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基于GF-1号卫星WFV数据的太湖水质遥感监测

DOI: 10.6046/gtzyyg.2015.01.18, PP. 113-120

Keywords: 叶绿素a浓度,悬浮物浓度,透明度,富营养化指数

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Abstract:

为研究高分一号(GF-1)卫星数据监测太湖水质的可行性,基于新发射的GF-1卫星16m分辨率的多光谱宽覆盖(widefieldofview,WFV)相机和HJ-1ACCD数据,对太湖的叶绿素a、悬浮物、透明度和富营养化状况进行遥感监测,以评价GF-1WFV相机的应用潜力。研究结果表明:GF-1WFV与HJ-1ACCD数据对水质参数的反演结果具有一致性,可有效反映叶绿素a浓度、悬浮物浓度、透明度和富营养化指数的空间变化规律。其中,太湖西北部分布有少量水华蓝藻,在大面积蓝藻爆发区域附近,叶绿素a浓度明显高于其他区域的水体,平均浓度为62.46mg·m-3;悬浮物浓度以竺山湾及西部沿岸湖区较大,沿西北向东南方向递减,平均浓度为26.07mg·L-1;透明度整体从西北向东南递增,与悬浮物浓度的分布趋势相反,平均值为22.1cm;富营养化指数整体从西北向东南递减,与叶绿素浓度的分布趋势相同,平均值为69.62。遥感监测指标的结果均符合常规监测规律。

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