Informing Environmental Flow Planning through Landscape Evolution Modeling in Heavily Modified Urban Rivers in China

Worldwide, urban rivers suffer various degrees of ecological degradation. Rehabilitating heavily modified urban rivers requires holistic approaches, including environmental flow management. We examine the case of Lower Yongding River, Beijing’s mother river, which had dried up since the 1980s and is...

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Autores principales:	Minghao Wu, Hong Wu, Andrew T. Warner, Hao Li, Zhicheng Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	stream ecological rehabilitation environmental flow landscape evolution simulation CAESAR-Lisflood habitat suitability Yongding River Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/e7b097858502450db16aa4a575b8d215
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spelling	oai:doaj.org-article:e7b097858502450db16aa4a575b8d2152021-11-25T19:15:55ZInforming Environmental Flow Planning through Landscape Evolution Modeling in Heavily Modified Urban Rivers in China10.3390/w132232442073-4441https://doaj.org/article/e7b097858502450db16aa4a575b8d2152021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/22/3244https://doaj.org/toc/2073-4441Worldwide, urban rivers suffer various degrees of ecological degradation. Rehabilitating heavily modified urban rivers requires holistic approaches, including environmental flow management. We examine the case of Lower Yongding River, Beijing’s mother river, which had dried up since the 1980s and is undergoing a flow replenishment experiment, receiving 342 million m<sup>3</sup> of water during 2019–2020 for ecosystem enhancement. Considering the massive cost of replenishment, we address the urgent need to evaluate its outcomes and inform future management through an interdisciplinary modeling approach under the circumstance of severe data shortage. We simulated the study reach’s landscape evolution under five flow scenarios and assessed their ecological effects using the CAESAR-Lisflood model and habitat suitability index method. Despite overall minor morphological differences across scenarios, individual reaches presented pronounced physical changes. Higher-flow scenarios shaped a distinct channel in certain reaches, but historic channel modifications by mining and farming caused minimal responses in others. Additionally, higher-flow scenarios generally created larger and more evenly distributed habitat areas but showed a low payback given the higher flow volumes needed. Targeted channel-floodplain geomorphological restoration is essential for flows to generate desired ecological outcomes. The demonstrated modeling framework offers great promise, informing future rehabilitation actions for heavily modified urban streams.Minghao WuHong WuAndrew T. WarnerHao LiZhicheng LiuMDPI AGarticlestream ecological rehabilitationenvironmental flowlandscape evolution simulationCAESAR-Lisfloodhabitat suitabilityYongding RiverHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3244, p 3244 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	stream ecological rehabilitation environmental flow landscape evolution simulation CAESAR-Lisflood habitat suitability Yongding River Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	stream ecological rehabilitation environmental flow landscape evolution simulation CAESAR-Lisflood habitat suitability Yongding River Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Minghao Wu Hong Wu Andrew T. Warner Hao Li Zhicheng Liu Informing Environmental Flow Planning through Landscape Evolution Modeling in Heavily Modified Urban Rivers in China
description	Worldwide, urban rivers suffer various degrees of ecological degradation. Rehabilitating heavily modified urban rivers requires holistic approaches, including environmental flow management. We examine the case of Lower Yongding River, Beijing’s mother river, which had dried up since the 1980s and is undergoing a flow replenishment experiment, receiving 342 million m<sup>3</sup> of water during 2019–2020 for ecosystem enhancement. Considering the massive cost of replenishment, we address the urgent need to evaluate its outcomes and inform future management through an interdisciplinary modeling approach under the circumstance of severe data shortage. We simulated the study reach’s landscape evolution under five flow scenarios and assessed their ecological effects using the CAESAR-Lisflood model and habitat suitability index method. Despite overall minor morphological differences across scenarios, individual reaches presented pronounced physical changes. Higher-flow scenarios shaped a distinct channel in certain reaches, but historic channel modifications by mining and farming caused minimal responses in others. Additionally, higher-flow scenarios generally created larger and more evenly distributed habitat areas but showed a low payback given the higher flow volumes needed. Targeted channel-floodplain geomorphological restoration is essential for flows to generate desired ecological outcomes. The demonstrated modeling framework offers great promise, informing future rehabilitation actions for heavily modified urban streams.
format	article
author	Minghao Wu Hong Wu Andrew T. Warner Hao Li Zhicheng Liu
author_facet	Minghao Wu Hong Wu Andrew T. Warner Hao Li Zhicheng Liu
author_sort	Minghao Wu
title	Informing Environmental Flow Planning through Landscape Evolution Modeling in Heavily Modified Urban Rivers in China
title_short	Informing Environmental Flow Planning through Landscape Evolution Modeling in Heavily Modified Urban Rivers in China
title_full	Informing Environmental Flow Planning through Landscape Evolution Modeling in Heavily Modified Urban Rivers in China
title_fullStr	Informing Environmental Flow Planning through Landscape Evolution Modeling in Heavily Modified Urban Rivers in China
title_full_unstemmed	Informing Environmental Flow Planning through Landscape Evolution Modeling in Heavily Modified Urban Rivers in China
title_sort	informing environmental flow planning through landscape evolution modeling in heavily modified urban rivers in china
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/e7b097858502450db16aa4a575b8d215
work_keys_str_mv	AT minghaowu informingenvironmentalflowplanningthroughlandscapeevolutionmodelinginheavilymodifiedurbanriversinchina AT hongwu informingenvironmentalflowplanningthroughlandscapeevolutionmodelinginheavilymodifiedurbanriversinchina AT andrewtwarner informingenvironmentalflowplanningthroughlandscapeevolutionmodelinginheavilymodifiedurbanriversinchina AT haoli informingenvironmentalflowplanningthroughlandscapeevolutionmodelinginheavilymodifiedurbanriversinchina AT zhichengliu informingenvironmentalflowplanningthroughlandscapeevolutionmodelinginheavilymodifiedurbanriversinchina
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Informing Environmental Flow Planning through Landscape Evolution Modeling in Heavily Modified Urban Rivers in China

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