scholarly journals Morphometric analysis of Rasyan valley basin - A case study in the Republic of Yemen, using Remote Sensing and GIS techniques

MAUSAM ◽  
2021 ◽  
Vol 59 (2) ◽  
pp. 185-194
Author(s):  
MOHAMMED MANSOOR AL MULIKI ◽  
H. T. BASAVARAJAPPA
Keyword(s):  
Remote Sensing ◽  
Morphometric Analysis ◽  
Drainage Density ◽  
Remote Sensing And Gis ◽  
Bifurcation Ratio ◽  
Rock Types ◽  
Length Width ◽  
The Republic ◽  
Point Line ◽  
Internal And External Factors

Remote Sensing and GIS has given more importance for investigation of the geomorphological features based on the morphometric analysis duo to the diversity of data information by using digital map characters which help in moderating of data base information to get a different data like distance, area, point, line, polygon and qualitative data. This has decreased the errors which resulted by manual map sources. The main aim of this paper is the study of a morphometric analysis and characteristics of river basin area, basin shape, length, width and the ratio of length to the width, the ratio of rotation and circularity of the basin. It is also a study of relief characteristic, like slope and basin texture hypsometric curve. And also a study of drainage network characteristic like streams, stream order, length, drainage density, turn ratio, bifurcation ratio, weighted bifurcation ratio, type of drainage, and the relationship between all variables that mentioned above  with rock types and structural movements of internal and external  factors which  are represented by relief,  climate, soil, type of vegetation along with the human impact on the other hand. Results have been discussed for Rasyan valley basin in the Republic of Yemen using Landsat data.

scholarly journals Morphometric analysis of a drainage basin using geographical information system in Gilgel Abay watershed, Lake Tana Basin, upper Blue Nile Basin, Ethiopia

2021 ◽  
Vol 11 (7) ◽  
Author(s):  
Alemsha Bogale
Keyword(s):  
Remote Sensing ◽  
Morphometric Analysis ◽  
Drainage Basin ◽  
Drainage Density ◽  
Stream Order ◽  
Bifurcation Ratio ◽  
Order Stream ◽  
Lake Tana ◽  
Gis And Remote Sensing ◽  
First Order

AbstractGIS and remote sensing approach is an effective tool to determine the morphological characteristics of the basin. Gilgel Abay watershed is stretched between latitude 10.56° to 11.22° N and longitude 36.44° to 37.03° E which is one major contributing river of Lake Tana which is the source of Blue Nile. The present study addressed linear and areal morphometric aspect of the watershed. The study deals with emphasis on the evolution of morphometric parameters such as stream order, stream length, bifurcation ratio, drainage density, stream frequency, texture ratio, elongation ratio, circularity ratio, and form factor ratio. The morphometric analysis of the basin revealed that Gilgel Abay is firth-order drainage basin with total of 662 drainage network, of which 511 are first order, 111 are second order, 30 are third order, 9 are fourth order, and 1 is fifth-order stream. The total length of stream is longer for first order and decrease with increasing stream order. The mean bifurcation ratio is 5.16 which is greater than the standard range, and it indicates that basin is mountainous and susceptible to flooding. Low drainage density is observed which is 0.6 km−2. It indicates that basin is highly permeable and thick vegetation cover. Areal aspect of the morphometric analysis of the basin revealed that the basin is slightly potential to flooding and soil erosion, indicating that runoff generated from the upland area of the watershed is significantly infiltrated at the gentle downstream part and contributing to groundwater potential. Further studies with the help of GIS and remote sensing with high-resolution remote sensing data integrating with ground control data in the field are more effective to formulate appropriate type of natural resource management system.

Prioritization of Malesari mini-watersheds through morphometric analysis: a remote sensing and GIS perspective

2012 ◽  
Vol 69 (8) ◽  
pp. 2643-2656 ◽  
Author(s):  
Dhruvesh P. Patel ◽  
Chintan A. Gajjar ◽  
Prashant K. Srivastava
Keyword(s):  
Remote Sensing ◽  
Morphometric Analysis ◽  
Remote Sensing And Gis
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