Study on Surface Soil Erosion of Bhogdoi River Basin Using GIS and Remote Sensing

The land is a delineable area of the earth's surface, encompassing all attributes of the biosphere immediately above or below this surface. Physical characteristics of the land determine agricultural land use. Among them, relief and slope play an important role. Aim of this study is to establish the relationship of relief and slope with agricultural land use in Valapattanam River basin in Kannur district using GIS and Remote sensing. The Survey of India Topographic maps in 1:50000 scale was used as a base map for delineating the basin. Contours were digitized and Digital Elevation Model (DEM) was generated. Agricultural land use map was prepared using satellite digital data by the digital image processing method using ERDAS IMAGINE image processing software. Agricultural land use map was intersected with the relief and slope classes in ArcGIS software. Areas were calculated and the trend of agricultural land use patterns was studied. The study revealed that there is a strong correlation between Agricultural land use and relief and slope in the Valapattanam River basin. Most of the area under paddy, coconut, mixed crops like banana and tapioca concentrated below 20 m height in the coastal plain and valley regions of the basin. Rubber mostly cultivated between 100 and 300 meters with slopes between 3 to 12 degrees. Agriculture is limited up to 18-degree slope and 300 m height. Areas of more than 300 m height are occupied mostly by forest.

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Application of GIS and remote sensing to build up a map of environmental geological suitability for residential buildings on Thi Vai river basin

Science & Technology Development Journal - Science of The Earth & Environment ◽

10.32508/stdjsee.v3i1.485 ◽

2019 ◽

Vol 3 (1) ◽

pp. 1-11

Author(s):

Tuong Van Ngo Thi ◽

Hoang Anh Nguyen

Keyword(s):

Remote Sensing ◽

River Basin ◽

Residential Buildings ◽

Satellite Image ◽

Landsat 8 ◽

Environmental Capacity ◽

Remotely Sensed Data ◽

Construction Sites ◽

Gis And Remote Sensing ◽

Suitability Maps

Geological environment zonation is to divide the areas into relatively homogeneous units based on their natural factors such as hydrology, topography, geology, disasters... to create geoenvironmental units which suit a specific type of exploitation for the purpose of research or regional management. This study presents a process of integrating GIS and remotely sensed data to develop a map of environmental geological zonning for the planning of development of the efective and safety construction sites. Data used in this work include Landsat 8 satellite image classified by application of Fuzzy Logic method to build the map of land use status which includes construction sites, and the GIS data including geology, topography, engineering geology and hydrogeology. The result from this process of integration is the suitability maps of appropriate units for the development of construction sites on the Thi Vai river basin. This map shows 3 different levels of geological environmental condition for development of the construction sites. This result demonstrates the efficiency of the integration of GIS and remote sensing to build tools to assist for the environmental capacity management, for data analysis, and beyond, to identify and incorporate the influencing factors to the subjects of management or research.

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Estimation of Morphometric Parameters of Karatoya sub-River Basin in Bangladesh using GIS and Remote Sensing Techniques

Grassroots Journal of Natural Resources ◽

10.33002/nr2581.6853.03036 ◽

2020 ◽

Vol 3 (3) ◽

pp. 73-89

Author(s):

Muhammad Jasim Uddin ◽

Md. Abu Hamjalal Babu ◽

Md. Risadul Islam ◽

Fahim Farzana ◽

Most. Lata Khatun ◽

...

Keyword(s):

Remote Sensing ◽

River Basin ◽

Morphometric Analysis ◽

Secondary Data ◽

River Network ◽

Morphometric Parameters ◽

Drainage Pattern ◽

Gis And Remote Sensing ◽

Fine Grain ◽

Drainage Texture

Morphometric analysis identifies the relationship of various aspects in the basin area, and plays an important role for understanding the geo-hydrological characteristics of a basin. The Karatoya River is ecologically and economically significant for Dinajpur region of Bangladesh. In this study, the morphometry of a sub-portion of Karatoya River in Birganj upazila was assessed by using GIS and remote sensing. The secondary data from ASTER DEM data and DEM data of Bangladesh were used to represent the morphologic and geo-hydrologic nature of the basin. The study computed and assessed more than 31 morphometric parameters in all aspects of the river basin. Morphometric analysis of the river network and the basin revealed that the Karatoya sub-basin was in the 6th order river network (as Strahler’s classification) with a dendritic and parallel drainage pattern and fine grain in drainage texture. This type of analysis will lead to develop the sustainable framework for agricultural and watershed management to be used by the local administration.

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