Morphometric Analysis Using Geospatial Techniques: A Case Study from Halayapura Micro-Watershed of Tumkur District, Karnataka, India
N. Manoj
Department of Agricultural Engineering, University of Agricultural Sciences, Bangalore, India.
K. S. Rajashekarappa
Department of Agricultural Engineering, University of Agricultural Sciences, Bangalore, India.
H. G. Ashoka
Directorate of Research, University of Agricultural Sciences, Bangalore, India.
K. Devaraja
AICRP on Dry Land Agriculture, University of Agricultural Sciences, Bangalore, India.
Md. Majeed Pasha *
WDPD, Project, College of Horticulture Bidar, India.
*Author to whom correspondence should be addressed.
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.
Keywords: Water management action plans, subsoil material, geospatial techniques, groundwater recharge