Vignolo Alicia, Pochettino Alberto, Cicerone Daniel
Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Provincia de Buenos Aires, Argentina.
J Environ Manage. 2006 Dec;81(4):429-33. doi: 10.1016/j.jenvman.2005.11.019. Epub 2006 Apr 18.
Two spectral bands of the visible spectrum [0.45-0.52 microm (Blue), 0.52-0.60 microm (Green)] of satellite images obtained by LANDSAT 7 ETM+ have been used in this study to follow the contaminated waters of Medrano Creek when it flows into Río de la Plata River. The former is one of the five fresh watercourses going through the Metropolitan Area of Buenos Aires, Argentina, where 13 million people live. Previous studies have shown that the water quality of Rio de la Plata at the outlet of Medrano Creek has decreased more than 50% as a source of water for human consumption. The non-treated effluents of the textile industry probably affect the water quality. We have developed a model that predicts the water quality index (WQI) of surface waters in the study area and uses linear regression analysis. The model has been validated using a data set of 12 physicochemical parameters obtained during the last 3 years. The potentiality of using satellite images was confirmed by the results: (a) to trace the organic contamination (associated with dyes) in freshwater systems and (b) as tools for decision making in the management of water resources.
本研究使用了由陆地卫星7号增强型专题绘图仪（LANDSAT 7 ETM+）获取的卫星图像中可见光谱的两个波段[0.45 - 0.52微米（蓝色），0.52 - 0.60微米（绿色）]，来追踪梅德拉诺溪（Medrano Creek）流入拉普拉塔河（Río de la Plata River）时受污染的水域。梅德拉诺溪是流经阿根廷布宜诺斯艾利斯大都市区的五条淡水河道之一，该地区有1300万人居住。先前的研究表明，作为人类饮用水源，梅德拉诺溪河口处的拉普拉塔河水质下降了50%以上。纺织工业未经处理的废水可能影响了水质。我们开发了一个预测研究区域地表水水质指数（WQI）的模型，并使用了线性回归分析。该模型已通过使用过去三年间获取的12个理化参数的数据集进行了验证。结果证实了使用卫星图像的潜力：（a）追踪淡水系统中的有机污染（与染料有关）；（b）作为水资源管理决策的工具。
