5.2 Detection and Monitoring of Pollution

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TASK 1: Planning lab (option to do it in pairs)

  • Aim: to measure the air quality by collecting air particulates (ppm) around various sites within the College campus.
  • http://www.nea.gov.sg/psi/ – link to Singapore government ‘haze’ and air quality updates which could be useful as background information and discussion.

TASK 2 – ONLINE LAB: This is a good review of productivity and a perfect connection with direct methods for measuring dissolved oxygen (DO) in water  (click here: Online lab DO)  – Focus questions: Why do we measure DO? What does a high/low reading tell us about water quality?

Class activity – Describe and evaluate the methods for measuring DO (based on this video) and class discussions:

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TASK 3: BODKick Sampling and Citizen’s Monitoring Biotic Index to identify species and their tolerance which reveals water quality (refer to handouts).

  1. In class you have simulated the  indirect method of collecting water invertebrates in a stream (see some class video clips below)
  2. You  have collected a sample of invertebrates using the ‘kick sample’ method which can now describe.
  3. Now that you have your sample, you will use the Citizen Monitoring Biotic Index to identify your species and determine the whether it is a healthy river or a polluted river, based on your sample of invertebrates (varying tolerance levels).
  4. Watch this tutorial and pause as needed so you can complete the activity along with the tutorial.
  5. You can find the tutorial here – A short instructional video on how to understand the health of a water body using a citizen guide biotic index and macroinvertebrate samples.

Student Video Clips:

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