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Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.39 [2010] >
IJMS Vol.39(3) [September 2010] >
| Title: | Textural characteristics of the surface sediments of a Tropical mangrove ecosystem Gulf of Kachchh, Gujarat, India |
| Authors: | Kumar, Goutam
Ramanathan, AL
Rajkumar, K |
| Keywords: | Grain size
Mangroves
Gulf of Kachchh
Gujarat |
| Issue Date: | Sep-2010 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Mangroves in gulf of Kachchh, Gujarat, India has been studied for grain
size spectrum and textural parameters namely phi mean, standard deviation,
skewness and kurtosis. Grain size spectrum shows a marked variation in the
upstream riverine input stretch. Variation of energy conditions is controlled
by the fluvial profile in the channel. Textural pattern shows complicated
profile as a result of the fluctuation in the physico-chemical conditions due
to fluvial-marine interaction. Abundance of very fine sand to fine sand shows
the prevalence of comparatively low energy condition in the mangrove creek
zones. Linear
Discriminate Function Analysis (LDF) of the samples indicates shallow marine
environment origin for all samples collected from this mangrove ecosystem. Riverine sediments show a wide range of
textural facies including muddy sand. It has also been observed that a
progressive enrichment of silty-sand in the downstream region. CM diagram
(C= one percentile in microns, M=Median in microns) of Gulf of Kachchh
sediments suggests that deposition takes place by (1) rolling (2) rolling and
suspension and (3) graded suspension. Rolling and suspension population is
dominant in the river/creeks deposits, which is also supported by uniform grain
size distribution of sediment load augmented by turbidity current. |
| Page(s): | 415-422 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1033 (Online); 0379-5136 (Print) |
| Source: | IJMS Vol.39(3) [September 2010]
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