GroMoPo Metadata for Nassau County SEAWAT model

Authors:

GroMoPo Daniel Zamrsky

Owners:

gromopo_admin

Type:

Resource

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The size of this resource is 1.7 KB

Created:

Feb 06, 2023 at 9:01 p.m.

Last updated:

Feb 06, 2023 at 9:01 p.m.

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Abstract

A methodology is proposed to define indices for quantifying risks under the threat of reducing in groundwater levels, the existence of saltwater intrusion (SWI), and an increasing nitrate contamination load in submarine groundwater discharge (SGD). The proposed methodology considers coastal regions under geological heterogeneity and it is tested on a groundwater system in Nassau County of Long Island, New York (USA). The numerical model is constructed with the SEAWAT code. The parameter uncertainty of this model is evaluated by coupling the Latin hypercube sampling method (as a sampling algorithm) and Monte Carlo simulation to consider the uncertainty in both hydraulic conductivity and recharge rate. The indices are presented in spatial maps that classify areas of risk to potential threats. The results show that two of the water districts have a high risk under conditions of decreasing groundwater level. Salinity occurs in the southern and southwestern parts of the Nassau County aquifer and a considerable area of high risk of SWI is identified. Furthermore, the average SGD rate with the associated fluxes of nitrate is estimated as 81.4 million m(3)/year (average 0.8 tons of nitrate through SGD per year), which can adversely affect the quality of life in the local coastal ecosystems. The framework developed in this study could help the water district managers to identify high-risk areas for short-term and long-term planning and is applicable to other coastal settings.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

United States

North Latitude

40.7800°

East Longitude

-73.5600°

South Latitude

40.5400°

West Longitude

-73.7200°

Streets Terrain Satelite

Spatial Extent

Content

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Additional Metadata

Name	Value
DOI	10.1007/s10040-020-02197-9
Depth	500
Scale	< 1000 kmÂ²
Layers	11-15 layers
Purpose	groundwater resources;scientific investigation;salt water intrusion
GroMoPo_ID	25
IsVerified	True
Model Code	SEAWAT
Model Link	https://doi.org/10.1007/s10040-020-02197-9
Model Time	2000-2018
Model Year	2020
Model Authors	Mohammad Karamouz, Davood Mahmoodzadeh, Gualbert H. P. Oude Essink
Model Country	United States
Data Available	report/paper only;Geological input available;a 3D geological schematization in the article
Developer Email	karamouz@ut.ac.ir
Dominant Geology	unconsolidated
Developer Country	Iran
Publication Title	A risk-based groundwater modeling framework in coastal aquifers: a case study on Long Island, New York, USA
Original Developer	No
Additional Information
Integration or Coupling	Solute transport
Evaluation or Calibration	static water levels;contaminant concentrations
Geologic Data Availability

How to Cite

GroMoPo, D. Zamrsky (2023). GroMoPo Metadata for Nassau County SEAWAT model, HydroShare, http://www.hydroshare.org/resource/825cd68856814fb4bcdf61dc7fed345f

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

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

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