Sakuno Yuji, Miño Esteban R, Nakai Satoshi, Mutsuda Hidemi, Okuda Tetsuji, Nishijima Wataru, Castro Rolando, García Amarillis, Peña Rosanna, Rodríguez Marcos, Depratt G Conrado
Environ Monit Assess. 2014 Jul;186(7):4181-93. doi: 10.1007/s10661-014-3689-6.
This study aims to study the distribution of contaminants in rivers that flow into the Caribbean Sea using chlorophyll-a (Chl-a) and suspended sediment (SS) as markers and ALOS AVNIR-2 satellite sensor data. The Haina River (HN) and Ozama and Isabela Rivers (OZ-IS) that flow through the city of Santo Domingo, the capital of the Dominican Republic, were chosen. First, in situ spectral reflectance/Chl-a and SS datasets obtained from these rivers were acquired in March 2011 (case A: with no rain influence) and June 2011 (case B: with rain influence), and the estimation algorithm of Chl-a and SS using AVNIR-2 data was developed from the datasets. Moreover, the developed algorithm was applied to AVNIR-2 data in November 2010 for case A and August 2010 for case B. Results revealed that for Chl-a and SS estimations under cases A and B conditions, the reflectance ratio of AVNIR-2 band 4 and band 3 (AV4/AV3) and the reflectance of AVNIR-2 band 4 (AV4) were effective. The Chl-a and SS mapping results obtained using AVNIR-2 data corresponded with the field survey results. Finally, an outline of the distribution of contaminants at the mouth of the river that flows into the Caribbean Sea was obtained for both rivers in cases A and B.
本研究旨在以叶绿素a（Chl-a）和悬浮泥沙（SS）为指标，利用先进陆地观测卫星（ALOS）的高级可见光与近红外辐射计2（AVNIR-2）卫星传感器数据，研究流入加勒比海的河流中污染物的分布情况。研究选取了流经多米尼加共和国首都圣多明各市的阿伊纳河（HN）以及奥萨马河和伊莎贝拉河（OZ-IS）。首先，于2011年3月（情况A：无降雨影响）和2011年6月（情况B：有降雨影响）获取了从这些河流中得到的现场光谱反射率/Chl-a和SS数据集，并根据这些数据集开发了利用AVNIR-2数据估算Chl-a和SS的算法。此外，将开发的算法应用于2010年11月的情况A和2010年8月的情况B的AVNIR-2数据。结果表明，对于情况A和情况B条件下的Chl-a和SS估算，AVNIR-2的4波段与3波段的反射率比值（AV4/AV3）以及AVNIR-2的4波段反射率（AV4）是有效的。利用AVNIR-2数据获得的Chl-a和SS制图结果与实地调查结果相符。最后，得出了情况A和情况B中两条河流流入加勒比海河口处污染物分布的概况。
