利用卫星图像进行淡水水库季节性营养分析

Rifa Rachmadita, A. Widiana, Ade Rahmat, S. Sunardi, M. Dede
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引用次数: 0

摘要

富营养化是一个影响水质和生态系统的水生问题,可以通过利用卫星图像分析水的营养状况的技术发展来解决。本研究旨在利用卫星图像确定不同季节淡水水库的营养状况。水质数据来自印度尼西亚Cirata水库干湿季节野外调查(11个样本),遥感影像来自Landsat-8 OLI卫星。营养状态是指由叶绿素- a和水透明度两个参数组成的卡尔森营养状态指数。这项研究发现,卫星图像可以估计季节性的营养信息。在雨季,该算法确定了叶绿素a(48%)和透明度(35%)的信息。而在旱季,算法成功估计的信息分别为59%和21%。不幸的是,Landsat-8 OLI在估算总磷方面存在局限性。从这两个参数来看,Cirata水库的营养状况表现为中度(雨季)和轻度(旱季)富营养化。Cirata水库在雨季的营养水平较高,因为它有更多的地表水供应和大量的污染物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Utilizing Satellite Imagery for Seasonal Trophic Analysis in the Freshwater Reservoir
Eutrophication, an aquatic problem that impacts water quality and ecosystems, can be addressed through technological developments utilizing satellite imagery to analyze the trophic status of water. This study aimed to determine the trophic status of the freshwater reservoir in different seasons using satellite imagery. Water quality data were obtained from field surveys (11 samples) during the wet and dry seasons in Cirata Reservoir (Indonesia) while the remote sensing images were obtained from the Landsat-8 OLI. Trophic status refers to Carlson's Trophic State Index consisting of two parameters named chlorophyll-A and water transparency. This study found that satellite imagery could estimate seasonal trophic information. During the wet season, the algorithms determined information about chlorophyll-A (48%) and transparency (35%). Whereas during the dry season, the algorithms successfully estimated both information at 59% and 21%, respectively. Unfortunately, the Landsat-8 OLI had limitations for estimating total phosphorus. From these two parameters, the trophic status in the Cirata Reservoir showed moderate (wet season) and mild (dry season) eutrophic. Cirata Reservoir has a higher trophic level during the wet season since it has more surface water supply with lots of pollutants.
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CiteScore
4.30
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