Kernel Metadata Declaration — on demand
ISO 26324 asks a DOI Registration Agency to produce a Kernel Metadata Declaration for every DOI it issues. Give any DOI: its public record becomes a record in the Smart Scholars DOI Metadata Format 1.0, checked against every rule, and declared as the Kernel XML.
✓ Meets every rule of the format
The record below is complete and every controlled value is a DOI Attribute Value Set 2.3 spelling. The Declaration on the right follows DOIMetadataKernel.xsd element by element.
What the DOI identifies
Aquifer Vulnerability Assessment in Ekowe, Bayelsa State, Niger Delta Area, Nigeria using GIS-Based on Drastic Method
10.46243/jst.2021.v6.i3.pp37-44 · JournalArticle — an article in a journal · Digital · Visual · Language · en
Published 2021-05-20
Part of Journal of Science & Technology · ISSN 2456-5660 · vol. 06 · no. 03 · pp. 37–44
Principal agents
- Willabo A. Miepamo (author → Author)
- Bisong Andy Etta (author → Author)
- Justin Ikirigo (author → Author)
- Longman Publishers (publisher → Publisher)
Also in the record, outside the Kernel: the abstract, the licence, 4 links, 18 references. Source: Crossref (member 25296), registered 2026-09-12, last deposited 2026-09-20.
System metadata — ISO 26324:2025, Annex B · DOI Handbook 10.1
Each element by the standard's name and the Handbook's (in grey), read off the record.
| DOI Name DOI name | 10.46243/jst.2021.v6.i3.pp37-44 |
| Referent Type referentType | Creation |
| Referent Sub-Type referentSubType | JournalArticle — an article in a journal |
| Referent Name(s) referentName(s) | Aquifer Vulnerability Assessment in Ekowe, Bayelsa State, Niger Delta Area, Nigeria using GIS-Based on Drastic Method (PrincipalTitle, en) |
| Basic Metadata basicMetadata | author: Willabo A. Miepamo author: Bisong Andy Etta author: Justin Ikirigo publisher: Longman Publishers published: 2021-05-20 part of: Journal of Science & Technology · ISSN 2456-5660 · vol. 06 · no. 03 · pp. 37–44 language: en form: Digital · Visual · Language |
| Referent Identifier(s) alternateIdentifier(s) | none besides the DOI |
| Registration Authority registrationAuthorityCode | Crossref — issued by Crossref (member 25296); held here as a copy |
| Created Date issueDate | 2026-09-12 |
| relatedIdentifiers | none needed — the descriptive metadata is in this record |
The record
{
"format": "smartscholars-doi-metadata/1.0",
"doi": "10.46243/jst.2021.v6.i3.pp37-44",
"referent": "Creation",
"type": "JournalArticle",
"structural_type": "Digital",
"modes": [
"Visual"
],
"characters": [
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"titles": [
{
"value": "Aquifer Vulnerability Assessment in Ekowe, Bayelsa State, Niger Delta Area, Nigeria using GIS-Based on Drastic Method",
"type": "PrincipalTitle",
"lang": "en"
}
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"identifiers": [
{
"type": "DOI",
"value": "10.46243/jst.2021.v6.i3.pp37-44"
}
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"agents": [
{
"role": "author",
"name": {
"given": "Willabo A.",
"family": "Miepamo"
},
"sequence": "first"
},
{
"role": "author",
"name": {
"given": "Bisong Andy",
"family": "Etta"
},
"sequence": "additional"
},
{
"role": "author",
"name": {
"given": "Justin",
"family": "Ikirigo"
},
"sequence": "additional"
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{
"role": "publisher",
"name": {
"org": "Longman Publishers"
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"dates": {
"published": "2021-05-20",
"date_type": "PublicationDate",
"online": "2021-05-20"
},
"language": "en",
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"type": "Journal",
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{
"type": "ISSN",
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"medium": "electronic"
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"volume": "06",
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"pages": {
"first": "37",
"last": "44"
}
},
"links": [
{
"url": "https://www.jst.org.in/index.php/pub/article/view/881",
"return_type": "text/html",
"primary": true
},
{
"url": "https://www.jst.org.in/index.php/pub/article/download/881/808",
"purpose": "text-mining",
"return_type": "application/pdf"
},
{
"url": "https://www.jst.org.in/index.php/pub/article/download/881/2423",
"purpose": "text-mining",
"return_type": "application/xml"
},
{
"url": "https://www.jst.org.in/index.php/pub/article/view/881/808",
"purpose": "similarity-checking"
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],
"abstract": {
"value": "This study on aquifer vulnerability assessment in Ekowe town of Southern Ijaw Local Government Area of Bayelsa State, Niger Delta Area, Nigeria, adopted the use of DRASTIC method and geographic information system (GIS) model to delineate areas susceptible to contamination depending on the collective nature of the Seven hydro geologic parameters applied for the aquifer vulnerability evaluations which include depth to water table, net recharge, soil media, impact to vadoze zone, aquifer media, topography, and hydraulic conductivity. Data relating to the seven hydro geologic parameters of the model were obtained and transformed systematically by GIS to develop the DRASTIC vulnerability map which shows the three different forms of aquifer vulnerability namely high, moderate, and low zones. High vulnerable Areas is influenced mainly by high net recharge, shallow depth to water table, porosity of the sandstones in the aquifer media and permeability of the surface soil while the low vulnerability zone is domiciled with Straight slope, high depth to water table, presence of clay and silt in the soil and vadoze zone media, and the distinctive characteristics of the high and low vulnerability zones define the moderate vulnerable Areas.",
"lang": "en"
},
"license": {
"url": "https://creativecommons.org/licenses/by/4.0/",
"start": "2021-05-20",
"applies_to": "vor"
},
"references": [
{
"key": "ref1",
"doi": "10.21608/ejabf.2001.1687",
"unstructured": "Abdel-Satar, A. M. (2001). Environmental studies on the impact of the drains effluent upon the southern sector of Lake Manzalah. Egyptian Journal of Aquatic Biology, 5, 17-30"
},
{
"key": "ref2",
"doi": "10.1007/bf03326040",
"unstructured": "Adams, R. H., Guzmán-Osorio, F. J., & Zavala, C. J. (2008). Water repellency in oil contaminated sandy andclayey soils. International Journal of Environmental Science andTechnology, 5(4), 445-454. ["
},
{
"key": "ref3",
"unstructured": "Akana, T. S. George, G.C. and Oki, O.A.( 2002): Aquifer Vulnerability Assessment in Some Towns of Yenagoa, South-South Nigeria, Science and Technology 6: 15-23"
},
{
"key": "ref4",
"doi": "10.17491/jgsi/1987/290112",
"unstructured": "Aller, L. Bennet, T. Hehr, J. H.Petty, R. J. and Hackett, G. (1987): DRASTIC: A standardized system for evaluation groundwater pollution potential using hydrogeologic settings. United States Environmental Protection Agency, Ada. Ok, EPA, 455"
},
{
"key": "ref5",
"doi": "10.1016/j.apgeog.2003.08.007",
"unstructured": "Al-Adamat, R.A.N, Foster, I.D.L. and Baban, S.M.J. (2003): Groundwater vulnerability and risk mapping for the Basaltic aquifer of the Azraq basin of Jordan using GIS, remote sensing and DRASTIC. ApplGeogr 23:303–324"
},
{
"key": "ref6",
"doi": "10.5539/eer.v3n1p125",
"unstructured": "Amadi, A. N., and Nwankwoala, H. O. (2013). Evaluation of Heavy Metal in Soils FromEnyimba Dumpsite in Aba, Southeastern Nigeria Using Contamination Factor and Geo-Accumulation Index. Energy and Environment Research, 3(1), 125–134"
},
{
"key": "ref7",
"doi": "10.1007/s00254-006-0219-z",
"unstructured": "Baalousha, H. (2003): Vulnerability assessment for the Gaza Strip, Palestine usingDRASTIC. EnvGeol 50:405–414"
},
{
"key": "ref8",
"unstructured": "Etu-Efeotor, J.O.(1981): Preliminary hydrogeochemical investigation of subsurface waters in parts of the Niger Delta. J. Min. Geol. 18(1):103–105"
},
{
"key": "ref9",
"unstructured": "Etu-Efeotor, J. O. and Akpokodje, E. G. (1990): Aquifer Systems of the Niger Delta. Journal of Mining Geology, (26) (2): 28-36"
},
{
"key": "ref10",
"doi": "10.1007/s10661-007-0102-8",
"unstructured": "Karbassi, A. R., Monavari, S. M., Nabi-Bidhendi, G. R., Nouri, J., &Nematpour, K. (2008).Metal pollution assessment of sediment and water in the Shur River. Environmental Monitoring and Assessment, 147(2), 107-116"
},
{
"key": "ref11",
"doi": "10.1007/s00254-003-0803-4",
"unstructured": "Lee, S. (2003): Evaluation of waste disposal site using the DRASTIC system isouthern Korea. EnvGeol 44:654–664"
},
{
"key": "ref12",
"unstructured": "Ngah, S. A. (2002). Patterns of groundwater chemistry in parts of the Niger Delta.38th Annual International Conference of Nigerian Mining and Geosciences Society, Abstract, 39p"
},
{
"key": "ref13",
"unstructured": "Nwankwoala, H. O.,&Mmom, P. C. (2007).Towards sustainable management of Groundwater in the greater Port Harcourt metropolis.A paper presented at the15th annual conference of the Nigerian Environmental Society, held at the hotel presidential, Port Harcourt"
},
{
"key": "ref14",
"unstructured": "Nwankwoala, H. O. (2011). Coastal Aquifers of Nigeria: An Overview of its Management and Sustainability Considerations. Journal of Applied Technology in EnvironmentalSanitation, 1(4), 371-380"
},
{
"key": "ref15",
"unstructured": "Olujimi, J. A. B. (2010). The roles of the Stakeholders in the usage and management of the environment. A paper delivered at the Workshop on the Challenges of environment and the imperative of urban and rural development, held at the Federal University of Technology, Akure. 43 | Page"
},
{
"key": "ref16",
"doi": "10.1016/j.apgeog.2007.07.008",
"unstructured": "Rahman, A. (2008): A GIS based DRASTIC model for assessing groundwater vulnerability in shallow aquifer in Aligarh, India. ApplGeogr 28:32–53"
},
{
"key": "ref17",
"doi": "10.1306/5d25c0cf-16c1-11d7-8645000102c1865d",
"unstructured": "Short, K. C and Stauble, A. J. (1967): Outline of Geology of Niger delta: American Association of Petroleum Geologists Bulletin, 51: 761-779"
},
{
"key": "ref18",
"unstructured": "Udom, G.J. and Amah, E.A, (2006): Quality status of groundwater in Yenagoa and its environs, Bayelsa State, Nigeria. J. Sci. Indus. Stud. 4(1): 45–51"
}
],
"record": {
"registrant": "Longman Publishers",
"registered": "2026-09-12",
"updated": "2026-09-20",
"issue_number": 1,
"source": "crossref-api",
"source_agency": "Crossref (member 25296)"
}
}The Kernel Metadata Declaration
DOIMetadataKernel.xsd · namespace http://www.doi.org/2010/DOISchema · Attribute Value Sets 2.3 · draft — the agency's DOI name is filled in on accreditation
<?xml version="1.0" encoding="UTF-8"?>
<!-- DRAFT declaration: Smart Scholars is not yet a DOI Registration Agency. registrationAgencyDoiName is a marker (10.0/ is no RA's prefix) and is filled in on accreditation. -->
<kernelMetadata xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.doi.org/2010/DOISchema https://www.doi.org/doi_schemas/DOIMetadataKernel.xsd" xmlns="http://www.doi.org/2010/DOISchema">
<referentDoiName>10.46243/jst.2021.v6.i3.pp37-44</referentDoiName>
<primaryReferentType>Creation</primaryReferentType>
<registrationAgencyDoiName>10.0/smart-scholars-draft</registrationAgencyDoiName>
<issueDate>2026-10-04</issueDate>
<issueNumber>1</issueNumber>
<referentCreation>
<name primaryLanguage="en">
<value>Aquifer Vulnerability Assessment in Ekowe, Bayelsa State, Niger Delta Area, Nigeria using GIS-Based on Drastic Method</value>
<type>PrincipalTitle</type>
</name>
<identifier>
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<uri returnType="text/html" doesContentNegotiation="true">https://doi.org/10.46243/jst.2021.v6.i3.pp37-44</uri>
<type>DOI</type>
</identifier>
<identifier>
<uri returnType="text/html">https://www.jst.org.in/index.php/pub/article/view/881</uri>
<type>URI</type>
</identifier>
<identifier>
<uri>https://www.jst.org.in/index.php/pub/article/download/881/808</uri>
<type>URI</type>
</identifier>
<identifier>
<uri returnType="application/xml">https://www.jst.org.in/index.php/pub/article/download/881/2423</uri>
<type>URI</type>
</identifier>
<identifier>
<uri>https://www.jst.org.in/index.php/pub/article/view/881/808</uri>
<type>URI</type>
</identifier>
<structuralType>Digital</structuralType>
<mode>Visual</mode>
<character>Language</character>
<type>JournalArticle</type>
<principalAgent>
<name>
<value>Willabo A. Miepamo</value>
<type>PrincipalName</type>
</name>
<role>Author</role>
</principalAgent>
<principalAgent>
<name>
<value>Bisong Andy Etta</value>
<type>PrincipalName</type>
</name>
<role>Author</role>
</principalAgent>
<principalAgent>
<name>
<value>Justin Ikirigo</value>
<type>PrincipalName</type>
</name>
<role>Author</role>
</principalAgent>
<principalAgent>
<name>
<value>Longman Publishers</value>
<type>PrincipalName</type>
</name>
<role>Publisher</role>
</principalAgent>
<linkedCreation>
<name>
<value>Journal of Science & Technology</value>
<type>PrincipalTitle</type>
</name>
<identifier>
<nonUriValue>2456-5660</nonUriValue>
<type>ISSN</type>
</identifier>
<referentCreationRole>Part</referentCreationRole>
<referentCreationSequenceIdentifier>
<value>06</value>
<type>VolumeNumber</type>
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<referentCreationSequenceIdentifier>
<value>03</value>
<type>IssueNumber</type>
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<referentCreationSequenceIdentifier>
<value>37-44</value>
<type>PageNumber</type>
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</linkedCreation>
<language>en</language>
<languageOfReferentContent>
<language>en</language>
<languageOfReferentContentType>Original</languageOfReferentContentType>
</languageOfReferentContent>
<creationDate>
<date>2021-05-20</date>
<creationDateType>PublicationDate</creationDateType>
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</kernelMetadata>
