For full note on ambient air quality monitoring, click here.
Tuesday, May 01, 2018
Infograph - How Many Air Quality Monitoring Stations are Required in My City?
A general understanding is that an ambient monitoring station can represent an area covering 2 km radius, which translates to 15 sq.km (rounded off). If the city size is 1,000 sq.km, then you need 67 stations spread across the city. In addition, we must also consider population density, the range of industrial activities, and local landuse, which will further determine the required number of stations.
For full note on ambient air quality monitoring, click here.
For full note on ambient air quality monitoring, click here.
101 Notes on Air Pollution Monitoring
During a question and answer session in Delhi late last year, I was asked this question “Since Diwali, the Delhi government has installed 20 continuous monitoring stations. Despite that, why are the pollution levels still so high?”. The simple answer to this is that monitoring is a diagnostic tool to assess levels of air pollution and in and off itself does not reduce any air pollution. What it does do, is provide a starting point for understanding the air pollution problem and a direction for addressing pollution control options.
This however got me thinking. Having worked on air pollution related research for my entire career, I have to constantly remind myself of a cognitive bias while communicating on matters related to air pollution. This means that I (unknowingly) assume that others also understand the concepts related to air pollution as I understand them. This type of bias tends to be reinforced when speaking to other “experts” and the only way to break out of this bias is to communicate as clearly as possible to people. There are several topics within air pollution that I would like to speak about – such as source apportionment, dispersion modelling, emissions inventory, etc. However, in this discussion I will focus solely on “air pollution monitoring”.
This note is my attempt to explain air pollution monitoring – What purpose does it serve? Is ambient monitoring the same as emissions monitoring? How does one monitor? How do “low-cost” monitors fit in? These are some of the questions, I will try to answer in this brief (all the references used in this piece are from India, but the notes is relevant for other countries as well).
Direct link to the note
This note is my attempt to explain air pollution monitoring – What purpose does it serve? Is ambient monitoring the same as emissions monitoring? How does one monitor? How do “low-cost” monitors fit in? These are some of the questions, I will try to answer in this brief (all the references used in this piece are from India, but the notes is relevant for other countries as well).
Direct link to the note
Thursday, April 26, 2018
Infograph - How the Receptor Model Based Source Apportionment Works?
The 101
note is my attempt to explain air pollution monitoring – What purpose
does it serve? Is ambient monitoring the same as emissions monitoring?
How does one monitor? How do “low-cost” monitors fit in?
Building an effective air pollution control plan for the cities and the regions, it is important to know the contribution of sources. This is not a easy process, as it involves many steps, some related to field experiments, some related to laboratory analysis, some related to (statistical and predictive) modeling, and some related to linking the results to pollution control planning. We tried to structure these steps into this primer of pollution source apportionment, explaining the various steps involved in building an informed air quality management plan. You can download a pdf version of the primer here or browse the pages below.
Building an effective air pollution control plan for the cities and the regions, it is important to know the contribution of sources. This is not a easy process, as it involves many steps, some related to field experiments, some related to laboratory analysis, some related to (statistical and predictive) modeling, and some related to linking the results to pollution control planning. We tried to structure these steps into this primer of pollution source apportionment, explaining the various steps involved in building an informed air quality management plan. You can download a pdf version of the primer here or browse the pages below.
Infograph - How Manual Ambient Air Quality Monitoring System Works?
The 101
note is my attempt to explain air pollution monitoring – What purpose
does it serve? Is ambient monitoring the same as emissions monitoring?
How does one monitor? How do “low-cost” monitors fit in?
Infograph - How Continuous Ambient Air Quality Monitoring System Works?
The 101 note is my attempt to explain air pollution monitoring – What purpose does it serve? Is ambient monitoring the same as emissions monitoring? How does one monitor? How do “low-cost” monitors fit in?
Wednesday, April 25, 2018
Saturday, April 07, 2018
Friday, April 06, 2018
Thursday, April 05, 2018
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