assessment of drinking water supply system ...

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ASSESSMENT OF DRINKING WATER SUPPLY SYSTEM CONFIGURATIONS IN CONDITIONS OF EMERGENCY APPLIED TO AN EARTHQUAKE SCENARIO IN THE CITY OF BOGOTA- COLOMBIA Liliana Miranda Paola Villamil Sebastián Hernández

Process and Product Design Group Chemical Engineering Department School of Engineering Universidad de los Andes

Overview 1. Approach to the problem 2. Objectives 3. General Considerations 4. Drinking Water in emergencies 5. Assessment methodology 6. Configuration assessment 7. Conclusions and Recommendations

Problematic Approach

Problem

The Savannah of Bogotá has a functional and seismic vulnerability in case of a natural disaster, in which its drinking water supply systems would fail, leaving a large percentage of population affected

Problematic Approach

In case of earthquake

•More than a 40% of the buildings could fail.

• Geophysical and topographical failures would affect the water, energy and communications supply systems. • An integral plan of analysis of technologies has to be improve in institutional accommodations in case of emergency, directed by the Commission of Infrastructure, Mobility and public Utilities.

Objetives

To select commercially available technologies to supply drinking water. • Identification of typologies of institutional accommodations.

• Analysis of different scenarios proposed for an eventual case of emergency • Assessment of technologies and configurations of water production systems according to the criteria evaluated.

General considerations Housing unit

UH = 4-5

Types of construction

Tents lightweight construction

Definitions & Concepts

Module

center of common service Suministro de Energía

DRINKING WATER

20-25

Meanings & Concepts Accommodation Type

Accommodation type

Area (m²)

A1

A2

A3

100

500

1000

20-25

100-125

200-250

4-5

20-25

40-50

400-500

2000-2500

4000-5000

Drinking Water Emergencies

 Normal situations: Wide range of parameters. Emergency: Parameters are readjusted Water without microbial risk should be guaranteed Minimum quantity of required water Easy accessibility Continuity of service Water treatment systems: minimum number of chemical products for its operation

Drinking Water Emergencies

• For emergencies (less than 1 month)

Drinking Water Emergencies

• For emergencies (more than 1 month)

Parameter

Concentration o Value

Chlorides and Sulfates

Chlorides 200 - 300 mg/l.

Nitrates Turbidity

Sulfates 200-900 mg/l < 45mg/l Drinking Water< 5 NTU

Color

To obtain disinfection efficiency < 1 NTU Colorless

Flavor pH

N/A 4 < pH