The document outlines the water sampling process, detailing its objectives, methodology, and equipment used in environmental science. It emphasizes the importance of measuring water quality over time and identifying contaminant sources for effective water management. Various water samplers, such as the Van Dorn and Kemmerer samplers, are discussed along with the parameters to be measured during sampling.

1. Submitted by:
Name: Mohamoud Jibril
ID: 171-30-160
Semester: 8
Submitted to:
Dr. Mahfuza Parfeen
Assistant Professor
Daffodil International University
Dept: Environmental Science and Disaster Management
Course code: ESDM.408

2. Water sampling
The process of collecting a representative portion of water, as from the natural
environment or form an industrial for the purpose of analyzing and testing it’s quality.

3. Objectives of water sampling
 To observe and measure how water quality changes over
time.
 To identify the acidity and alkalinity of water.
 Identification of contaminant sources.
 Development and refinement of water management plans.

4. Sampling site
Chemical
Organic
In organic
Ph
Microbial
Bacteria
Virus
Protozoa
Helminths
Physical
Turbidity
Color
Odor
Taste

5. Before sampling
I. Purpose of Sampling
II. Area of sampling
III. Select analytical techniques or methods
IV. Wear gloves and take sampling containers

6. Water sampling methodology
1. Equipment
 Field sheets, sample labels
 Container for field measurements
 Container for collecting sample
 Filtration equipment
 Personal protective equipment, first aid and communication
equipment.

7. Water sampling methodology
2. Field sheet details
 Name and location of sampling point
 Date and time of sample collection
 Name and contact information of a person taking the sample

8. Water sampling methodology
3. Field parameters
 Temperature
 Conductivity
 pH
 Dissolved Oxygen
 Reduction/Oxidation potential
 Turbidity
 Alkalinity/Acidity

9. Water samplers
1.Van Dorn water sampler
The Van Dorn water sampler has
been specially designed for the
sampling of open water. it is also
suitable for sampling coastal
waters and for the analysis for
heavy metals.
the sampler is also suitable for
measuring parameters in water
with solid particles

10. Water samplers
2. Kemmerer water sampler
The Kemmerer water sampler
(vertical water bottle) is used
for general water sampling in
lakes, channels, wells and the
sea.

11. Water samplers
3. Plankton net
It is used to collect
microscopic animals
(zoo-plankton)

12. Water samplers
4.Secchi Disk sampling
A Secchi disk is an 8-inch
diameter disk with
alternating black and white
quadrants that is lowered
into the water column until it
can no longer be seen from
the surface. The point at
which the disk disappears is
a function of the lake
turbidity.

13. Water samplers
5.Integrated Sampler
A 2-meter integrated sampler is used for
collecting surface water samples in a lake
for total phosphorus and chlorophyll
analysis. It enables the sampler to
collect an integrated sample of the top 2
meters of the water column.