2794 KB0 KB197320252023Tran Thi, Vanštevilka:3letnik:67str. 343-362ISSN:0351-0271DOI:10.15292/geodetski-vestnik.2023.03.343-362COBISSID_HOST:167706627URN:URN:NBN:SI:doc-NJX0060IenZveza geodetov SlovenijeGeodetski vestnikcorrelationkorelacijakvaliteta voderegresijaregressionspectral bandsprektralni paswater qualityWQIAssessment of Dau Tieng reservoir water quality using standard criteria combined with remotely sensed images| Ocena kakovosti vode v zbiralniku Dau Tieng na podlagi standardnih kriterijev v kombinaciji z daljinskim zaznavanjem slik|Water quality (WQ) pollution is a matter of concern to everyone, and it is necessary to take remedial measures to protect human life. This paper presents the assessment of surface WQ through the Water Quality Index (WQI) followed by the Vietnam Standard QCVN 08-MT:2015/ BTNMT combined with satellite data for the Dau Tieng reservoir. The implementation method is based on the correlation of each WQ indicator with the spectral features of satellite images to build a regression function, simulating the spatial distribution of the entire reservoir. The Sentinel2A satellite images were used with reflective bands in the visible and near-infrared (NIR) spectrum region. The regression functions showed that the correlation of the WQ indicators was related to single bands, and the band ratios include blue and NIR, red/blue, green/blue, and NIR/blue bands. Simulation results of the WQI spatial distribution expressed that the WQ of the Dau Tieng reservoir was in a polluted state at the level of WQI fluctuation in the range of 0–50 for the most part. Dau Tieng irrigation system plays a vital role in the water distribution system for Tay Ninh province and the southern key economic region. Therefore, appropriate treatment measures should be taken if it needs to be used for domestic water supply purposesKakovost vode (WQ) je skrb vseh, zato je treba sprejeti sanacijske ukrepe za zaščito človeških življenj. V tem prispevku je predstavljena ocena kakovosti površinskih voda na podlagi indeksa kakovosti vode (WQI) po vietnamskem standardu QCVN 08-MT:2015/BTNMT v kombinaciji s satelitskimi podatki za zbiralnik Dau Tieng. Metoda izvajanja temelji na korelaciji vseh kazalnikov kakovosti vode s spektralnimi značilnostmi satelitskih posnetkov za oblikovanje regresijske funkcije, ki simulira prostorsko porazdelitev celotnega rezervoarja. Uporabljeni so bili satelitski posnetki Sentinel-2A z odsevnimi pasovi v vidnem in bližnjem infrardečem (NIR) spektralnem območju. Regresijske funkcije so pokazale, da je korelacija kazalnikov WQ povezana s posameznimi pasovi, razmerja med pasovi pa vključujejo modre in NIR, rdeče/modre, zelene/modre ter NIR/modre pasove. Rezultati simulacije prostorske porazdelitve WQI so pokazali, da je voda v rezervoarju Dau Tieng večinoma onesnažena, pri čemer je indeks WQI v razponu od 0 do 50. Namakalni sistem Dau Tieng ima pomembno vlogo v sistemu distribucije vode za provinco Tay Ninh in pomembno južno gospodarsko regijo. Zato je treba pred njegovo morebitno uporabo za oskrbo gospodinjstev z vodo sprejeti ustrezne ukrepe za čiščenjeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaZveza geodetov Slovenije