Impact of Island Urbanization on Freshwater Lenses: A Case Study on a Small Coral Island

Freshwater resources on small coral islands mainly exist in the form of freshwater lenses. The freshwater lens is highly vulnerable to salinization due to natural recharge variations and urbanization construction. However, it is unclear how a freshwater lens evolves under the influence of urbanizati...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Zihan Ling, Longcang Shu, Ying Sun, Ran Wang, Yuxi Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	freshwater lens small coral island numerical simulation urbanization Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/47bae94d94194b20bd2f5aa989011e3b
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:47bae94d94194b20bd2f5aa989011e3b
record_format	dspace
spelling	oai:doaj.org-article:47bae94d94194b20bd2f5aa989011e3b2021-11-25T19:16:14ZImpact of Island Urbanization on Freshwater Lenses: A Case Study on a Small Coral Island10.3390/w132232722073-4441https://doaj.org/article/47bae94d94194b20bd2f5aa989011e3b2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/22/3272https://doaj.org/toc/2073-4441Freshwater resources on small coral islands mainly exist in the form of freshwater lenses. The freshwater lens is highly vulnerable to salinization due to natural recharge variations and urbanization construction. However, it is unclear how a freshwater lens evolves under the influence of urbanization construction and which factors control its evolution. Based on the hydrogeological data of a small coral island in China, a corresponding 3D numerical model was established by the Visual MODFLOW software to investigate the formation and evolution of freshwater lenses under natural conditions. Thereby, the island reclamation scenario and impermeable surface scenario were set up and the changes in morphology and volume of the freshwater lens were analyzed. The results show the following: (1) After island reclamation and island building, the freshwater lens would reach a stable state after 25 years and the freshwater lens would also appear in the newly added part of the island with a thickness of 9.5 m, while the volume of the total freshwater lens would increase to 1.22 times that of the original island. (2) When the impermeable surface is built at different positions of the island, the reduction in the volume of the freshwater lens, in the order from large to small, is Scenario B (northeast side), Scenario A (southwest side) and Scenario C (central); with the increase in the impermeable surface area, the volume of the freshwater lens would gradually decrease and the volume of the freshwater lens would decrease by more than 50% with the impermeable surface exceeding 30% of the island area. The study has important implications for the conservation and rational development of subsurface freshwater resources on islands.Zihan LingLongcang ShuYing SunRan WangYuxi LiMDPI AGarticlefreshwater lenssmall coral islandnumerical simulationurbanizationHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3272, p 3272 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	freshwater lens small coral island numerical simulation urbanization Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	freshwater lens small coral island numerical simulation urbanization Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Zihan Ling Longcang Shu Ying Sun Ran Wang Yuxi Li Impact of Island Urbanization on Freshwater Lenses: A Case Study on a Small Coral Island
description	Freshwater resources on small coral islands mainly exist in the form of freshwater lenses. The freshwater lens is highly vulnerable to salinization due to natural recharge variations and urbanization construction. However, it is unclear how a freshwater lens evolves under the influence of urbanization construction and which factors control its evolution. Based on the hydrogeological data of a small coral island in China, a corresponding 3D numerical model was established by the Visual MODFLOW software to investigate the formation and evolution of freshwater lenses under natural conditions. Thereby, the island reclamation scenario and impermeable surface scenario were set up and the changes in morphology and volume of the freshwater lens were analyzed. The results show the following: (1) After island reclamation and island building, the freshwater lens would reach a stable state after 25 years and the freshwater lens would also appear in the newly added part of the island with a thickness of 9.5 m, while the volume of the total freshwater lens would increase to 1.22 times that of the original island. (2) When the impermeable surface is built at different positions of the island, the reduction in the volume of the freshwater lens, in the order from large to small, is Scenario B (northeast side), Scenario A (southwest side) and Scenario C (central); with the increase in the impermeable surface area, the volume of the freshwater lens would gradually decrease and the volume of the freshwater lens would decrease by more than 50% with the impermeable surface exceeding 30% of the island area. The study has important implications for the conservation and rational development of subsurface freshwater resources on islands.
format	article
author	Zihan Ling Longcang Shu Ying Sun Ran Wang Yuxi Li
author_facet	Zihan Ling Longcang Shu Ying Sun Ran Wang Yuxi Li
author_sort	Zihan Ling
title	Impact of Island Urbanization on Freshwater Lenses: A Case Study on a Small Coral Island
title_short	Impact of Island Urbanization on Freshwater Lenses: A Case Study on a Small Coral Island
title_full	Impact of Island Urbanization on Freshwater Lenses: A Case Study on a Small Coral Island
title_fullStr	Impact of Island Urbanization on Freshwater Lenses: A Case Study on a Small Coral Island
title_full_unstemmed	Impact of Island Urbanization on Freshwater Lenses: A Case Study on a Small Coral Island
title_sort	impact of island urbanization on freshwater lenses: a case study on a small coral island
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/47bae94d94194b20bd2f5aa989011e3b
work_keys_str_mv	AT zihanling impactofislandurbanizationonfreshwaterlensesacasestudyonasmallcoralisland AT longcangshu impactofislandurbanizationonfreshwaterlensesacasestudyonasmallcoralisland AT yingsun impactofislandurbanizationonfreshwaterlensesacasestudyonasmallcoralisland AT ranwang impactofislandurbanizationonfreshwaterlensesacasestudyonasmallcoralisland AT yuxili impactofislandurbanizationonfreshwaterlensesacasestudyonasmallcoralisland
_version_	1718410088106950656

Impact of Island Urbanization on Freshwater Lenses: A Case Study on a Small Coral Island

Ejemplares similares