CDXi Water

CDXi Water (former PathoSAT) provides the following functionality:

• Hydrocarbon detection and alerting module. Oil spills or hydrocarbon formations in inland waters can generally occur due to accidents during transportation, leaks from storage facilities, or illegal dumping of waste, to name a few. One of the main concerns with oil spills is the potential contamination of drinking water supplies. Hydrocarbons can give an unpleasant taste and odour to water while some hydrocarbon compounds are toxic and carcinogenic, making the water unsuitable for consumption as it can pose serious health risks when ingested. The module utilizes Sentinel-2 satellite imagery to provide its output.

• Muddy waters mapping module. Muddy water is typically caused by increased sedimentation and suspended particles, which can be the result of soil erosion agricultural runoff, or construction activities in the surrounding area and usually occur along with and after heavy rainfall events. One of the primary concerns with muddy water presence is its effect on water treatment processes. In other words, high sediment loads can negatively affect the filtration and clarification systems of the water utilities, requiring more frequent maintenance and increased use of chemicals to treat the water, which in turn raises treatment costs. The module utilizes Sentinel-2 satellite imagery to provide its output.

• Algae bloom/chlorophyll-a detection estimation and forecasting module. The module indicates the presence of Phycocyanin and Phycoerythrin by identifying reflectance and absorption discrepancies between the 550nm and 650nm wavelength bands, which are indicative of the appearance of the Cyanobacteria related pigments. The analysis considers aspects like in-water organic absorption, in-water turbidity, and spectral characteristics of each water body. The forecasting part includes the analysis of satellite image time series and the generation of the short-term expected levels of algae blooms with a Generative Adversarial Network architecture.