They waited, squatting low, watching the dirty water trickle from the big pipe and down the drainage stream.
To quantitatively measure landscape features we used several classical geomorphic indices (spacing ratio, hypsometric curves and integral, stream frequency drainage, stream length-gradient).
Open image in new window Fig. 2 The drainage stream ordering of Swarnrekha river watershed Open image in new window Fig. 3 Plot of inverse linear relationship between drainage networks.
Plots were located at random bearings at a distance of 1, 3, 5, 7 and 9 m from the mouth of the riparian drainage streams, as most leaf litter exported into lakes is derived from within this distance of streams67.
It given by Horton (1945) as T = 0.2821frac{{P^{0.5} }{{A} (6 For morphometric analysis, area, perimeter, maximum length of watershed, drainage network, stream length of each order and number of streams of each order and watershed relief values are required.
The areal aspects considered for the present study include areal extent, length, shape, drainage density, stream frequency and length of overland flow.
ArcGIS software was utilized to calculate measures such as number of streams, length of streams, area and length of watersheds, and elevation ranges and were made use to estimate a number of parameters relating to linear (bifurcation ratio, length ratio), areal (drainage density, stream frequency, shape, length of overland flow, etc).
Linear parameters consist of bifurcation ratio, drainage density, stream frequency, drainage texture and length of overland flow.
The morphometric parameters, i.e., drainage density, stream frequency, bifurcation ratio, texture ratio, length of overland flow, form factor, circularity ratio, elongation ratio, basin shape and compactness coefficient are also termed as erosion risk assessment parameters and have been used for prioritizing sub-watersheds (Biswas et al. 1999).
This study focuses on the morphotectonics of the Makuyuni catchment with an analysis of topography, drainage networks, stream longitudinal profiles and lineaments.
The three are linked, perhaps fatefully, by a shared water supply, and they lie like small islands in a great sea of surrounding farmlands — land reclaimed by drainage and stream diversion from an original waterfowl paradise of marsh and open water.
