Manila Third Sewerage Project Henry Manguerra GEF-MTSP Consultant - - PowerPoint PPT Presentation

Manila Third Sewerage Project

Henry Manguerra GEF-MTSP Consultant August 3-4, 2011

 Introduction  Watershed/Water Quality Modeling 101  Chesapeake Bay TMDL – A Complex Modeling

Example

 GIS for Modeling  EPA SWMM5 Theory and Hands-On Tutorial  Hypothetical SWMM Application in San Juan

River Watershed

 Summary and Next Steps  Optional Module: MapWindow Hands-On

Exercises

Manila Third Sewerage Project

Introduction

Henry Manguerra GEF-MTSP Consultant August 3-4, 2011

 A watershed and water quality model that can

be used to evaluate water quality impacts of sewage and sanitation projects in Manila Bay watershed

 Desired Outcome:

Strengthen water quality modeling and assessment capabilities to support the identification of water pollution problems, the estimation of pollution loads, and the setting of priorities and targets for sewage and sanitation projects

 Use the model to assist in identifying strategic and effective

environmental projects for the restoration and protection of water quality of Manila Bay and its tributaries within the National Capital Region.

Master ter Plan

Factors: Pollution control effectiveness Financial/economic feasibility Social impacts Environmental impacts Institutional drivers and capacity

Master Plan Revision Under MTSP

Water Quality Modeling

17 LGUs Caloocan Las Pinas Makati Malabon Mandaluyong Manila Marikina Muntinlupa Navotas Paranaque Pasay Pasig Pateros Quezon City San Juan Taguig Valenzuela Main Receiving WaterBodies Pasig River Marikina River San Juan River NMTT River Paranaque Laguna de Bay MWSS Service Area MWSI MWCI

• Selected and approved

the EPA SWMM Model for San Juan WQMA

• Formed the Modeling

Workgroup

• EPA SWMM Model

Training

• EPA SWMM Model

Application Workshop

 To understand capabilities of the SWMM

model and its potential applications for the protection and restoration of Manila Bay watershed

 To gain operational familiarity of the model

through hands-on exercises supplemented by its theoretical underpinnings as needed

 To become familiar with selected data

processing/GIS technologies to support watershed/water quality modeling using SWMM model

 Decision makers, and program/project

managers involved in the restoration/ protection of the Manila Bay watershed

 Technical managers/specialists, modelers,

data and GIS specialists

Monitor water quality Assess against water quality standards to determine if waterbody is Impaired or not Implement Plan If impaired, determine allowable maximum pollutant load and required load reduction Plan what S&S Investments and management measures will collectively meet load reduction requirement

 Continuous Adaptive Management Process

WQ Monitoring Program WQ Standards Program TMDL Program NPDES Permitting, Compliance and Enforcement and NPS Programs

Model Model

 Jumpstarting the process

Monitor water quality Assess against water quality standards to determine if waterbody is Impaired or not Implement Plan If impaired, determine allowable maximum pollutant load and required load reduction Plan what S&S Investments and management measures will collectively meet load reduction requirement 50 Percent BOD Load Reduction

Model Model

Pollutant Loads from the Bay Watershed Water Quality Impacts at the Bay/Lake and Tributaries Management Decisions on Investments and Other Measures To Reduce Pollution Loads and Meet Water Quality Standards

Integrated Suite of Models = Watershed Model + Receiving Bay/Lake Model

• Land and in-stream processes
• Rainfall – runoff process
• Nonpoint and point pollutant

sources

• In-stream processes only
• Flow time series user input
• Pollutant sources are represented

as direct discharges to the stream

• EPA SWMM
• EPA HSPF
• USDA SWAT
• DHI Mike-BASIN
• DHI Mike-Urban
• DELTARES DELFT3D
• DHI MIKE11
• EPA WASP

WASP (Marikina River) DELFT3D (Laguna Lake) MIKE11 (Pasig River)

 Consistent with the paradigm of protecting and

restoring waters using the watershed approach

 Provides the capability to simulate important land-

based processes

• Rainfall – runoff
• Pollutant fate and transport of nonpoint (diffused) sources

during wet-weather

 Provides hydrologic and pollutant load input to

receiving water models (including to its internal in- stream module)

 Serves as a framework for a holistic and watershed-

wide assessment of what-if management scenarios including land-based measures

 Allows better integration with GIS technology

• Take advantage of watershed delineation and

characterization tools

• Watershed Model (Urban)
• Rainfall-Runoff Process
• Nonpoint Sources (Watershed)
• Point Sources (Direct Discharge)
• Steady, Kinematic, Dynamic
• Event-Based, Continuous

• The watershed model expands Agency’s modeling capacity and

flexibility

• use the most appropriate model for the given situation
• use an integrated model by linking watershed model with

receiving water model

(a) Watershed Model = SWMM Bay/Lake = Boundary conditions (c) Linked Model: Watershed Model = SWMM 2D/3D Receiving Water Model = DELFT3D (d) Linked Model: Watershed Model = SWMM 1D River Model = WASP 2D/3D Bay Model = DELFT3D (b) Linked Model: Watershed Model = SWMM 2D/3D Bay Model = DELFT3D/WASP Bay/Lake = Boundary conditions

• For the purposes of MTSP, configuration (a) is sufficient to

evaluate pollutant loads and load reductions associated with S&S investments

• Configurations (b), (c), (d) allow evaluation of water quality

impacts in the Bay

What is the impact of 50% reduction in BOD load? Will result to 50% reduction in BOD load to the water quality in the bay What S&S investments?

• Note that configuration (a) also allows the evaluation of water

quality impacts in 1-D receiving waters (e.g., Pasig river)