Preliminary water quality assessment of Calumpang River IN Batangas City, Philippines using UAV-based remote sensing and surface water analysis
2018
Lit, J.M.C.
Water bodies in our planet include rivers, which provide various ecosystem services. Monitoring water quality is essential for assessment of current conditions and progress of rehabilitation efforts of water bodies. Calumpang River in Batangas City, Philippines, holds large potential for ecosystem services but is hindered by degraded water quality at present. This study aimed to develop an initial method for water quality assessment through interpolation of imagery from an unmanned aerial vehicle (UAV), and surface water quality data (chlorophyll-a and CDOM) measured from in-situ water sampling on reference points on the Calumpang River, with considerations for temporal variations (dry vs. wet season). Surface water quality data for each season and UAV imagery collected from the dry season serve as preliminary results. Analyses indicated higher chlorophyll-a concentrations during the dry season, and CDOM concentrations were higher during the wet season. This is attributed to observed increased amount of detritus in the river accumulated through runoff and loading. The method of interpolating UAV imagery and water quality data can serve and be further improved as a means for rapid assessment of the water quality in water bodies in the future, and aid in the evaluation, monitoring, and management of water resources.
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