GroMoPo Metadata for Mekong Delta SEAWAT model

Authors:

GroMoPo Daniel Zamrsky

Owners:

gromopo_admin

Type:

Resource

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The size of this resource is 1.8 KB

Created:

Feb 07, 2023 at 6:32 p.m.

Last updated:

Feb 07, 2023 at 6:33 p.m.

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Abstract

Groundwater salinization is one of the most severe environmental problems in coastal aquifers worldwide, causing exceeding salinity in groundwater supply systems for many purposes. High salinity concentration in groundwater can be detected several kilometers inland and may result in an increased risk for coastal water supply systems and human health problems. This study investigates the impacts of groundwater pumping practices and regional groundwater flow dynamics on groundwater flow and salinity intrusion in the coastal aquifers of the Vietnamese Mekong Delta using the SEAWAT model-a variable-density groundwater flow and solute transport model. The model was constructed in three dimensions (3D) and accounted for multi-aquifers, variation of groundwater levels in neighboring areas, pumping, and paleo-salinity. Model calibration was carried for 13 years (2000 to 2012), and validation was conducted for 4 years (2013 to 2016). The best-calibrated model was used to develop prediction models for the next 14 years (2017 to 2030). Six future scenarios were introduced based on pumping rates and regional groundwater levels. Modeling results revealed that groundwater pumping activities and variation of regional groundwater flow systems strongly influence groundwater level depletion and saline movement from upper layers to lower layers. High salinity (>2.0 g/L) was expected to expand downward up to 150 m in depth and 2000 m toward surrounding areas in the next 14 years under increasing groundwater pumping capacity. A slight recovery in water level was also observed with decreasing groundwater exploitation. The reduction in the pumping rate from both local and regional scales will be necessary to recover groundwater levels and protect fresh aquifers from expanding paleo-saline in groundwater.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Vietnam

North Latitude

9.9438°

East Longitude

106.2507°

South Latitude

9.2338°

West Longitude

105.5515°

Streets Terrain Satelite

Spatial Extent

Content

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Additional Metadata

Name	Value
DOI	10.1007/s11356-021-16282-3
Depth	400
Scale	< 10 000 kmÂ²
Layers	11-15 layers
Purpose	groundwater resources;salt water intrusion
GroMoPo_ID	79
IsVerified	True
Model Code	SEAWAT
Model Link	https://doi.org/10.1007/s11356-021-16282-3
Model Time	2000-2016
Model Year	2021
Model Authors	Dang An Tran, Maki Tsujimura, Hai V. Pham, Tam V. Nguyen, Loc Huu Ho, Phu Le Vo, Khai Quang Ha, Thanh Duc Dang, Doan Van Binh, Quang-Van Doan
Model Country	Vietnam
Data Available	report/paper only;Geological input available;Geological cross-section in paper
Developer Email	antd@tlu.edu.vn
Dominant Geology	unconsolidated
Developer Country	Vietnam
Publication Title	Intensified salinity intrusion in coastal aquifers due to groundwater overextraction: a case study in the Mekong Delta, Vietnam
Original Developer	No
Additional Information
Integration or Coupling	Solute transport
Evaluation or Calibration	dynamic water levels
Geologic Data Availability

How to Cite

GroMoPo, D. Zamrsky (2023). GroMoPo Metadata for Mekong Delta SEAWAT model, HydroShare, http://www.hydroshare.org/resource/f133498e06c14257b299d8ba211456a2

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

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

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