Volume 16, No 2, 2019
Spatial Analysis Software For Morphometric Studies To Sub-Watershed Level Prioritization Of Talpona River In Goa, India
Anil Yedage , Tanavi Deshpande , Sagar Mali
Abstract
This study delves into the Talpona River located in Canacona taluka of Goa, encompassing an area of 183.024 sq. km and boasting a perimeter of 77 km. Positioned at 14°59’14” N latitude and 74°2’40” E longitude in the Talpona area of Canacona taluka, South Goa, the river is characterized by 2162 streams and a basin length of 31.67 km. The study area features rich soil cover, dense vegetation, and substantial annual rainfall, ensuring soil moisture retention for the majority of the year. For prioritization based on morphometric analysis utilizing GIS and remote sensing techniques, the study area is subdivided into 11 sub-watersheds (TSB-1 to TSB-11). The drainage density of sub-watersheds ranges from 3.49 to 7.19, with an elongation ratio varying from 0.44 to 0.75, indicating high relief and steep ground slopes. This variability is attributed to diverse slope, relief, and structural conditions within the sub-watershed. Calculation of compound parameter values is conducted, and the sub-watershed with the lowest compound parameter is accorded the highest priority. In this investigation, TSB-1, TSB-2, and TSB-7 are assigned the highest priority due to their elevated position and increased runoff. This prioritization serves as a valuable guide for efficient watershed management and conservation initiatives in the Talpona River region.
Pages: 459-470
Keywords: Talpona, Prioritization, watershed and Morphometric