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

JICA’s Priority Area in Cambodia 1. Support for Industrial Development 2. Improvement of Quality of Life 3. Realization of Sustainable Society through Strengthening of Governance 4

JICA’s Approach Capacity Infrastructure Development Quality infrastructure Development of Master Plan Human Resource Dev.t Technical Assistance Long – term Commitment Holistic Assistance 5

Drainage/Sewerage Improvement in Phnom Penh

Phnom Penh 2011 Flood Situation in Cambodia

Flood Situation in Central Phnom Penh (before project) Note that the sky is blue (taking long time for water level to drop)

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

General Concept for Rain water/ Wastewater Discharge in PP. 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

Location Map For the Project for Flood Protection and Drainage Improvement in Phnom Penh Phase 1 - 4 11

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

Flood Protection &Drainage Improvement in PP (Phase II) 1. Improvement of two sections of Revetment along Tonle Sap River 2. Improvement of Wat Phnom Area Drainage System (DS), construction of one Underground Reservoir (UR) and one 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 of two PS & two UR 5. Construction of Interceptor Pipe along Tonle Sap River Park

Riverbank Enforcement and Underground Reservoir Underground reservoir help to absorb sudden impact of rain water

Basic Function of the Pumping Stn. Looking from the Top Waste Water (+Rain Water) from Town Looking from the Side Screen Pit Pump only (collecting during Rainy waste) Season when river level is high Screen Pumping Pit Stn River Level (Rainy Season) Reserve Water when sudden Overflow Overflow strong rain when Flow out when strong naturally strong rain when river rain River Level level is low (Dry Season) Underground Pump only during Reservoir Rainy Season when Tonle Sap (River) (Reserve Water river level is high temporary to absorb impact of rain water) Normal Flow (to Trabek Pumping Stn,)

Flood Protection &Drainage Improvement in PP (Phase III) 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

Drainage System for Phase III 17

Drainage System for Phase III 18

Sludge Sucker and High Water-Jet Machine After Before High Water-Jet Machine Sludge Sucker 19 Dangerous and Unhygienic

Aim of the 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 Before Project After Project

What is happening

What is happening

What is happening

What is happening Trabek Pond is shrinking 2003 Google 2014 Google 2010 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

Contents of the Project for Phase 4 (2019-2021) Items Description Quantity Construction Works Improvement of Wat Phnom Drainage Pipe 2.3 km Northern Area Drainage System Main Box Culvert 0.5 km Interceptor Pipe 1.6 km Manhole Pump 1 unit Pumping Pump 1.4 m 3 /sec Station Underground Reservoir 6,500 m 3 Mechanical Screen 1 unit Improvement of Tuol Kork Area Drainage Pipe 6.7 km Drainage System Main Box Culvert 1.5 km Mechanical Screen Cleaning Auto Chak Tomuk PS 4 units Facilities to Screen Pits at Raking Preah Kumulung PS Pumping Stations Constructed in Machine Phsar Kandal PS Phase 2 Phsar Chaas PS Procurement Works Drainage Improvement Vehicle-Mounted Drainage Pump 2 units Equipment (Incl. Operation Training) - Protection Level : → 2 year return period rainfall - Inundation Depth : Max. 50 cm → 20 cm or less 27 - Inundation Period : Max. 9 hours → 2 hours or less

Location Map of the Facilities 28

THE PREPARATORY SURVEY ON THE PROJECT FOR SEWERAGE SYSTEM DEVELOPMENT IN THE PHNOM PENH CAPITAL CITY Interception Facilities Sewer Pile (Dia. 300mm, pressure type) STP Component 1.Interception Facilities 2.Sewer Pipe - Pressure Pipe - L=2,000m (Dia. 300mm) 3. STP - Capacity (5,000m3/day) 29 29 - Process Flow (Next Slide) General Layout of STP

THE PREPARATORY SURVEY ON THE PROJECT FOR SEWERAGE SYSTEM DEVELOPMENT IN THE PHNOM PENH CAPITAL CITY  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 Proposed Process Flow of STP 30 30

Thank You