Validation of Horton's Law of Linear Aspects of Drainage Basin: A Case Study of Western Doon of Dehra, Uttrakhand (India)

TAJVIR

Validation of Horton's Law of Linear Aspects of Drainage Basin: A Case Study of Western Doon of Dehra, Uttrakhand (India)

Author(s)	TAJVIR
Country	INDIA
Abstract	The advancement of quantitative techniques has changed the traditional ways of geomorphologic studies. The study of landforms has increasing trend of measurement, analysis and drawing inferences. The quantitative description in landform studies have helped in getting the role of variables like structure of Rock lithology and precipitation in the evolution of landscape and drainage systems. Present study is an attempt to draw some inferences from the review of linear features of the drainage basin in the western Doon of Dehra, while validating Horton's laws relating to linear aspects of drainage. Topographical sheets are the data base of study. Rotameter has been used to measure the length of the drainage system. Drainage network is ordered according to Strahler's modifications over the Horton (1945) system of drainage ordering. Accordingly, Asan is the 6th order stream in Western Doon of Dehra. There are 7 fifth order streams. Investigation reveals a close relationship between orders and numbers of stream, orders and mean length of streams, orders and mean cumulative length streams. The plotting of steam order on the abscissa on an arithmetic scale against the stream - numbers or different types of stream - lengths on the ordinate on logarithmic scale shows a linear relationship for different orders in the basins. Regression equations have also been drawn for Asan and its fifth order tributaries. Coefficient of determination R2, which is the measure of nearness of independent variable to dependent variable has also been calculated for Asan and all the fifth order streams. R2 = 0.996 for Asan river indicates that 99.6% of total variation in stream numbers is explained by stream order alone. While studying, stream -orders and mean stream- lengths; It has been found out that the value of coefficient of determination is quite high in Asan and all the fifth order streams, except Bin and Upper Asan, where it is respectively 0.855 and 0.863. Low percentage of unexplained variables indicates the validation of the second law of Horton regarding stream orders and mean stream lengths. Unexplained variables indicate the structural control incidences of river capture or tectonic disturbances in this geomorphic unit.
Keywords	Asan, Bin, Bifurcation, Horton, Regression, Ratio
Field	Physical Science
Published In	Volume 4, Issue 6, November-December 2022
Published On	2022-11-18
Cite This	Validation of Horton's Law of Linear Aspects of Drainage Basin: A Case Study of Western Doon of Dehra, Uttrakhand (India) - TAJVIR - IJFMR Volume 4, Issue 6, November-December 2022.

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Validation of Horton's Law of Linear Aspects of Drainage Basin: A Case Study of Western Doon of Dehra, Uttrakhand (India)

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