Morphometric analysis for Peddavagu a tributary of Krishna river, Nalgonda dist., A.P., India

The analysis of drainage morphometry is usually a prerequisite to the assessment of hydrological characteristics of surface water basin. The basin morphometric parameters such as linear and aerial aspects of the river basin were determined and computed. The study performed manual and computerized delineation and drainage sampling, which enables applying detailed morphological measures. The measurement of drainage parameters provides the Hydrologist & Geomorphologist with the useful tool for numerical measure of landscape dissection & runoff potential. Evaluation of the characteristics of the drainage network of a basin using quantitative morphometric analysis can give information about the hydrological nature of the rocks exposed within the drainage basin. A drainage map of a basin provides a reliable index of the permeability of the rocks and also gives an indication of the yield of the basin. The yield of a basin is the flow per unit area and normally includes surface-water flows unless mentioned otherwise. Normally, such an analysis of drainage basins involves the evaluation of drainage parameters such as bifurcation ratio, length ratio, drainage density, constant of channel maintenance, length of overland flow and stream frequency. Hydrogeological observations, integrated with drainage analysis, provides useful clues on topography and underlying geological structures.

The drainage map of the Peddavagu watershed, prepared from the survey of India topographic sheet number 56 0/8/SW. The Peddavagu basin was analysed for stream-order analysis, basin length, stream frequency, bifurcation ratio (Rb), stream length ratio (R1), drainage density (Dd), constant of channel maintenance (1/Dd), lengh of over land flow (Lg) and stream frequency (F). Dimensionless factors such as Form factor (Ff), Elongation Ration (Re), Circulatory ratio (Rc). Measures involves height or Relief, Relief ratios and slope.