This document provides an overview of several topics related to water supply systems including surface water collection and transportation, pumping machinery, water quality, and alternative water supply technologies. Specifically, it discusses different types of water intakes, how water is transported through pressure and gravity pipes, common types of corrosion in metal pipes, the purposes of pumps and different types of pumps. It also outlines various types of water impurities, drinking water standards, and alternative water supply technologies such as tubewells, filters, and rainwater harvesting. The document concludes by asking about current water quality parameters in Bangladesh according to national standards and WHO guidelines.

1. PRESENTATION ON
REVIEW CLASS
Lecture-12

2. Lecture 08-11
 Surface Water Collection and Transportation
 Pump and Pumping Machinery
 Water Quality
 Alternatives Water Supply Technology

3. Surface Water Collection and Transportation
Intake
Transportation of water
Pressure pipe
Corrosion of metal pipe

4. Intake
The intake is a device placed in a surface water source to
permit the withdrawal of water from the source and then
discharge it into intake pipe through which it will flow
into the water works system.
There are mainly two types of intakes:
A. River intakes
B. Lake and Reservoir intake

5. Transportation of Water
The arrangements for the transportation of water from
the source of supply to the treatment plants and
subsequent distribution to the consumers form an
important part of the water works system
For transportation of water the following pipes are
required
1. Pressure pipe
2. Gravity pipe

6. Corrosion of Metal Pipe
Corrosion is a phenomenon by which metals
and their alloys are attacked by the
environment consisting of chemicals. The
are mainly two type of corrosion in pressure
water pipe:
1. External corrosion
2. Internal corrosion

7. Pump and Pumping Machinery
Purposes of the Pump and Pumping Machinery
Types of Pump

9. Water Quality
Impurities and their effect:
The impurities present in natural water may be grouped into the
following four categories:
1. Impurities of mineral origin
2. Impurities of organic origin
3. Living impurities
4. Radioactive impurities

10. Drinking Water Standard

11. Alternatives Water Supply Technology
The important alternative water supply technologies Include:
1. Shallow shrouded tubewell
2. Very shallow shrouded tubewell
3. Pond sand filter
4. Household filters
5. Infiltration galley
6. Rainwater harvesting

12. Assignment Question
Write down the current water quality parameters
value Considering Bangladesh standards and
WHO Guide lines.