Monitoring water quality in the lower Kansas River using remote sensing

被引：0

作者：

Tufillaro, Nicholas ^{[1
]}

Grötsch, Philipp ^{[1
]}

Lalović, Ivan ^{[1
]}

Moitié, Sara De ^{[1
]}

Zeitlin, Luke ^{[1
]}

Zurita, Omar ^{[1
]}

机构：

[1] Gybe, Portland, OR

来源：

River | 2024年 / 3卷 / 03期

关键词：

harmful algal blooms; hyperspectral; Kansas River; nitrates; nutrients; remote sensing; turbidity; water quality;

D O I：

10.1002/rvr2.97

中图分类号：

学科分类号：

摘要：

We demonstrate how to combine remote sensing data from satellite imagery (Sentinel-2) with in situ water quality gauging (USGS Super Gages and the Gybe hyperspectral radiometer) to create spatially dense maps of water quality parameters (chlorophyll-a concentration, turbidity, and nitrate plus nitrite concentration) along the lower Kansas River. The water quality maps are created using locally tuned models of the target water quality parameters, and this study describes the steps used to design, calibrate, and validate the empirical correlations. Water quality parameters such as chlorophyll-a concentration are correlated with well-studied absorption and scattering features in the visible spectrum (roughly 400–700 nm). Nutrients (such as nitrate plus nitrite concentration) lack strong absorption features in the visible spectrum, and in those cases we describe a novel surrogate data modeling approach that identifies overlapping water parcels between the in situ gauging and the remote sensing imagery. Measurements from the overlapping water parcels yield excellent correlations ((Formula presented.)) for the target water quality parameters for limited windows of time (or limited sections of river reaches). Examples are provided illustrating how the water quality maps can be used to track river inputs from ungauged sources (such as creeks), or reveal the mixing patterns at the confluences. © 2024 The Author(s). River published by Wiley-VCH GmbH on behalf of China Institute of Water Resources and Hydropower Research (IWHR).

引用

页码：284 / 303

页数：19

共 37 条

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