Informatics Publishing Limited

S. S. Asadi ¹, C. H. Hanumantha Rao ¹, T. Lakshmi Prasad ², M. Anji Reddy ³

Affiliations
1 Dept.of Civil Engineering, School of Mechanical & Civil Sciences, KL University,Green fields,Vaddeswaram-522502,Guntur, A.P, IN
2 Dept.of Earth Sciences,yogi vamana university, Vamanapuram, kadapa, IN
3 Director Foreign Relations, Jawaharlal Nehru Technological University, Hyderabad-500072, A.P, IN

Abstract

The main objective of the study is to evaluate the physical characteristics and the natural resources in the study area and to develop methods for its efficient utilization and sustainable management using tools such as remote sensing and GIS. The thematic layers are derived from IRS-ID PAN + LISS-III merged satellite imagery and survey of India (SOI) topo maps using visual interpretation technique. These maps are converted to digital format using AutoCAD software and further integrated using Arc/Info and Arc view GIS software for the generation of final outputs. Physical characterization helps for quality of environment and natural resources development, which are optimally suitable to the terrain and to the development of water resources. The physical characterization of an area is also useful to plan the basic minimum needs of farmers, thereby improving their socio-economic conditions and helps in evolving a broad national policy which can be applied by decision makers for sustainable development of any given study area. This case study would help in developing municipalities with details at micro level for further planning.

Keywords

Remote Sensing, Geographical Information System, Sustainable Development

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K. S. N. Reddy ¹, T. Lakshmi Prasad ¹, N. Babu Rao ¹

Affiliations
1 Department of Geology, Andhra University, Visakhapatnam - 530 003, IN

Abstract

Along and across the east coast of India between Yarada and Gangavaram, sediment samples were collected from different microenvironments of the beach representing lower foreshore, middle foreshore, upper foreshore, berm, backshore and dune, at four stations(Yarada, Dibbavanipalem, Valametta and Gangavaram) in different monsoon seasons (NE and SW) for the period of two years (1997 to 1999). All the nucroenvironments except at Dibbavanipalem have not shown cyclic deposition and erosion with monsoons Out of Four-Size ranges +60 (+0 25 mm), +120 (-0 25 to +0 125 mm), +170 (-0 125 to +0 088 mm) and +230 (-0 088 to +0 063 mm), the -0 125 to +0 088 mm and -0 088 to +0 063 mm size range shows rich concentration of heavy minerals The heavy mineral content in the bulk sediment samples ranges from 0 53 - 48 56% in December, 1997 and 0 83 - 53 22% in December, 1998 Opaques, sillimamte, garnets, pyroxenes, amphiboles, zircons, monazite, rutile, biotite, tourmaline and apatite from the beach sands of Yarada-Gangavaram are reported Opaques are concentrated in fine fraction while garnets are concentrated in coarse fraction Scatter plots of heavy mineral assemblages and erosion/accretion indicates as the rate of erosion increases, heavy mineral concentration slightly increases in dune, backshore and foreshore Sub-Environments and the concentration of heavy minerals decreases with increase of erosion in berm sub-environment. The concentration of heavy minerals in nucroenvironments is not only related to erosion/accretion but also related to their densities Khondalite, chamokite and leptynite of the Eastern Ghats appear to be the major source for the above heavy mineral assemblages.

Keywords

Marine Geology, Beach Profile, Heavy Mmerals, Yarada-Gangavaram Bay, Visakhapatnam, Andhra Pradesh.

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G. Sreenivasulu ¹, N. Jayaraju ¹, B. C. Sundara Raja Reddy ², T. Lakshmi Prasad ³, B. Lakshmanna ¹, K. Nagalakshmi ³

Affiliations
1 Department of Geology, Yogi Vemana University, Kadapa 516 003, IN
2 Department of Geology, Sri Venkateswara University, Tirupati 517 502, IN
3 Department of Earth Sciences, Yogi Vemana University, Kadapa 516 003, IN

Abstract

Coastal zones are dynamic interfaces of land and water of high ecological diversity and critical economic importance. The boundaries, shape and size of this coast change constantly under the influence of both natural and anthropogenic factors. The study area, Tupilipalem is one of the proposal sites for constructing a major port, to be named Dugarajapatnam Port, along the east coast of Andhra Pradesh, India. We have used multitemporal satellite images of IRS P6 LISS-III and Landsat 8 OLI/TIRS data from 2011 to 2015 to delineate changes in Tupilipalem coast. The subsequent short-term lagoon mouth closure and the long-term coastal erosion and accretion rates have been calculated for the periods between 2011 and 2015. Low river inflow, wind, tides, the movement of the waves and littoral currents play a key role in the closure of the lagoon mouth and also for the dynamic activities of erosion and accretion. Moreover, the impact on socio-economy and ecology of the study area during the lagoon mouth closure period has been studied.

Keywords

Coastal Zone, East Coast of India, Morphodynamics, Remote Sensing and GIS, Sediment Dynamics.

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K. S. N. Reddy ¹, D. Deva Varma ¹, E. N. Dhanamjaya Rao ¹, B. Veeranarayana ¹, T. Lakshmi Prasad ²

Affiliations
1 Department of Geology, Andhra University, Visakhapatnam - 530 003, IN
2 Department of Earth Sciences, Yogi Vemana University, Kadapa - 516 001, IN

Abstract

Heavy mineral analysis was carried out for the beach and fore dune sediments along 60 transects of Nizampatnam-Lankavanidibba coastal area. The heavy mineral assemblage in this area with decreasing abundance of opaques (Ilmenite + magnetite, 47.67%), pyriboles (20.35%), garnets (3.66%), epidote (3.23%) and with less than 3.0% concentration of sillimanite, zircon, staurolite, kyanite, apatite, spinel, monazite, biotite, topaz, leucoxene and chlorite. The heavy mineral concentrations are high in the finer fractions i.e., +120 and +230 (ASTM) than the coarse fraction (+60) of sand. In the seven sectors, heavy mineral assemblage is same but their concentrations are different. The sectors nearer to the river mouth contain high concentration of high specific gravity heavy minerals (ilmenite and magnetite) than sectors away from the river mouth. The redistribution of heavy minerals is controlled by creek dynamics, longshore currents, size and specific gravity of the heavy minerals.

Keywords

Heavy Minerals, Coastal Sands, Longshore Currents, Tidal Channels.

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