Bellingcat: The Disappearance of Quitobaquito Springs: Tracking Hydrologic Change with Google Earth Engine. “Establishing a direct causal relationship between ongoing construction work and a system as interconnected and complex as an aquifer is also extremely difficult. Those responsible for the border wall construction project also deny impacting Quitobaquito Springs. When contacted by Bellingcat, US Customs and Border Protection (CBP) said ‘monsoonal and leaks with the existing liner of the pond’ were more likely behind the falling water levels. Fortunately, open source investigative methods can provide us with valuable information to help address these questions and hypotheses. Not only can we measure the loss of water in the pond from satellite imagery, we can also use other public data sets to evaluate explanations such as drought and agricultural water usage.