Mapping acidic mine waste with seasonal airborne hyperspectral imagery at varying spatial scales

摘要: Airborne imaging spectrometer (also known as hyperspectral) remote sensing has been widely used to characterize mineralogy on mine waste surfaces, which is useful for predicting potential sources of acidity and metal leaching. The most successful applications employ fine spatial resolution—20-m pixels or smaller. Future satellite sensors are proposed provide coarser resolution—30- 60-m pixels. This study examined the ability map minerals related acid drainage with visible shortwave infrared hyperspectral imagery at varying scales (2-, 15-, 30-, pixels) Leviathan Superfund site, located in Eastern Sierra Nevada. Mineral maps were produced using spectral angle mapper matched filtering algorithms. 15-m images provided comparable 2-m images. 30- lost identify smaller features; however, they still able high- low-priority remediation zones least 75 m width. Based our results, we believe 30-m resolution a sensor will be sufficient identifying hazardous surfaces larger sites important reconnaissance information that can help prioritize detailed ground-based studies.