Title :
Monitoring and evaluation of flooding extent by using the Getis statistic of the SSM/I data
Author :
Chen, Yi ; Zheng, Fu-Hai ; Zhang, Nan-Xiong ; Jin, Ya-Qiu
Author_Institution :
Wave Scattering & Remote Sensing Center, Fudan Univ., Shanghai, China
Abstract :
Observation by the DMSP SSM/I over flooding area along the Yangzi River, China during July-August 1998 is studied. A flooding index FI defined by the difference of horizontally-polarized brightness temperature at 37 and 85 GHz channels is proposed to detect flooding. Spatial and temporal variation of the FI index during flooding July-August is demonstrated. The Getis statistics, as a local autocorrelation function, is discussed to show spatial clustering pattern and correlation of high value FI, and is applied to monitoring and evaluation of flooding extent and temporal evolution
Keywords :
hydrological techniques; radiometry; remote sensing; rivers; 37 GHz; 85 GHz; AD 1998; China; EHF; Getis statistic; SSM/I; Yangtze; Yangzi River; flood; flooding area; flooding extent; flooding index; hydrology; measurement technique; microwave radiometry; mm wave; remote sensing; river; spatial extent; Autocorrelation; Brightness; Floods; Land surface; Polarization; Rain; Remote monitoring; Rivers; Scattering; Statistics;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International
Conference_Location :
Hamburg
Print_ISBN :
0-7803-5207-6
DOI :
10.1109/IGARSS.1999.774468
