Deltaic Sedimentary Environments in the Niger Delta, Nigeria

Chinotu Franklin George (Corresponding Author), David I. M. Macdonald, Matteo Spagnolo

Research output: Contribution to journalArticle

Abstract

This study is focused on the geomorphology of surface sedimentary environments contained in the fluvial, tidal and wave-dominated areas of the Niger Delta. GIS techniques applied to high-quality Landsat and SPOT images were used to identify and map landforms and processes, as well as quantitatively characterise their metrics and spatial distribution. A detailed analysis shows that the extent of the Niger Delta is 70,000 km2, contrary to previous publications that reported 75,000 km2. The delta has also been remapped and classified into mega sedimentary environments: the upper deltaic plain is 69% of the total extent, while the lower deltaic plain and delta front are 25% and 6% respectively. Other subunits were distinguished and mapped within the upper deltaic plain such as fluvial channels, point bars, braid bars, oxbow lakes, and other lakes. Tidal channels, beaches and spits were identified in the lower deltaic plain and delta front. The geometries of these sedimentary bodies (landforms) appear to be relatively scale-invariant, thus meaning that from the measurement of some dimensional parameters (e.g. the length) it is possible to estimate all others (e.g. the width and overall extent). This is an aspect of great relevance in subsurface analyses where it is often difficult to predict the extent of sedimentary bodies. The correlation between channel width and length (r2 = 0.9), is the strongest relationship found between sedimentary body metrics.

Original languageEnglish
JournalJournal of African Earth Sciences
Early online date14 Aug 2019
DOIs
Publication statusE-pub ahead of print - 14 Aug 2019

Fingerprint

landform
oxbow lake
tidal channel
spit
SPOT
geomorphology
Landsat
beach
GIS
spatial distribution
geometry
plain
lake
analysis
parameter

Keywords

  • sedimentary environments
  • Niger Delta
  • geomorphic units
  • landforms
  • recent sand body geometries
  • deltaic analogues

Cite this

Deltaic Sedimentary Environments in the Niger Delta, Nigeria. / George, Chinotu Franklin (Corresponding Author); Macdonald, David I. M.; Spagnolo, Matteo.

In: Journal of African Earth Sciences, 14.08.2019.

Research output: Contribution to journalArticle

@article{ce5b1a8c06fa41b4bcdb53b84a07f242,
title = "Deltaic Sedimentary Environments in the Niger Delta, Nigeria",
abstract = "This study is focused on the geomorphology of surface sedimentary environments contained in the fluvial, tidal and wave-dominated areas of the Niger Delta. GIS techniques applied to high-quality Landsat and SPOT images were used to identify and map landforms and processes, as well as quantitatively characterise their metrics and spatial distribution. A detailed analysis shows that the extent of the Niger Delta is 70,000 km2, contrary to previous publications that reported 75,000 km2. The delta has also been remapped and classified into mega sedimentary environments: the upper deltaic plain is 69{\%} of the total extent, while the lower deltaic plain and delta front are 25{\%} and 6{\%} respectively. Other subunits were distinguished and mapped within the upper deltaic plain such as fluvial channels, point bars, braid bars, oxbow lakes, and other lakes. Tidal channels, beaches and spits were identified in the lower deltaic plain and delta front. The geometries of these sedimentary bodies (landforms) appear to be relatively scale-invariant, thus meaning that from the measurement of some dimensional parameters (e.g. the length) it is possible to estimate all others (e.g. the width and overall extent). This is an aspect of great relevance in subsurface analyses where it is often difficult to predict the extent of sedimentary bodies. The correlation between channel width and length (r2 = 0.9), is the strongest relationship found between sedimentary body metrics.",
keywords = "sedimentary environments, Niger Delta, geomorphic units, landforms, recent sand body geometries, deltaic analogues",
author = "George, {Chinotu Franklin} and Macdonald, {David I. M.} and Matteo Spagnolo",
year = "2019",
month = "8",
day = "14",
doi = "10.1016/j.jafrearsci.2019.103592",
language = "English",
journal = "Journal of African Earth Sciences",
issn = "1464-343X",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Deltaic Sedimentary Environments in the Niger Delta, Nigeria

AU - George, Chinotu Franklin

AU - Macdonald, David I. M.

AU - Spagnolo, Matteo

PY - 2019/8/14

Y1 - 2019/8/14

N2 - This study is focused on the geomorphology of surface sedimentary environments contained in the fluvial, tidal and wave-dominated areas of the Niger Delta. GIS techniques applied to high-quality Landsat and SPOT images were used to identify and map landforms and processes, as well as quantitatively characterise their metrics and spatial distribution. A detailed analysis shows that the extent of the Niger Delta is 70,000 km2, contrary to previous publications that reported 75,000 km2. The delta has also been remapped and classified into mega sedimentary environments: the upper deltaic plain is 69% of the total extent, while the lower deltaic plain and delta front are 25% and 6% respectively. Other subunits were distinguished and mapped within the upper deltaic plain such as fluvial channels, point bars, braid bars, oxbow lakes, and other lakes. Tidal channels, beaches and spits were identified in the lower deltaic plain and delta front. The geometries of these sedimentary bodies (landforms) appear to be relatively scale-invariant, thus meaning that from the measurement of some dimensional parameters (e.g. the length) it is possible to estimate all others (e.g. the width and overall extent). This is an aspect of great relevance in subsurface analyses where it is often difficult to predict the extent of sedimentary bodies. The correlation between channel width and length (r2 = 0.9), is the strongest relationship found between sedimentary body metrics.

AB - This study is focused on the geomorphology of surface sedimentary environments contained in the fluvial, tidal and wave-dominated areas of the Niger Delta. GIS techniques applied to high-quality Landsat and SPOT images were used to identify and map landforms and processes, as well as quantitatively characterise their metrics and spatial distribution. A detailed analysis shows that the extent of the Niger Delta is 70,000 km2, contrary to previous publications that reported 75,000 km2. The delta has also been remapped and classified into mega sedimentary environments: the upper deltaic plain is 69% of the total extent, while the lower deltaic plain and delta front are 25% and 6% respectively. Other subunits were distinguished and mapped within the upper deltaic plain such as fluvial channels, point bars, braid bars, oxbow lakes, and other lakes. Tidal channels, beaches and spits were identified in the lower deltaic plain and delta front. The geometries of these sedimentary bodies (landforms) appear to be relatively scale-invariant, thus meaning that from the measurement of some dimensional parameters (e.g. the length) it is possible to estimate all others (e.g. the width and overall extent). This is an aspect of great relevance in subsurface analyses where it is often difficult to predict the extent of sedimentary bodies. The correlation between channel width and length (r2 = 0.9), is the strongest relationship found between sedimentary body metrics.

KW - sedimentary environments

KW - Niger Delta

KW - geomorphic units

KW - landforms

KW - recent sand body geometries

KW - deltaic analogues

UR - https://linkinghub.elsevier.com/retrieve/pii/S1464343X19302456

UR - http://www.mendeley.com/research/deltaic-sedimentary-environments-niger-delta-nigeria

U2 - 10.1016/j.jafrearsci.2019.103592

DO - 10.1016/j.jafrearsci.2019.103592

M3 - Article

JO - Journal of African Earth Sciences

JF - Journal of African Earth Sciences

SN - 1464-343X

ER -