International Journal of Innovative Research and Development

Abstract

Most river sediments are polymodal and the peak heights shift from upstream (-0.04f and 1.24f) to downstream (0.29f and 1.17f), whereas the beach sediments show much reduced complexity (2.61f). The river sediments are coarse sand (0.3f - 1.24f) poorly sorted (1.73f - 2.82f), coarse skewed (-0.3 to 0.78) and mesokurtic (2.9) in upstream and leptokurtic in downstream (5.15), whereas the textural parameters of beach sediments show medium grain (2.61f) well sorting (1.4f), near symmetrically skewness (-0.13) and platykurtic (2.87). The effectiveness of bivariant plots is confined from the clear segregation of river and beach samples in the respective zones. The mean and skewness establish a negative correlation with standard deviation (r=-0.55). The distribution of the samples in the NOP sector in the CM diagram proves the prevalence of high energy environment in the river and graded suspension in the beach sediments. Visher’s log probability curves reveal the maximum traction population in the upstream, saltation in the downstream and excellent double saltation population in the beach. The linear discriminant values prepared from the statistical parameters have concurred with the respective environment in the present study. The sudden change in textural parameters, i.e. coarse grains in the river bed and medium grains in the beach are attributed to the possibilities of an additional source. The USGS Sedimentological Tool, Geostatistical analysis, CM pattern and Visher’s diagram also supplement such probabilities. 

Keywords

Full Text

Abstract

 Intensity of weathering can be measured by means of various indices and there is no strict scale of measure due to various factors involved in this process. Each and every index has its own merits and demerits like consideration of Mechanical agencies, Chemical processes or both. The oxidation state of iron in a weathering profile is influenced by the interaction between rock and groundwater. Clay Minerals, Carbonates and Oxidation of Iron content present in the detrital grains is the indicator of weathering during transportation and deposition. The presence of clay, Carbonates and Fe content in the upstream of Gadilam River basin are more and are declining towards the Beach. Common Quartz/Feldspar index, Resistant Minerals Zircon/Tourmaline index and less Resistant Mineral Amphibole /pyroxene Index are exhibiting influence of additional sources in the beach in addition with the river contribution. The USGS Sedimentological Tool, Geostatistical analysis, CM pattern and Visher’s diagram also supplement such probabilities.

Keywords

Full Text