Assessing optical earth observation systems for mapping and monitoring temporary ponds in arid areas

作者：Soti Valerie^*; Tran Annelise; Bailly Jean Stephane; Puech Christian; Lo Seen Danny; Begue Agnes

来源：International Journal of Applied Earth Observation and Geoinformation, 2009, 11(5): 344-351.

DOI：10.1016/j.jag.2009.05.005

• Remote sensing
• Monitoring
• Temporary ponds
• Water indices
• Arid areas

Remote sensing methods for locating and monitoring temporary ponds over large areas in and lands were tested on a study site in Northern Senegal. Three main results are presented, validated with field data and intended to highlight different spectral, spatial and temporal characteristics of the methods: (1) Among several water indices tested, two Middle Infrared-based indices (MNDWI-Modified Normalized Difference Water Index and NDWI(1)-Normalized Difference Water Index) are found to be most efficient; (2) an objective method is given prescribing the necessary sensor spatial resolution in terms of minimal detected pond area; and (3) the potential of multi-temporal MODIS imagery for tracking the filling phases of small ponds is illustrated. These results should assist in epidemiological studies of vector-borne diseases that develop around these ponds, but also more generally for land and water management and preservation of threatened ecosystems in and areas.

• 出版日期2009-10