System For Flooding Alert in Tropical Coastal Zones Using GIS and Remote Sensing: A Case Study in Villahermosa, Mexico.

作者：Silva I H C^*; Miranda F P; Beisl C H; Landau L

来源：Journal of Coastal Research, 2011, 1736-1739.

• Spaceborne radar image
• Flooding phenomenon
• Mexico

SILVA, I. H. C; MIRANDA, F. P.; BEISL, C. H. and LANDAU. L., 2011. System For Flooding Alert in Tropical Coastal Zones Using GIS and Remote Sensing: A Case Study in Villahermosa, Mexico. Journal of Coastal Research, SI 64 (Proceedings of the 11th International Coastal Symposium), 1736-1739. Szczecin, Poland,
Diverse phenomena occuring on the surface of the Earth are part of Nature dynamics. When they affect social-economic systems, a potential situation of danger exists. Impacts on the population are more evident in urban areas, where irregular occupation of flood plains takes place. This is the case of the city of Villahermosa, which is located in a coastal area of the Tabasco state in Mexico. The objective of the present study is to conceive a methodology that characterizes flooding in terms of space and time. This is an innovative approach that includes
the use of spaceborne radar images as an aid for developing a system of alert to flood-related natural disasters. The research was initiated with the application of the USTC algorithm (Unsupervised Semivariogram Textural Classifier) to identify cover types representative of water, dry forest and flooded forest/buildings. The next step consisted in the definition of the region affected by precipitation, which was performed based on the delimitation of the area of the hydrographic basin that includes Villahermosa. Precipitation data were acquired using climatological CONAGUA (Comision Nacional Del Agua) stations. They allowed the identification of flood duration (approximately one month) and were then associated with the evolution in time of the flood area distribution. As a result, it was determined that Villahermosa is located in a region widely susceptible to flooding. Historical series of precipitation data indicate that future flood-related natural disasters are possible to happen in Villahermosa, which enhances the importance of the proposed methodology.

• 出版日期2011