GroMoPo Metadata for Jeju Island MODFLOW model

Authors:

GroMoPo E. Leijnse

Owners:

gromopo_admin

Type:

Resource

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The size of this resource is 2.0 KB

Created:

Feb 08, 2023 at 4:48 a.m.

Last updated:

Feb 08, 2023 at 4:49 a.m.

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Abstract

Numerical groundwater models were used to assess groundwater sustainability on Jeju Island, South Korea, for various climate and groundwater withdrawal scenarios. Sustainability criteria included groundwater-level elevation, spring flows, and salinity. The latter was studied for the eastern sector of the island where saltwater intrusion is significant. Model results suggest that there is a need to revise the current estimate of sustainable yield of 1.77 x 10(6) m(3)/day. At the maximum extraction of 84 % of the sustainable yield, a 10-year drought scenario would decrease spring flows by 28 %, dry up 27 % of springs, and decrease hydraulic head by an island-wide average of 7 m. Head values are particularly sensitive to changes in recharge in the western parts of the island, due to the relatively low hydraulic conductivity of fractured volcanic aquifers and increased groundwater extraction for irrigation. Increases in salinity are highest under drought conditions around the current 2-m head contour line, with an estimated increase of up to 9 g/L under 100 % sustainable-yield use. The study lists recommendations towards improving the island's management of potable groundwater resources. However, results should be treated with caution given the available data limitations and the simplifying assumptions of the numerical modeling approaches.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

South Korea

North Latitude

33.5060°

East Longitude

126.9299°

South Latitude

33.2422°

West Longitude

126.1966°

Streets Terrain Satelite

Spatial Extent

Content

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Additional Metadata

Name	Value
DOI	10.1007/s10040-013-1084-y
Depth	250
Scale
Layers	4
Purpose	Groundwater resources;Salt water intrusion
GroMoPo_ID	215
IsVerified	True
Model Code	MODFLOW;SEAWAT
Model Link	https://doi.org/10.1007/s10040-013-1084-y
Model Time	SS (1992 - 2009)
Model Year	2014
Model Authors	El-Kadi, AI; Tillery, S; Whittier, RB; Hagedorn, B; Mair, A; Ha, K; Koh, GW
Model Country	South Korea
Data Available	Report/paper only
Developer Email	elkadi@hawaii.edu
Dominant Geology	Model focuses on multiple geologic materials
Developer Country	USA; South Korea
Publication Title	Assessing sustainability of groundwater resources on Jeju Island, South Korea, under climate change, drought, and increased usage
Original Developer	No
Additional Information	Numerical groundwater models were used to assess groundwater sustainability on Jeju Island, South Korea, for various climate and groundwater withdrawal scenarios. Sustainability criteria included groundwater- level elevation, spring flows, and salinity. The latter was studied for the eastern sector of the island where saltwater intrusion is significant.
Integration or Coupling	Water use;Water management
Evaluation or Calibration	Dynamic water levels
Geologic Data Availability	Yes

How to Cite

GroMoPo, E. Leijnse (2023). GroMoPo Metadata for Jeju Island MODFLOW model, HydroShare, http://www.hydroshare.org/resource/c62136d386a84482b52450911838db96

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/

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