Measurement of Water Level in Urban Streams under Bad Weather Conditions

Flood control and water resources management require monitoring the water level in rivers and streams. Water level measurement techniques increasingly consider image processing procedures. Most of the systems use a staff gauge to support the waterline detection. However, these techniques can fail wh...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Joaquim Amândio Azevedo, João André Brás
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	urban monitoring water stream channels water level measurement image processing Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/3199c10e574f431884837786e025e9f1
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:3199c10e574f431884837786e025e9f1
record_format	dspace
spelling	oai:doaj.org-article:3199c10e574f431884837786e025e9f12021-11-11T19:09:16ZMeasurement of Water Level in Urban Streams under Bad Weather Conditions10.3390/s212171571424-8220https://doaj.org/article/3199c10e574f431884837786e025e9f12021-10-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/21/7157https://doaj.org/toc/1424-8220Flood control and water resources management require monitoring the water level in rivers and streams. Water level measurement techniques increasingly consider image processing procedures. Most of the systems use a staff gauge to support the waterline detection. However, these techniques can fail when applied to urban stream channels due to water undulation, debris on the water surface, and traces of rain captured by the camera, and other adverse effects on images can be quite dramatic on the results. The importance of considering these effects is that they are usually associated with the variation in the water level with the occurrence of rain. The technique proposed in this work uses a larger detection zone to minimize the effects that tend to obstruct the waterline. The developed system uses an infrared camera to operate during the day and night. Images acquired in different weather conditions helped to evaluate the proposed technique. The water level measurement accuracy was about 1.8 cm for images taken during the day and 2.8 cm for images taken at night. During short periods of heavy rain, the accuracy was 2.6 cm for the daytime and 3.4 cm for the nighttime. Infrared lighting can improve detection accuracy at night. The developed technique provides good accuracy under different weather conditions by combining information from various detection positions to deal with waterline detection issues.Joaquim Amândio AzevedoJoão André BrásMDPI AGarticleurban monitoringwater stream channelswater level measurementimage processingChemical technologyTP1-1185ENSensors, Vol 21, Iss 7157, p 7157 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	urban monitoring water stream channels water level measurement image processing Chemical technology TP1-1185
spellingShingle	urban monitoring water stream channels water level measurement image processing Chemical technology TP1-1185 Joaquim Amândio Azevedo João André Brás Measurement of Water Level in Urban Streams under Bad Weather Conditions
description	Flood control and water resources management require monitoring the water level in rivers and streams. Water level measurement techniques increasingly consider image processing procedures. Most of the systems use a staff gauge to support the waterline detection. However, these techniques can fail when applied to urban stream channels due to water undulation, debris on the water surface, and traces of rain captured by the camera, and other adverse effects on images can be quite dramatic on the results. The importance of considering these effects is that they are usually associated with the variation in the water level with the occurrence of rain. The technique proposed in this work uses a larger detection zone to minimize the effects that tend to obstruct the waterline. The developed system uses an infrared camera to operate during the day and night. Images acquired in different weather conditions helped to evaluate the proposed technique. The water level measurement accuracy was about 1.8 cm for images taken during the day and 2.8 cm for images taken at night. During short periods of heavy rain, the accuracy was 2.6 cm for the daytime and 3.4 cm for the nighttime. Infrared lighting can improve detection accuracy at night. The developed technique provides good accuracy under different weather conditions by combining information from various detection positions to deal with waterline detection issues.
format	article
author	Joaquim Amândio Azevedo João André Brás
author_facet	Joaquim Amândio Azevedo João André Brás
author_sort	Joaquim Amândio Azevedo
title	Measurement of Water Level in Urban Streams under Bad Weather Conditions
title_short	Measurement of Water Level in Urban Streams under Bad Weather Conditions
title_full	Measurement of Water Level in Urban Streams under Bad Weather Conditions
title_fullStr	Measurement of Water Level in Urban Streams under Bad Weather Conditions
title_full_unstemmed	Measurement of Water Level in Urban Streams under Bad Weather Conditions
title_sort	measurement of water level in urban streams under bad weather conditions
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3199c10e574f431884837786e025e9f1
work_keys_str_mv	AT joaquimamandioazevedo measurementofwaterlevelinurbanstreamsunderbadweatherconditions AT joaoandrebras measurementofwaterlevelinurbanstreamsunderbadweatherconditions
_version_	1718431575265247232

Measurement of Water Level in Urban Streams under Bad Weather Conditions

Ejemplares similares