利用SSM/I数据的Getis统计量进行洪水程度监测与评价

IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293) Pub Date : 1999-06-28 DOI:10.1109/IGARSS.1999.774468

Yi Chen, Fu-Hai Zheng, Nan-Xiong Zhang, Yaqiu Jin

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引用次数: 3

摘要

本文研究了1998年7 - 8月DMSP SSM/I对长江流域洪涝区的观测。提出了一种由37 GHz和85 GHz通道水平极化亮度温度差定义的泛洪指数FI来检测泛洪。分析了7 - 8月洪涝期FI指数的时空变化规律。讨论了Getis统计量作为局部自相关函数来显示高值FI的空间聚类模式和相关性，并将其应用于洪水程度和时间演变的监测和评价。

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Monitoring and evaluation of flooding extent by using the Getis statistic of the SSM/I data

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.

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IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)

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