The quality of water bodies is a key determinant in the usability of the resource for the purpose required. It is therefore of great importance to managers of hydrologic resources to be able to confidently tell the status of their water resource. One of the major problems in the quality of surface water bodies is the blooming of algae and blue green algae. Algal blooms can result in ecological, social and economic depreciation of lakes and reservoirs and other surface water bodies with a possible adverse effects to human health from blue-green algal toxins. Monitoring of such water bodies requires an up-to-date spatial and temporal representative water quality data and analysis.
What is satellite remote sensing?
Satellite remote sensing as an art of obtaining information about an object, area or phenomenon through an analysis of data acquired from a device that is not in direct contact with area, object or phenomenon. In addition to other environmental applications, it allows the monitoring and prediction of the quality of surface water bodies regularly.
The conventional ship-based field measurement and analysis techniques are very limited both in spatial and temporal coverage, thus the need to determine other methods to retrieve water quality parameters accurately. One of the ways to overcome this is to integrate earth observation products derived from satellite imagery in the management tools to improve the water quality monitoring and predicting programs.
Satellite remote sensing in combination with in-situ water quality data allows for the detection and monitoring of the quality of larger surface water bodies at higher spatial and temporal coverages.
Remote sensing (RS) technique, which utilizes the optical properties of blue-green algal blooms (Chlorophyll-a and Phycocyanin), suspended sediments (SPM) and Colored Dissolved Organic Matter (CDOM) can provide data and tools to estimate the concentrations of these constituents with synoptic swath and high temporal frequency.
Benefits satellite remote sensing
- Synoptic view: Allows to have a complete overview of the water quality in surface water bodies in their spatial relation to each other which helps delineate the required features and phenomenon.
- Accessibility: It makes it possible to gather information about inaccessible areas where it is not possible to gather information through ground surveys.
- Time: The technique saves time & efforts as information about large area can be gathered quickly.
- Multidisciplinary applications: In addition to other applications, remote sensing data is used in retrieving different water quality parameters such as water temperature, algae and blue-green algae blooming, suspended particulate matter and colored dissolved organic matter etc.
Satellite remote sensing technology combined with real-time water quality data
LG Sonic has integrated the satellite remote sensing technique to the real-time in-situ water quality data from the MPC-Buoys to accurately map the spatial and temporal distribution of the optically active water quality parameters to help effectively monitor and improve the ultrasonic algae control systems. The MPC-Buoy combines online water quality monitoring, web-based software and ultrasound technology to provide state-of-the-art treatment against algae in lakes, ponds and drinking water reservoirs.
Want to know more about ultrasonic algae control and biofouling prevention?
Since 1999, LG Sonic has been a leading international manufacturer of algae control and biofouling prevention systems. Our products provide an environmentally friendly solution to effectively control algae in lakes, reservoirs, treatment plants, and other applications. Over the last decade, more than 10,000 LG Sonic® products have been successfully installed in 52 different countries. More information can be found at the LG Sonic website.