Home
Issues List
1 Jul 02, 2016
SIMULATION OF WATER YIELD OF A HUMID TROPIC WATERSHED USING SWAT MODEL

Water is one of the most important natural resources sup-porting all forms of life on earth and the sustainable use and conservation of this resource has to be planned on watershed basis. Watershed is a land area which drains water received through precipitation to a common outlet, usually a small drainage channel to a river. In this study, Kurumali sub basin of Karuvannur river in Thrissur district, Kerala was selected. SWAT model is used in the study which is compatible with Arc GIS 10.2. Various inputs used by the SWAT model in-clude DEM, landuse, soil data and climatic data to predict the runoff at the catchment outlet. Then the model has been calibrated and validated using the observed river flow. Pre-diction efficiency of the calibrated model has been tested by the NSE and R2 measures. Both these measures showed very high values indicating the good predictive capability of the model. The model has been used to estimate the water bal-ance components viz., surface runoff, lateral flow, base flow and ET to take more informed decisions on water conserva-tion and management....

Authors: Sandra George, Sathian, K.K.

2 Jul 02, 2016
SPATIAL EVALUATION OF WATER QUALITY FOR IRRIGATION IN PUDUKKOTTAI DISTRICT, TAMIL NADU, INDIA

Water is most essential but scarce resource in our country, it is used wide range of purposes like domestic, irrigation, industrial, hydro electric power generation etc, At the same time the quality and the availability of the fresh water resources is the most pressing of the many environmental challenges on the national horizon. Geometric increase in population coupled with rapid urbanization, industrialization and agricultural development has resulted in high impact on quality and quantity of water. The situation warrants immediate redressal through radically improved water resource and water quality management strategies. In this context, the present study has been undertaken to analyse the geochemical parameters of the water for irrigation for the period 1973, 1993 and 2013 in Pudukkottai district of Tamilnadu using geospatial techniques and find out the spatio temporal changes in the quality using GIS analysis. In addition the village level changes are identified. It has been observed that in 1973 the area under good quality was 2187.9sq.km, in 1993 there was a decrease in an area of 873.2sq.km and in the year 2013 increased to 1919.2sq.km of area. The zonation of water quality classified the study area into good quality region having an area of 784.12 sq.km, medium qualityregion 3839.24 sq.km and poor quality region about 39.64 sq.km....

Authors: S.Sreekala, R.Neelakantan.

3 Jul 02, 2016
IDENTIFYING SITES FOR DISPOSAL OF MUNICIPAL SOLID WASTES IN COIMBATORE CITY USING GEOSPATIAL TECHNOLOGIES

Growing problems like increase in population and city expansion are results of rural migration to urban centers. It leads to increase in solid waste generation and insufficient dumpsites leading to a creation of patches of dumpsites all over the places; and an inadequate organized system of waste handling for a major part of the city. Making use of the novel tools offered by spatial modeling techniques and Geographical Information System may provide large economic and environmental savings through the reduction of travel time, distance, fuel consumption and pollutants emissions. The study in particular, focuses on site selection for dumping sites in and around Coimbatore city using remote sensing and Geographical Information System. By considering various criteria like are lithology, geomorphology, slope, drainage, land use/land cover, population, distance from major roads, distance from streams, and distance from drainage and water bodies, the study has identified the various locations for dump sites using multi criteria analysis for waste disposal in Coimbatore city....

Authors: Ramachandran, J., Balaji Kannan, R. Kumaraperumal, K.P. Ragunath.

4 Jul 02, 2016
EXPLOITING THE FRACTIONAL DISTANCE MATRIX FOR ESTIMATING THE NUMBER OF ENDMEMBERS AND EXTRACT THEM

This paper introduces a novel distance-based method, for estimating the number of endmembers and extracts them. The method adopts the network concept according to which, every pixel of the image creates a network. The endmembers and the pixel are the nodes of the network while the frac-tional distance parameter describes and quantifies it. When the pixel is replaced by an endmember, then an endmember network is created. The set of the endmember networks is mathematically formulated by the endmember fractional distance matrix. The proposed method, called Fractional Distance (FD) method, exploits the mathematical properties of the endmember fractional distance matrix and provides the number and the signatures of the endmembers with low computational cost. Fractional distance matrices satisfactori-ly reveal the linear independence of the endmember vectors, as well as, the maximization of the volume of the simplex formed by the endmembers. FD was evaluated using simu-lated and real data, and it was also compared with the exist-ing random counterparts of state of the art algorithms. Eval-uation of the method showed that the method yields robust and satisfactory results, and outperforms in relation to its competitors....

Authors: D. Sykas, V.Karathanassi.

5 Jul 02, 2016
ANALYSIS OF DIGITAL ELEVATION MODEL OF KOLLI HILL, SOUTH INDIA USING SHUTTLE RADAR TOPOGRAPHY MISSION DATA AND GIS TECHNIQUES

The present study highlights the use of DEM and its analysis on slope and aspects. SRTM data and GIS tech-niques are helpful to analyze the Elevation characteristics of hilly terrain. The SRTM data were downloaded and used for the present study. The study area covers an area of 485 Km2 in parts of Kolli hill, South India. The result of elevation variation using DEM was anlaysed and its classification is given below. Using this DEM output as input in ArcGIS to prepare the slope and aspect details of the study area is at-tempted. The slope and aspect results show that the area has steeper in slope in the western part, and most of the slopes are in the western direction. This output has immense appli-cation in proper planning and management of various natural resources and also highly useful for the natural disaster man-agement studies....

Authors: Gurugnanam.B, Kalaivanan.M, Bairavi.S.

6 Jul 02, 2016
LAND USE/COVER MAPPING OF PADERU MANDAL OF VISAKHAPATNAM DISTRICT, ANDHRAPRADESH USING GEOSPATIAL TECHNIQUES

Rapidly developing geospatial technologies like Remote Sensing (RS), Geographic Information System (GIS) and Global Positional System (GPS) offers an efficient and timely approach for mapping, because of its wide area coverage, gives information about inaccessible area, timely repetitive coverage of the same area. In this study, On- screen visual interpretation was made to classify the land use/land cover particularly for the hilly region like Paderu mandal lies in between the latitudes of 18o18' to 17o 56' and the longitudes of 82o32' to 82o53' . Where, the digital classification techniques were found to be not so effective, due to the very undulating topographical condition and complex spectral signature of vegetation. The identified land use / cover features are built-up area, dense forest, open forest, scrub forest, scrub land, plantation, agriculture and water bodies. Maximum area (35% of the total geographical area of the mandal) is covered by open forest followed by scrub forest (21.5%), agricultural land (20.2 %), dense forest (16.2%), and plantations (2.5%), while built up land covers only 2.1 % of Total Geographical Area (TGA). Further, the study has asses the temporal changes of land use of Paderu mandal in comparison to Visakhapatnam district during the periods 1991-2011, using statistical data from Directorate of Economics & Statistic (Hyderabad) and District Statistic Abstracts of Visakhapatnam....

Authors: D.Ramprasad Naik, N. Appala Raju, P. Jagadeeswara Rao, T.Chandrasekhar Rao.

Announcements

  • Vol 2, Issue 5 Sept 2012 will be published on 22 Sept 2012 Evening. Kindly wait for little more time. Posted by Admin.