 km Box Culvert 1.5 km Mechanical Screen Cleaning Facilities to Screen Pits at Pumping Stations Constructed in Phase 2 Auto Raking Machine Chak Tomuk PS Preah Kumulung PS Phsar Kandal PS Phsar Chaas PS 4 units Procurement Works Drainage Improvement Equipment Vehicle-Mounted Drainage Pump (Incl. Operation Training) 2 units

Contents of the Project for Phase 4 (2019-2021)

• Protection Level: → 2 year return period rainfall
• Inundation Depth: Max. 50 cm → 20 cm or less
• Inundation Period: Max. 9 hours → 2 hours or less

28

Location Map of the Facilities

29

29

General Layout of STP STP

Interception Facilities

Sewer Pile (Dia. 300mm, pressure type)

THE PREPARATORY SURVEY ON THE PROJECT FOR SEWERAGE SYSTEM DEVELOPMENT IN THE PHNOM PENH CAPITAL CITY

Component 1.Interception Facilities 2.Sewer Pipe

• Pressure Pipe
• L=2,000m (Dia. 300mm)
• 3. STP
• Capacity (5,000m3/day)
• Process Flow (Next Slide)

30

30

Proposed Process Flow of STP

 Wastewater Treatment System Pre-treated Trickling Filtration (PTF)  Sludge Treatment Facilities consists of: Gravity Sludge Thickener, Biogas Digester and Sludge Drying Bed, considering ease and low cost of O&M

THE PREPARATORY SURVEY ON THE PROJECT FOR SEWERAGE SYSTEM DEVELOPMENT IN THE PHNOM PENH CAPITAL CITY

Thank You