Spatial association of soil salinity with topography, land use and land cover in the Aghanasini estuary

K.S. PRATHIBHA; V.B. KULIGOD; HEBBARA MANJUNATHA; M.B. DODDAMANI; H.T. CHANDRANATHA

doi:10.61475/jfm.v34i03.320

K.S. PRATHIBHA Department of Soil Science and Agricultural Chemistry,niversity of Agricultural Sciences, Dharwad-580 005, Karnataka, India
V.B. KULIGOD Department of Soil Science and Agricultural Chemistry,niversity of Agricultural Sciences, Dharwad-580 005, Karnataka, India
HEBBARA MANJUNATHA Institute of Organic Farming,niversity of Agricultural Sciences, Dharwad-580 005, Karnataka, India
M.B. DODDAMANI Department of Environmental Science,niversity of Agricultural Sciences, Dharwad-580 005, Karnataka, India
H.T. CHANDRANATHA Directorate of Post Graduate Studies, College of Agriculture, Dharwad,niversity of Agricultural Sciences, Dharwad-580 005, Karnataka, India

DOI: https://doi.org/10.61475/jfm.v34i03.320

Keywords: Aghanashini estuary, Elevation, Land use, Land cover, Spatial association

Abstract

A study was conducted to understand the relationship between land elevation, land use/land cover and soilsalinity in coastal cultivated soils of Aghanashini estuary of Uttara Kannada district, Karnataka. Soil salinity was estimatedduring pre-monsoon (April-May) and post-monsoon (November-December) of 2018 and 2019 by random surface samplecollection and analysis. Soil salinity polygons were drawn and overlaid on topography, land use and land cover spatial databy using Arc GIS software to understand the pattern and its spatial relations. Land elevation had significantly influenced thesurfacesoil salinity. The lands situated inlower elevations (0 - 25 m above MSL) had higher soil salinity (> 8dSm-1)compared to lands on higher elevations (> 75 m above MSL). Among different land uses, aquaculture (prawn farming), wetland, mangrove and mud flat exhibited higher soil salinity of >8 dS m-1.