Naizhuo Zhao

ABSTRACT Nighttime remote sensing imagery collected in 2000 and 2003 is exploited to estimate domestic water consumption (DWC) in China and the United States at province/state level. Sum light derived from satellite imagery has a statistically significant correlation with official DWC both in China and the United States. However, the differences of the patterns of settlement and DWC of the two countries lead to the differences of the estimation processes and the precision of estimations. These findings offer potential for compiling and mapping annual DWC in the future.

ABSTRACT With the quantitative remote sensing developing, the promising use of multi-angle polarization information has been recognized. Since polarized reflectance always goes with bidirectional reflectance, we can attain the polarized three-dimensional spatial distribution of the target by a polarizer while detecting its bidirectional reflectance. In this paper, polarized reflectance of dry peat with different water content was collected using a polarized bi-directional reflectance photometer. The polarized measurements for peat samples with different water content were performed at various zenith viewing angles, incidence light zenith angles and azimuth angles with band A (630-690nm) and band B(760-1100nm). The polarization changes of different peat moisture were analyzed quantitatively. The results revealed that there were close and positive relationship between peat polarized reflectance characteristics and water content, peat characteristics and sensor's viewing geometry. Polarized reflectance of peat will not only help to find a new way for peat detection remotely, but also provide a theoretical basis for further research on the polarized light remote sensing.

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ABSTRACT Oil pollution can be monitored by infrared remote sensing technology. In this work, the degree of polarization (DOP) was established as a quantitative index of oil pollution. The crude oil and the local typical surface soil from the Songyuan oil field in Jilin province were collected. Some soil samples with four levels of oil content and three levels of water content were prepared and measured. The DOP of the polluted soil and the clean soil in the field was also measured at 180° relative viewing azimuth angle, and 10°, 30° and 50° viewing zenith angles. It was found that with rising soil oil content, the DOP of the reflected light on the soil surface increased when the soil water content was low, and decreased when the soil water content was high.