Constructed Wetlands as a Landscape Management Practice for Nutrient Removal from Agricultural Runoff—A Local Practice Case on the East Coast of Taiwan

Runoff with excessive nutrients from rice paddy fields that releases into the Pacific Ocean has been a possible cause of water body pollution and harm to marine life. Constructed wetlands had developed for decades but were rarely implemented in treating agricultural pollution in Taiwan. Moreover, th...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Chung-Yu Hsu, Guo-En Yan, Kuang-Chi Pan, Kuang-Chung Lee
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	constructed wetlands nutrient nitrogen phosphorus landscape management agricultural runoff Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/213edc7b13474adebd0a76170c82916a
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:213edc7b13474adebd0a76170c82916a
record_format	dspace
spelling	oai:doaj.org-article:213edc7b13474adebd0a76170c82916a2021-11-11T19:53:11ZConstructed Wetlands as a Landscape Management Practice for Nutrient Removal from Agricultural Runoff—A Local Practice Case on the East Coast of Taiwan10.3390/w132129732073-4441https://doaj.org/article/213edc7b13474adebd0a76170c82916a2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/2973https://doaj.org/toc/2073-4441Runoff with excessive nutrients from rice paddy fields that releases into the Pacific Ocean has been a possible cause of water body pollution and harm to marine life. Constructed wetlands had developed for decades but were rarely implemented in treating agricultural pollution in Taiwan. Moreover, the environmental policies haven’t provided enough instructions, support, or compensation for the establishment of this practice. The rice paddy field that was chosen in this study is located in Xinshe, Taiwan. It is close to the Pacific Ocean where coral reefs are nearby and fishery resource is abundant. In this study, the northern half of the whole organic field was chosen, and the contributing area is approximately 1 × 10<sup>5</sup> m<sup>2</sup>. Four plots of constructed wetlands (approximately 17.5 m wide, 16.7 m long, and 0.2 m deep each, covering 1164.74 m<sup>2</sup> of the total area) and employing surface flow were established as CW treatment. Water spinach (<i>Ipomoea aquatica</i>) was used for treating the nutrient runoff from organic rice paddy fields. Water samples of input and output of constructed wetlands were collected during 51 days of the experimental period (from the first day of rice transplantation to 10-days before harvest). Ammonia, nitrate, nitrite, phosphate, and total phosphorus concentrations were analyzed to calculate the nutrient load. The runoff of rice paddy fields without constructed wetlands was also sampled as a reference (RPF treatment). In average, about 54.3% ammonia and 42.7% nitrate was removed from the runoff that went through the CW treatment, while 4.2% ammonia and 51.3% nitrate increase were found at the output of the RPF treatment. Meanwhile, 35.6% of total phosphorus and 29.5% of phosphate were removed from the runoff of constructed wetlands. Only 16.4% total phosphorus and 6.4% phosphate were removed from the RPF treatment. Results indicate that constructed wetlands are promising treatment for agricultural runoff and the result can be used as a reference for the future environmental policies enactment in Taiwan.Chung-Yu HsuGuo-En YanKuang-Chi PanKuang-Chung LeeMDPI AGarticleconstructed wetlandsnutrientnitrogenphosphoruslandscape managementagricultural runoffHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 2973, p 2973 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	constructed wetlands nutrient nitrogen phosphorus landscape management agricultural runoff Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	constructed wetlands nutrient nitrogen phosphorus landscape management agricultural runoff Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Chung-Yu Hsu Guo-En Yan Kuang-Chi Pan Kuang-Chung Lee Constructed Wetlands as a Landscape Management Practice for Nutrient Removal from Agricultural Runoff—A Local Practice Case on the East Coast of Taiwan
description	Runoff with excessive nutrients from rice paddy fields that releases into the Pacific Ocean has been a possible cause of water body pollution and harm to marine life. Constructed wetlands had developed for decades but were rarely implemented in treating agricultural pollution in Taiwan. Moreover, the environmental policies haven’t provided enough instructions, support, or compensation for the establishment of this practice. The rice paddy field that was chosen in this study is located in Xinshe, Taiwan. It is close to the Pacific Ocean where coral reefs are nearby and fishery resource is abundant. In this study, the northern half of the whole organic field was chosen, and the contributing area is approximately 1 × 10<sup>5</sup> m<sup>2</sup>. Four plots of constructed wetlands (approximately 17.5 m wide, 16.7 m long, and 0.2 m deep each, covering 1164.74 m<sup>2</sup> of the total area) and employing surface flow were established as CW treatment. Water spinach (<i>Ipomoea aquatica</i>) was used for treating the nutrient runoff from organic rice paddy fields. Water samples of input and output of constructed wetlands were collected during 51 days of the experimental period (from the first day of rice transplantation to 10-days before harvest). Ammonia, nitrate, nitrite, phosphate, and total phosphorus concentrations were analyzed to calculate the nutrient load. The runoff of rice paddy fields without constructed wetlands was also sampled as a reference (RPF treatment). In average, about 54.3% ammonia and 42.7% nitrate was removed from the runoff that went through the CW treatment, while 4.2% ammonia and 51.3% nitrate increase were found at the output of the RPF treatment. Meanwhile, 35.6% of total phosphorus and 29.5% of phosphate were removed from the runoff of constructed wetlands. Only 16.4% total phosphorus and 6.4% phosphate were removed from the RPF treatment. Results indicate that constructed wetlands are promising treatment for agricultural runoff and the result can be used as a reference for the future environmental policies enactment in Taiwan.
format	article
author	Chung-Yu Hsu Guo-En Yan Kuang-Chi Pan Kuang-Chung Lee
author_facet	Chung-Yu Hsu Guo-En Yan Kuang-Chi Pan Kuang-Chung Lee
author_sort	Chung-Yu Hsu
title	Constructed Wetlands as a Landscape Management Practice for Nutrient Removal from Agricultural Runoff—A Local Practice Case on the East Coast of Taiwan
title_short	Constructed Wetlands as a Landscape Management Practice for Nutrient Removal from Agricultural Runoff—A Local Practice Case on the East Coast of Taiwan
title_full	Constructed Wetlands as a Landscape Management Practice for Nutrient Removal from Agricultural Runoff—A Local Practice Case on the East Coast of Taiwan
title_fullStr	Constructed Wetlands as a Landscape Management Practice for Nutrient Removal from Agricultural Runoff—A Local Practice Case on the East Coast of Taiwan
title_full_unstemmed	Constructed Wetlands as a Landscape Management Practice for Nutrient Removal from Agricultural Runoff—A Local Practice Case on the East Coast of Taiwan
title_sort	constructed wetlands as a landscape management practice for nutrient removal from agricultural runoff—a local practice case on the east coast of taiwan
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/213edc7b13474adebd0a76170c82916a
work_keys_str_mv	AT chungyuhsu constructedwetlandsasalandscapemanagementpracticefornutrientremovalfromagriculturalrunoffalocalpracticecaseontheeastcoastoftaiwan AT guoenyan constructedwetlandsasalandscapemanagementpracticefornutrientremovalfromagriculturalrunoffalocalpracticecaseontheeastcoastoftaiwan AT kuangchipan constructedwetlandsasalandscapemanagementpracticefornutrientremovalfromagriculturalrunoffalocalpracticecaseontheeastcoastoftaiwan AT kuangchunglee constructedwetlandsasalandscapemanagementpracticefornutrientremovalfromagriculturalrunoffalocalpracticecaseontheeastcoastoftaiwan
_version_	1718431396669685760

Constructed Wetlands as a Landscape Management Practice for Nutrient Removal from Agricultural Runoff—A Local Practice Case on the East Coast of Taiwan

Ejemplares similares