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| Created: | Feb 06, 2023 at 9:01 p.m. | |
| Last updated: | Feb 06, 2023 at 9:01 p.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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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
Content
Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.1007/s10040-020-02197-9 |
| Depth | 500 |
| Scale | < 1000 km² |
| 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
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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