The Krishnai River, a tributary of the Brahmaputra River, India, is prone to frequent flooding. T... more The Krishnai River, a tributary of the Brahmaputra River, India, is prone to frequent flooding. The Krishnai River Basin, which has an area of 932.03 sq. km, is located between 26°4' N & 25°34' N and 90°20' E & 90°45' E, spanning four Indian districts: Goalpara (6.33%) in Assam and East Garo Hills (45.05%), West Garo Hills (7.61%), and North Garo Hills (40.99%) in Meghalaya. Existing literature on the Krishnai River Basin lacks detailed sub-watershed ranking based on compound parameters, which can be crucial for targeted watershed management and conservation efforts. Additionally, there is a need for more research that explicitly links morphometric parameters with practical watershed management strategies, providing actionable insights for policymakers and stakeholders. The study focuses on the entire Krishnai River Basin up to the confluence of the Krishnai and Dudhnai rivers before it joins the Brahmaputra River.
This study utilized Geographic Information System (GIS) and Remote Sensing (RS) techniques to extract and analyze morphometric parameters. Cartosat-1: DEM-Version-3R1 with a 32 m resolution was employed in ArcGIS Pro 3.3.0 to delineate watershed boundaries and derive various attributes, including linear, aerial, and relief aspects. Key parameters such as bifurcation ratio, drainage density, stream frequency, drainage texture, form factor, elongation ratio, and relief ratio were computed. Sub-watersheds within the Krishnai Basin were ranked using compound parameter analysis to assess and prioritize them based on erosion susceptibility.
The Krishnai River Basin has a highly branched drainage pattern with a bifurcation ratio (Rb) of 4.78, indicating that each stream order typically bifurcates into 4.78 smaller streams. The drainage density (Dd) of 1.186 km/km² highlights an efficient drainage network, while the lower drainage frequency (Df) of 0.834 streams/km² suggests fewer streams with larger intervening land areas. The coarse drainage texture (T) of 1.587 km⁻¹, along with a form factor (Rf) of 0.291, a shape factor of 3.453, and an elongation ratio (Re) of 0.608, confirms the basin's elongated shape, further supported by a circularity ratio (Rc) of 0.279 and a compactness coefficient (Cc) of 0.077. Sub-watersheds were ranked based on erosion susceptibility, with lower Cp values indicating higher risk. SW4, with a Cp of 2.5, is highly susceptible to erosion, while SW1 and SW3, with Cp values of 3.4 and 3.3, show minimal risk. SW2 and SW5 have moderate erosion potential, with Cp values of 2.8 and 2.9, respectively.
The Krishnai River, a tributary of the Brahmaputra River, India, is prone to frequent flooding. T... more The Krishnai River, a tributary of the Brahmaputra River, India, is prone to frequent flooding. The Krishnai River Basin, which has an area of 932.03 sq. km, is located between 26°4' N & 25°34' N and 90°20' E & 90°45' E, spanning four Indian districts: Goalpara (6.33%) in Assam and East Garo Hills (45.05%), West Garo Hills (7.61%), and North Garo Hills (40.99%) in Meghalaya. Existing literature on the Krishnai River Basin lacks detailed sub-watershed ranking based on compound parameters, which can be crucial for targeted watershed management and conservation efforts. Additionally, there is a need for more research that explicitly links morphometric parameters with practical watershed management strategies, providing actionable insights for policymakers and stakeholders. The study focuses on the entire Krishnai River Basin up to the confluence of the Krishnai and Dudhnai rivers before it joins the Brahmaputra River.
This study utilized Geographic Information System (GIS) and Remote Sensing (RS) techniques to extract and analyze morphometric parameters. Cartosat-1: DEM-Version-3R1 with a 32 m resolution was employed in ArcGIS Pro 3.3.0 to delineate watershed boundaries and derive various attributes, including linear, aerial, and relief aspects. Key parameters such as bifurcation ratio, drainage density, stream frequency, drainage texture, form factor, elongation ratio, and relief ratio were computed. Sub-watersheds within the Krishnai Basin were ranked using compound parameter analysis to assess and prioritize them based on erosion susceptibility.
The Krishnai River Basin has a highly branched drainage pattern with a bifurcation ratio (Rb) of 4.78, indicating that each stream order typically bifurcates into 4.78 smaller streams. The drainage density (Dd) of 1.186 km/km² highlights an efficient drainage network, while the lower drainage frequency (Df) of 0.834 streams/km² suggests fewer streams with larger intervening land areas. The coarse drainage texture (T) of 1.587 km⁻¹, along with a form factor (Rf) of 0.291, a shape factor of 3.453, and an elongation ratio (Re) of 0.608, confirms the basin's elongated shape, further supported by a circularity ratio (Rc) of 0.279 and a compactness coefficient (Cc) of 0.077. Sub-watersheds were ranked based on erosion susceptibility, with lower Cp values indicating higher risk. SW4, with a Cp of 2.5, is highly susceptible to erosion, while SW1 and SW3, with Cp values of 3.4 and 3.3, show minimal risk. SW2 and SW5 have moderate erosion potential, with Cp values of 2.8 and 2.9, respectively.
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Papers by Samarjyoti Ray
This study utilized Geographic Information System (GIS) and Remote Sensing (RS) techniques to extract and analyze morphometric parameters. Cartosat-1: DEM-Version-3R1 with a 32 m resolution was employed in ArcGIS Pro 3.3.0 to delineate watershed boundaries and derive various attributes, including linear, aerial, and relief aspects. Key parameters such as bifurcation ratio, drainage density, stream frequency, drainage texture, form factor, elongation ratio, and relief ratio were computed. Sub-watersheds within the Krishnai Basin were ranked using compound parameter analysis to assess and prioritize them based on erosion susceptibility.
The Krishnai River Basin has a highly branched drainage pattern with a bifurcation ratio (Rb) of 4.78, indicating that each stream order typically bifurcates into 4.78 smaller streams. The drainage density (Dd) of 1.186 km/km² highlights an efficient drainage network, while the lower drainage frequency (Df) of 0.834 streams/km² suggests fewer streams with larger intervening land areas. The coarse drainage texture (T) of 1.587 km⁻¹, along with a form factor (Rf) of 0.291, a shape factor of 3.453, and an elongation ratio (Re) of 0.608, confirms the basin's elongated shape, further supported by a circularity ratio (Rc) of 0.279 and a compactness coefficient (Cc) of 0.077. Sub-watersheds were ranked based on erosion susceptibility, with lower Cp values indicating higher risk. SW4, with a Cp of 2.5, is highly susceptible to erosion, while SW1 and SW3, with Cp values of 3.4 and 3.3, show minimal risk. SW2 and SW5 have moderate erosion potential, with Cp values of 2.8 and 2.9, respectively.
This study utilized Geographic Information System (GIS) and Remote Sensing (RS) techniques to extract and analyze morphometric parameters. Cartosat-1: DEM-Version-3R1 with a 32 m resolution was employed in ArcGIS Pro 3.3.0 to delineate watershed boundaries and derive various attributes, including linear, aerial, and relief aspects. Key parameters such as bifurcation ratio, drainage density, stream frequency, drainage texture, form factor, elongation ratio, and relief ratio were computed. Sub-watersheds within the Krishnai Basin were ranked using compound parameter analysis to assess and prioritize them based on erosion susceptibility.
The Krishnai River Basin has a highly branched drainage pattern with a bifurcation ratio (Rb) of 4.78, indicating that each stream order typically bifurcates into 4.78 smaller streams. The drainage density (Dd) of 1.186 km/km² highlights an efficient drainage network, while the lower drainage frequency (Df) of 0.834 streams/km² suggests fewer streams with larger intervening land areas. The coarse drainage texture (T) of 1.587 km⁻¹, along with a form factor (Rf) of 0.291, a shape factor of 3.453, and an elongation ratio (Re) of 0.608, confirms the basin's elongated shape, further supported by a circularity ratio (Rc) of 0.279 and a compactness coefficient (Cc) of 0.077. Sub-watersheds were ranked based on erosion susceptibility, with lower Cp values indicating higher risk. SW4, with a Cp of 2.5, is highly susceptible to erosion, while SW1 and SW3, with Cp values of 3.4 and 3.3, show minimal risk. SW2 and SW5 have moderate erosion potential, with Cp values of 2.8 and 2.9, respectively.