Related Experiment Video
Updated: Aug 23, 2025
07:13
Early Detection of Cyanobacterial Blooms and Associated Cyanotoxins using Fast Detection Strategy
Published on: February 25, 2021
3.9K
Using multispectral drones to predict water quality in a subtropical estuary.
Anna B Giles1, Rogger E Correa1,2, Isaac R Santos1,3
1National Marine Science Centre, Southern Cross University, Coffs Harbour, Australia.
Environmental Technology
|November 2, 2022
Summary
Drone multispectral imagery effectively predicts water quality parameters like chlorophyll in intermittently closed and opened lakes. However, temporal variations require dynamic, site-specific models for accurate monitoring.
Area of Science:
- Environmental Science
- Remote Sensing
- Water Resource Management
Background:
- Drones are increasingly vital for high-resolution earth system observations.
- Monitoring water quality in intermittently closed and opened lakes (ICOLs) presents unique challenges due to dynamic conditions.
Purpose of the Study:
- To assess the efficacy of drone-based multispectral imagery in predicting key water quality parameters in an ICOLL.
- To identify specific spectral bands and ratios correlated with water quality indicators.
Main Methods:
- Conducted three water quality sampling campaigns measuring parameters like chlorophyll, dissolved oxygen, and turbidity.
- Utilized DistilM statistical analyses to identify key spectral bands and performed linear correlations with water quality data.
Main Results:
- Significant correlations (R² > 0.4) were found for eleven water quality parameters, with chlorophyll showing the strongest link to the green band (R² = 0.72).
- The most influential spectral bands varied monthly, highlighting temporal dynamics.
- Predictive band importance differed significantly across campaigns and water quality variables.
Conclusions:
- Drone-based multispectral sensors provide valuable 'snapshot' predictions for parameters like chlorophyll, bluegreen algae, and dissolved oxygen.
- A single predictive model is insufficient for dynamic estuarine systems due to temporal variations in water parameters.
Related Concept Videos
01:14Testing Water Quality
164
When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
164
01:19Quality of Water
163
In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...
163