Identification of Erosion Prone Areas by Morphometric Analysis Using GIS

Abstract

This study was undertaken to determine the priority watersheds for conservation of natural resources of the Haharo sub catchment in the Damodar catchment of upper Damodar valley area having an area of 565 km 2 involving four watersheds in Jharkhand State in eastern India by morphometric analysis using topographical maps on a scale of 1:50,000. To define the morphometric features of the watershed, the topographic information of the study area at 1:50,000 scaled are taken for analysis with the help of GIS tools. The topographical information derived from this map is utilized for calculating parameters and fixing of priority of watershed for suggesting conservation measures. The parameters computed include the morphometric parameters like bifurcation ratio, drainage density, stream frequency, texture ratio, and three basin shape parameters i.e., form factor, circularity ratio, and elongation ratio. A rating was done for each of these parameters according to their value. Average of all these parameter for each watershed is calculated to determine the priority. Among the four watersheds 4/4 was the highest priority area where conservation measure has to be taken first then watershed 4/3. Watershed 4/1 was the medium priority area and watershed 4/2 was the low priority area.

Soil erosion in future scenario using CMIP5 models and earth observation datasets

“…Therefore, the consequences of these climate and land use changes are essential to quantify the soil erosion rate for sustainable agricultural and environmental development. In India, almost 167 Mha of the area is found vulnerable to water and wind erosion (Das, 2014). Food and Agriculture Organization (FAO) reported that 25 to 40 billion tons of topsoil are degraded every year and it eventually impact the crop yield and soil properties (Montanarella et al, 2015).…”

The Implementation of a Hybrid Model for Hilly Sub-Watershed Prioritization Using Morphometric Variables: Case Study in India

“…The authors suggested different thematic maps integrated with morphometric variables to determine the suitable areas for citing water and soil conservation measures. In India, several studies on watershed prioritization have been performed based on morphometric analysis using the potential of RS and GIS techniques [15][16][17][18][19][20][21][22].…”

Comparisons of Watershed Delineation of River Network Representation and Morphometric Analysis in Karnaphuli River Basin, Chittagong, Bangladesh: A study with Different Digital Elevation Model (DEM)

“…The average value of the bifurcation ratio (Rb) can be determined by determining the average value of the bifurcation ratio (Rb) for a given channel network. According to Table 2 the calculated values for the studied watersheds are 1.95 and 2.45 for SRTM and ATER, accordingly has a similarity with (D. Das, 2014). These values are most common in locations where geologic structure has little effect on drainage patterns.…”