Computation of diffusion coefficients for water of Ghauthami Godavari estuary using one-dimensional advection-diffusion model

Abstract

<span style="font-size: 12.0pt;font-family:" times="" new="" roman";color:black;mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">An analysis of salinity, salt budget and diffusion coefficients based on the salinity data of Gauthami Godavari estuary for three different months (Nov. '95 Jan. '96, April '96) representing different seasons has been carried out. Diffusion coefficients vary quite randomly with distance between 90 - 4050 <span style="mso-bidi-font-style:italic">m²<i>/</i>s<i> </i>for consecutive months during Nov. '95 - Jan. '96 and between 10-869 <span style="mso-bidi-font-style:italic">m²<i>/</i>s<i> </i>for Jan. '96 - April. '96. The mean values of diffusion coefficients are found to be 1510 <span style="mso-bidi-font-style:italic">m²<i>/</i>s<i> </i>for consecutive months during Nov. '95 - Jan. '96, 174 <span style="mso-bidi-font-style: italic">m²<i>/</i>s<i> </i>for Jan. '96-April '96 and are attributed to the river run-off. The undulations in diffusion coefficients reflect the topographic features. The estuarine salt budget shows an increase of salt content by 62% from Nov. '95 - Jan. '96 and 32% from Jan. '96 - April.

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