Pumping Well Layout Scheme Design and Sensitivity Analysis of Total Critical Pumping Rates in Coral Island Based on Numerical Model

Groundwater on small coral islands exists in the form of freshwater lenses that serve as an important water resource for local inhabitants and ecosystems. These lenses are vulnerable to salinization due to groundwater abstraction and precipitation variation. Determination of the sustainable yield fr...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Ran Wang, Longcang Shu, Yuxi Li, Portia Annabelle Opoku
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	freshwater lens coral island sustainable exploitation sensitivity analysis Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/204162312cc94e1987245051bedc4d2a
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:204162312cc94e1987245051bedc4d2a
record_format	dspace
spelling	oai:doaj.org-article:204162312cc94e1987245051bedc4d2a2021-11-25T19:15:38ZPumping Well Layout Scheme Design and Sensitivity Analysis of Total Critical Pumping Rates in Coral Island Based on Numerical Model10.3390/w132232152073-4441https://doaj.org/article/204162312cc94e1987245051bedc4d2a2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/22/3215https://doaj.org/toc/2073-4441Groundwater on small coral islands exists in the form of freshwater lenses that serve as an important water resource for local inhabitants and ecosystems. These lenses are vulnerable to salinization due to groundwater abstraction and precipitation variation. Determination of the sustainable yield from freshwater lenses is challenging because the uncertainties of recharge and hydrogeological characteristics make it difficult to predict the lens response to long-term pumping. In this study, nine pumping well layout schemes along a line are designed using the orthogonal experimental design method, and an optimal well layout scheme is determined by multi-index range analysis and comprehensive balance analysis method. The total critical pumping rates of the freshwater lens corresponding to different schemes are calculated by numerical simulation, and the sensitivity of the total critical pumping rates to hydrogeological parameters is analyzed. The results show that the calculation of the total critical pumping rates needs to be combined with the specific well layout scheme with consideration to the length of well screens, the number of wells and the distance between wells. The difference in total critical pumping rates between different schemes can be up to three times. The uncertainty of hydrogeological parameters has a great impact on the total critical pumping rates. Within the range of a 30% reduction in parameters, <i>α</i> and <i>K</i> are the key risk factors of pumping; within the range of a 30% increase in parameters, <i>α</i>, <i>n<sub>e</sub></i> and <i>K</i> are the key risk factors; <i>α</i>-<i>n<sub>e</sub></i> combined changes had the greatest impact. The management of freshwater lenses and the assessment of sustainable yield will continue to be important tasks for coral islands in the future, and this study can help with the sustainable exploitation of island freshwater lenses.Ran WangLongcang ShuYuxi LiPortia Annabelle OpokuMDPI AGarticlefreshwater lenscoral islandsustainable exploitationsensitivity analysisHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3215, p 3215 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	freshwater lens coral island sustainable exploitation sensitivity analysis Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	freshwater lens coral island sustainable exploitation sensitivity analysis Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Ran Wang Longcang Shu Yuxi Li Portia Annabelle Opoku Pumping Well Layout Scheme Design and Sensitivity Analysis of Total Critical Pumping Rates in Coral Island Based on Numerical Model
description	Groundwater on small coral islands exists in the form of freshwater lenses that serve as an important water resource for local inhabitants and ecosystems. These lenses are vulnerable to salinization due to groundwater abstraction and precipitation variation. Determination of the sustainable yield from freshwater lenses is challenging because the uncertainties of recharge and hydrogeological characteristics make it difficult to predict the lens response to long-term pumping. In this study, nine pumping well layout schemes along a line are designed using the orthogonal experimental design method, and an optimal well layout scheme is determined by multi-index range analysis and comprehensive balance analysis method. The total critical pumping rates of the freshwater lens corresponding to different schemes are calculated by numerical simulation, and the sensitivity of the total critical pumping rates to hydrogeological parameters is analyzed. The results show that the calculation of the total critical pumping rates needs to be combined with the specific well layout scheme with consideration to the length of well screens, the number of wells and the distance between wells. The difference in total critical pumping rates between different schemes can be up to three times. The uncertainty of hydrogeological parameters has a great impact on the total critical pumping rates. Within the range of a 30% reduction in parameters, <i>α</i> and <i>K</i> are the key risk factors of pumping; within the range of a 30% increase in parameters, <i>α</i>, <i>n<sub>e</sub></i> and <i>K</i> are the key risk factors; <i>α</i>-<i>n<sub>e</sub></i> combined changes had the greatest impact. The management of freshwater lenses and the assessment of sustainable yield will continue to be important tasks for coral islands in the future, and this study can help with the sustainable exploitation of island freshwater lenses.
format	article
author	Ran Wang Longcang Shu Yuxi Li Portia Annabelle Opoku
author_facet	Ran Wang Longcang Shu Yuxi Li Portia Annabelle Opoku
author_sort	Ran Wang
title	Pumping Well Layout Scheme Design and Sensitivity Analysis of Total Critical Pumping Rates in Coral Island Based on Numerical Model
title_short	Pumping Well Layout Scheme Design and Sensitivity Analysis of Total Critical Pumping Rates in Coral Island Based on Numerical Model
title_full	Pumping Well Layout Scheme Design and Sensitivity Analysis of Total Critical Pumping Rates in Coral Island Based on Numerical Model
title_fullStr	Pumping Well Layout Scheme Design and Sensitivity Analysis of Total Critical Pumping Rates in Coral Island Based on Numerical Model
title_full_unstemmed	Pumping Well Layout Scheme Design and Sensitivity Analysis of Total Critical Pumping Rates in Coral Island Based on Numerical Model
title_sort	pumping well layout scheme design and sensitivity analysis of total critical pumping rates in coral island based on numerical model
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/204162312cc94e1987245051bedc4d2a
work_keys_str_mv	AT ranwang pumpingwelllayoutschemedesignandsensitivityanalysisoftotalcriticalpumpingratesincoralislandbasedonnumericalmodel AT longcangshu pumpingwelllayoutschemedesignandsensitivityanalysisoftotalcriticalpumpingratesincoralislandbasedonnumericalmodel AT yuxili pumpingwelllayoutschemedesignandsensitivityanalysisoftotalcriticalpumpingratesincoralislandbasedonnumericalmodel AT portiaannabelleopoku pumpingwelllayoutschemedesignandsensitivityanalysisoftotalcriticalpumpingratesincoralislandbasedonnumericalmodel
_version_	1718410078284939264

Pumping Well Layout Scheme Design and Sensitivity Analysis of Total Critical Pumping Rates in Coral Island Based on Numerical Model

Ejemplares similares