Non-point source pollution and long-term effects of best management measures simulated in the Qifeng River Basin in the karst area of Southwest China

Non-point source (NPS) pollution has caused serious threats to water quality on a global scale. However, the investigation using a single measure with multi-scenarios for the long-term simulation in karst agricultural watershed is still lacking. In this study, the Annualized Agricultural Non-Point S...

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Autores principales:	Liang Liying, Qin Litang, Peng Guangsheng, Zeng Honghu, Liu Zheng, Yang Jianwen
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	annagnps bmps karst area non-point source pollutions spatiotemporal characteristic Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
Acceso en línea:	https://doaj.org/article/64c808ccebef4d409d674165de3f01e5
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spelling	oai:doaj.org-article:64c808ccebef4d409d674165de3f01e52021-11-06T07:05:44ZNon-point source pollution and long-term effects of best management measures simulated in the Qifeng River Basin in the karst area of Southwest China1606-97491607-079810.2166/ws.2020.310https://doaj.org/article/64c808ccebef4d409d674165de3f01e52021-02-01T00:00:00Zhttp://ws.iwaponline.com/content/21/1/262https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798Non-point source (NPS) pollution has caused serious threats to water quality on a global scale. However, the investigation using a single measure with multi-scenarios for the long-term simulation in karst agricultural watershed is still lacking. In this study, the Annualized Agricultural Non-Point Source Pollution (AnnAGNPS) model was developed to verify the applicability in a karst agricultural watershed. Then, the model was used to determine the best management measures (BMPs) and the reduction rate characteristics under long-term effects (about 10 years) in the watershed. The AnnAGNPS model perform well in simulating in NPS pollution with R2 (0.95 for runoff, 0.93 for TN, and 0.93 for TP, respectively) and NSE (0.95 for runoff, 0.53 for TN, and 0.57 for TP, respectively). The output of total nitrogen (TN) and total phosphorus (TP) primarily occurred in the rainy season (up to 80%). The loss of mass of TN and TP were mainly observed in orchards and woodlands in the upstream of each sub-basin. The results from AnnAGNPS model demonstrated that different BMPs had significant impacts on the reduction of NPS pollution. Furthermore, a same BMPs measure showed it was closely related to land use in the watershed. In the Qifeng River watershed, stubble tillage (ST) showed to be useful with relatively good reduction rates (16.64% for sediment, 17.85% for TN, and 17.80% for TP, respectively). The simulation results indicated that AnnAGNPS was a valuable tool after validation for the planning and management of the watershed in karst areas.Liang LiyingQin LitangPeng GuangshengZeng HonghuLiu ZhengYang JianwenIWA Publishingarticleannagnpsbmpskarst areanon-point source pollutionsspatiotemporal characteristicWater supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 1, Pp 262-275 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	annagnps bmps karst area non-point source pollutions spatiotemporal characteristic Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
spellingShingle	annagnps bmps karst area non-point source pollutions spatiotemporal characteristic Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 Liang Liying Qin Litang Peng Guangsheng Zeng Honghu Liu Zheng Yang Jianwen Non-point source pollution and long-term effects of best management measures simulated in the Qifeng River Basin in the karst area of Southwest China
description	Non-point source (NPS) pollution has caused serious threats to water quality on a global scale. However, the investigation using a single measure with multi-scenarios for the long-term simulation in karst agricultural watershed is still lacking. In this study, the Annualized Agricultural Non-Point Source Pollution (AnnAGNPS) model was developed to verify the applicability in a karst agricultural watershed. Then, the model was used to determine the best management measures (BMPs) and the reduction rate characteristics under long-term effects (about 10 years) in the watershed. The AnnAGNPS model perform well in simulating in NPS pollution with R2 (0.95 for runoff, 0.93 for TN, and 0.93 for TP, respectively) and NSE (0.95 for runoff, 0.53 for TN, and 0.57 for TP, respectively). The output of total nitrogen (TN) and total phosphorus (TP) primarily occurred in the rainy season (up to 80%). The loss of mass of TN and TP were mainly observed in orchards and woodlands in the upstream of each sub-basin. The results from AnnAGNPS model demonstrated that different BMPs had significant impacts on the reduction of NPS pollution. Furthermore, a same BMPs measure showed it was closely related to land use in the watershed. In the Qifeng River watershed, stubble tillage (ST) showed to be useful with relatively good reduction rates (16.64% for sediment, 17.85% for TN, and 17.80% for TP, respectively). The simulation results indicated that AnnAGNPS was a valuable tool after validation for the planning and management of the watershed in karst areas.
format	article
author	Liang Liying Qin Litang Peng Guangsheng Zeng Honghu Liu Zheng Yang Jianwen
author_facet	Liang Liying Qin Litang Peng Guangsheng Zeng Honghu Liu Zheng Yang Jianwen
author_sort	Liang Liying
title	Non-point source pollution and long-term effects of best management measures simulated in the Qifeng River Basin in the karst area of Southwest China
title_short	Non-point source pollution and long-term effects of best management measures simulated in the Qifeng River Basin in the karst area of Southwest China
title_full	Non-point source pollution and long-term effects of best management measures simulated in the Qifeng River Basin in the karst area of Southwest China
title_fullStr	Non-point source pollution and long-term effects of best management measures simulated in the Qifeng River Basin in the karst area of Southwest China
title_full_unstemmed	Non-point source pollution and long-term effects of best management measures simulated in the Qifeng River Basin in the karst area of Southwest China
title_sort	non-point source pollution and long-term effects of best management measures simulated in the qifeng river basin in the karst area of southwest china
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/64c808ccebef4d409d674165de3f01e5
work_keys_str_mv	AT liangliying nonpointsourcepollutionandlongtermeffectsofbestmanagementmeasuressimulatedintheqifengriverbasininthekarstareaofsouthwestchina AT qinlitang nonpointsourcepollutionandlongtermeffectsofbestmanagementmeasuressimulatedintheqifengriverbasininthekarstareaofsouthwestchina AT pengguangsheng nonpointsourcepollutionandlongtermeffectsofbestmanagementmeasuressimulatedintheqifengriverbasininthekarstareaofsouthwestchina AT zenghonghu nonpointsourcepollutionandlongtermeffectsofbestmanagementmeasuressimulatedintheqifengriverbasininthekarstareaofsouthwestchina AT liuzheng nonpointsourcepollutionandlongtermeffectsofbestmanagementmeasuressimulatedintheqifengriverbasininthekarstareaofsouthwestchina AT yangjianwen nonpointsourcepollutionandlongtermeffectsofbestmanagementmeasuressimulatedintheqifengriverbasininthekarstareaofsouthwestchina
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Non-point source pollution and long-term effects of best management measures simulated in the Qifeng River Basin in the karst area of Southwest China

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