Tag: Change detection

Recent Articles-IJGGS

Land use and Land cover change detection through Remote Sensing & GIS Technology: Case study of Pathankot and Dhar Kalan Tehsils, Punjab

Author(s)– Prabhbir Singh, Kamlesh Khanduri

ABSTRACT
The objective of study is to prepare land use/land cover map for different time periods, analyse the land use changes and evaluate the socio – economic implications of predicted change. Landuse changes have been detected by image processing method in EDRAS imagine9.3, ArcGIS9.3. Monitoring of landuse/landcover changes help to plan development activities such as major schemes and for community requirements. Fifteen year time period of 1991 -2006 shows some major land use changes.  During this period of fifteen years 104.02 sqkm areas has undergone positive changes into Cropped Land and Builtup areas from Forest and Fallow land.  There is a remarkable increase (69.23sq/km) in the area of Crop Land.

Read full text

Advertisements

Recent Articles-IJGGS

A study on the Land use pattern change along the coastal region of Nagapattinam, Tamil Nadu

Author(s)– Arunachalam S et.al.,

ABSTRACT
The ground water in a particular coastal aquifer is to be described, evaluated and explained primarily by application of principles of aquatic chemistry to hydrogeological systems to understand the migration of solutes using field data. The origin of salinity is not only due to seawater intrusion but there are other possible sources. There is a lot of human pressure on the coast line due to urbanization, industrialisation, aquacultural and agricultural activities. Apart from these factors, salinity increase in the coastal aquifers, sea level changes, changes in coastal configurations due to mining activities and impact of the natural calamities like floods, tsunami and earth quake also add to the magnitude of the problem. This study aims to bring out the Land use/land cover pattern of study area were studied using IRS P6 LISS III data and correlate with the water level, Electrical conductivity of ground water and rainfall variations. Two data products were selected during May 2000 and august 2009 to study the land use pattern variations. The land use/land cover patterns were visually interpreted and digitized using ERDAS IMAGINE, MapInfo and Arc GIS software. The study reveals that the agricultural area has increased by 172sq.km and settlements by 28.5 sq. km there is a decrease in water bodies and others (includes waste land).

Read full text

Recent Articles- IJGGS

Digital and Visual Analyses of IRS Satellite Data for Zonation and change deduction of coral reefs in Gulf of Mannar marine biosphere reserve

Author(s)-Thanikachalam.M

ABSTRACT
Coral reefs are highly sensitive and productive marine ecosystem. The increasing human population and their activities and other natural factors have caused the degradation of coral reefs. The IRS LISS-II (1988) and IRS LISS-III (1998) satellite data with GIS and ERDAS software were used for mapping coral reef, change detection and of coral reef zonations. Digital and visual techniques were used to map the coral reefs. Visual classification shows that 25 km2 of coral reef area in Gulf of Mannar has been lost over a period of ten years.  Digital classification of IRS LISS-III date using Principle Component Analysis was found to be more suitable for coral reef zonation.

Read full text

Recent Articles- IJGGS-Geomatics Based Assessment on Land use Changes and its Impact over the Groundwater Conditions in a newly developing sub urban area –A Case of Southern Chennai

ABSTRACT

Geomatics is today widely used in land use change detection and management of water resources. The technology has found to be very effective in identification of land use changes occurred over a period of time with temporal data. Explosive growth of urbanisation, increasing demand of water for industries and IT parks have resulted in reduction of water bodies and land use in southern sub urban area of Chennai City. Detection of land use changes brings out aquifer hazards in the study area. The present paper summarizes the aggravating groundwater problem and gives solution through geomatics by integrating drainage, geology, geomorphology, lineament, soil, water level, rainfall and land use for the periods 1994, 2004 and 2008.  By synthesizing the satellite data and hydrogeological information, changes in land use category, uprising aquifer hazards, unaccountable groundwater extraction surpassing over unplanned growth of urbanization which have trigged the hydrogeological imbalance, lowering of water level have been identified.

Read full text

 

Recent Article- IJGGS

Remote Sensing and GIS Applications on Change Detection Study in Coastal Zone Using Multi Temporal Satellite Data

Author(s) – Prabaharan.S,Srinivasa Raju.K, Lakshumanan.C,Ramalingam.M.

ABSTRACT

Coastal zones are most vulnerable for land use changes in this rapid industrialization and urbanization epoch.  It is necessary to evaluate land use – land cover changes to develop efficient management strategies.  The main Information on landuse/landcover in the form of maps and statistical data is very vital for spatial planning, management and utilization of land.  In the study, remote sensing and geographic information system (GIS) were used in order to study landuse/landcover changes.  Land use changes may influence many natural phenomena and ecological processes, including runoff, soil erosion and sedimentation and soil conditions.  The urban areas are changing due to various human activities, natural conditions and development activities.  According to the user’s requirements, updating of landuse mapping is required to various departments.  The aims of this study it has been observed that the important coastal land use types of Vedaranniyam coast (Creeks, Rivers) have been reduced drastically in their extent due to reclamation, dredging, tipping and other anthropogenic activities along the coastal zone.

Read full text