Morphometric Analysis Using Geospatial Techniques: A Case Study from Halayapura Micro-Watershed of Tumkur District, Karnataka, India

Abstract

Plans for land and water management in the Tumkur district of Karnataka's Halayapura micro-watershed were created using geospatial tools. The examination of morphological traits in a micro-watershed employed Arc GIS software. According to the current study, the drainage system had a dendritic design with trunk order 4. The micro-watershed has a maximum area of 503 ha, a maximum length of 4.40 km, and a maximum width of 2.20 km. The bifurcation ratio had a mean value of 2.5. It shows that there have been less structural disturbances to the micro-watershed. The region has permeable subsurface material, according to the drainage density value of 0.851 km. The micro-watershed is becoming closer to the watershed's elongated shape, according to the form factor value. The groundwater that can be used is 41.7 mm (70% of the expected recharge of 59.6 mm), and the recharge factor that was discovered was 7%. This indicates that 256.0 mm of water is total accessible resource, which includes soil moisture store, utilisable runoff, and recharge. Currently, 19.4% of the usable runoff is being used, and harvesting and conservation buildings are encouraging 9% of the extra water.