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Optimization of bio-optical model parameters for turbid lake water quality estimation using LANDSAT 8 and WASI-2D

Manuel, A. and Blanco, A.C. and Tamondong, A.M. and Jalbuena, R. and Cabrera, O. and Gege, Peter (2019) Optimization of bio-optical model parameters for turbid lake water quality estimation using LANDSAT 8 and WASI-2D. In: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XLII-3, pp. 67-72. ISPRS. PECORA 21/ISRSE 38 Joint Meeting, 6.-11. Oct. 2019, Baltimore, Maryland, USA. doi: 10.5194/isprs-archives-XLII-3-W11-67-2020. ISSN 1682-1750.

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Official URL: https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-3-W11/67/2020/

Abstract

Laguna Lake, the Philippines' largest freshwater lake, has always been historically, economically, and ecologically significant to the people living near it. However, as it lies at the center of urban development in Metro Manila, it suffers from water quality degradation. Water quality sampling by current field methods is not enough to assess the spatial and temporal variations of water quality in the lake. Regular water quality monitoring is advised, and remote sensing addresses the need for a synchronized and frequent observation and provides an efficient way to obtain bio-optical water quality parameters. Optimization of bio-optical models is done as local parameters change regionally and seasonally, thus requiring calibration. Field spectral measurements and in-situ water quality data taken during simultaneous satellite overpass were used to calibrate the bio-optical modelling tool WASI-2D to get estimates of chlorophyll-a concentration from the corresponding Landsat-8 images. The initial output values for chlorophyll-a concentration, which ranges from 10-40 ug/L, has an RMSE of up to 10 ug/L when compared with in situ data. Further refinements in the initial and constant parameters of the model resulted in an improved chlorophyll-a concentration retrieval from the Landsat-8 images. The outputs provided a chlorophyll-a concentration range from 5-12 ug/L, well within the usual range of measured values in the lake, with an RMSE of 2.28 ug/L compared to in situ data.

Item URL in elib:https://elib.dlr.de/137063/
Document Type:Conference or Workshop Item (Speech)
Title:Optimization of bio-optical model parameters for turbid lake water quality estimation using LANDSAT 8 and WASI-2D
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Manuel, A.University of the Philippines DilimanUNSPECIFIED
Blanco, A.C.University of the Philippines DilimanUNSPECIFIED
Tamondong, A.M.University of the Philippines DilimanUNSPECIFIED
Jalbuena, R.University of the Philippines DilimanUNSPECIFIED
Cabrera, O.University of the Philippines DilimanUNSPECIFIED
Gege, Peterpeter.gege (at) dlr.dehttps://orcid.org/0000-0003-0939-5267
Date:2019
Journal or Publication Title:The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:XLII-3
DOI :10.5194/isprs-archives-XLII-3-W11-67-2020
Page Range:pp. 67-72
Publisher:ISPRS
ISSN:1682-1750
Status:Published
Keywords:Remote sensing, inland water, chl-a, bio-optical modeling, inversion, WASI
Event Title:PECORA 21/ISRSE 38 Joint Meeting
Event Location:Baltimore, Maryland, USA
Event Type:international Conference
Event Dates:6.-11. Oct. 2019
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):Vorhaben Spectroscopic Methods in Remote Sensing (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Experimental Methods
Deposited By: Gege, Dr.rer.nat. Peter
Deposited On:05 Nov 2020 11:13
Last Modified:10 Nov 2020 13:50

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