通过遥感图像评估巴西帕姆普拉哈湖的水质恢复措施
Alexandre Assunção1, Talita F G Silva2, Lino A S de Carvalho3
1Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, Belo Horizonte, 31270-901, Minas Gerais, Brazil. assuncfa@gmail.com.
Environmental science and pollution research international
|January 21, 2025
概括
卫星图像有效地监测了城市水库的恢复,显示了水质的改善,尽管存在降雨和城市下水的挑战. 这种遥感方法支持对高缩湖的有效环境管理决策.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 水质管理水质管理
背景情况:
- 由于污染和缺乏监测,城市水库面临着严重的水质恶化.
- 巴西的庞普拉湖 (Lake Pampulha) 是一个过度缩的城市水库,自2016年以来一直在进行恢复工作.
- 有效的监测工具对于评估城市水生生态系统恢复措施的成功至关重要.
研究的目的:
- 评估卫星图像对评估Pampulha湖的修复措施的有用性.
- 开发和验证关键水质参数的遥感模型:总悬浮物质 (TSM),叶绿素-a (Chla) 和Secchi盘深度 (SDD).
- 通过空间时间水质分析,支持城市水库管理的决策.
主要方法:
- 利用了Landsat-8和Sentinel-2卫星图像以及历史的水质数据.
- 采用机器学习 (随机森林回归器) 和建立模型来估计TSM,Chla和SDD.
- 在2013-2022年模拟的水质数据上进行了时空分析,包括集群分析和趋势分析.
主要成果:
- 随机森林模型在使用两个卫星数据集估计TSM,Chla和SDD方面表现出卓越的性能.
- 时空分析揭示了庞普拉湖内不同的水质区,上游地区的水质条件较差.
- 恢复措施对水质产生了积极的影响,尽管雨季的城市排水导致了暂时的恶化.
结论:
- 遥感,特别是使用Landsat-8和Sentinel-2数据与机器学习,是监测城市水库健康状况的强有力的工具.
- 该研究成功地确定了水质的空间变化,并评估了恢复干预措施的有效性.
- 通过遥感的持续监测可以帮助环境管理者做出明智的决策,为城市湖泊的恢复和管理.
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