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Observation of free oscillations after the 2010 Chile and 2011 Japan earthquakes by superconducting gravimeter in Kutch,gujarat,India

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Geodesy and Geodynamics 2023年第1期14卷 52-64页

作者： Chandra Sekhar Pedapudi Madhusudhana Rao Katlamudi Severine Rosat Institute of Seismological Research GandhinagarGujaratIndia Department of Earth Sciences Gujarat UniversityAhmedabadGujaratIndia Institut Terre et Environnement de Strasbourg CNRS UMR 7063StrasbourgFrance

In this paper,we present observations of free oscillations of the Earth after major earthquakes in Chile(February 27,2010,Mw8.8)and Japan(March 11,2011,Mw9.1)using data from the dual-sphere superconducting gravimeter(SG-055),installed at Badargadh(23°0.47 N,70°0.62 E),Kutch,gujarat,India in March *** see the noise characteristics,we calculated the power spectral density of the gravity time series of 5 quiet days in the frequency band 0.05-20 mHz using the new low noise model(NLNM)as a *** compared the noise level of the Badargadh site to other SG sites around the *** shows that the Badargadh SG is in a low noise *** find that the noise increases at frequencies below 1 *** a characteristic is also observed in Djougou(Afrique,Benin)and Strasbourg(France).Using theoretical tides for gujarat,we estimated a scale factor of about-814 nm/s~2/V for Gravl(lowersphere)and about-775 nm/s~2/V for Grav2(upper-sphere).We corrected the influence of atmospheric pressure from the one-second gravity data before switching to the frequency *** extracted a total of 53 Earth’s Free Oscillations(EFO)modes during the earthquake in Japan and about 47 EFO modes during the earthquake in *** are able to extract the lowest0S2spheroidal mode(0.30945 mHz or54 min)and0S0radial mode(0.81439 mHz or 20 min).The longer time series shows individual0S2singlets and0S3(0.46855 mHz)singlets due to the Coriolis splitting *** cross-referenced the frequencies of these modes using the PREM model and previous global *** correlation coefficient between the observed and the PREM model for these two events are 0.999 for Japan earthquake and 0.993 for Chile *** validates the quality of the data useful for low-frequency studies in *** also calculated the relative deviations of our observed fundamental modes with previously determined observed and theoretical *** found that the relative deviations of our observed free oscillations

关键词： Superconducting gravity data Free oscillations PREM model

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Geochemical analysis and quality assessment of geothermal water in gujarat,India

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能源地球科学(英文) 2023年第1期4卷 59-73页

作者： Vaishnavi Pandey Bhavy Chotaliya Namrata Bist Kriti Yadav Anirbid Sircar Pandit Deendayal Energy University GandhinagarGujaratIndia

Geothermal water can have a wide range of direct applications,including drinking,domestic use,irrigation and industrial *** study analyses geothermal water from Dholera,Diu,Gandhar,Kutch,Porbandar,Tulsishyam,and Unai regions located in gujarat,India,to determine the hydrochemistry for establishing the water's suitability for drinking and irrigation *** each region,three different water samples were *** drinking purpose,total eleven water quality parameters such as pH,electrical conductivity,total dissolved solids,calcium,magnesium,sodium,potassium,chloride,sulphate,carbonate and bicarbonate were *** and Durov plots were used to understand the ionic composition and evolution of *** for irrigation,the parameters such as total dissolved solids,sodium absorption ration,electrical conductivity,and potential salinity were used for water quality *** Plot was plotted to understand the sodium and salinity hazard of *** quality index and irrigation water quality index were used to assess the water quality for making the analytical procedure *** findings indicate that the water samples from the Dholera and Diu areas had extremely high values for both the water quality index and total dissolved solids *** in these places may be appropriate for making *** the other samples show adequacy for utilization in irrigation purpose.

关键词： Geochemistry Water quality index Irrigation water quality index Geothermal Quality monitoring

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Local perceptions of grassland change and priorities for conservation of natural resources of Banni, gujarat, India

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Frontiers in Biology 2009年第4期4卷 549-556页

作者： P.N.JOSHI V.KUMAR M.KOLADIYA Y.S.PATEL T.KARTHIK gujarat Institute of Desert Ecology Gujarat 370001 India

This study was conducted in the Banni region of the gujarat State,India,which is located in the western-most end of the *** main objective was to investigate the local perceptions of grassland change,regeneration potentiality,socio-economic status and fac-tors that cause degradation of the vegetation resources in *** Rural Appraisal(PRA)was employed to generate the socio-economic profile of interviewed villages or *** on vegetation deteriora-tion and changes in species composition significant for sustainable management of grassland was obtained through interviews with 51 elderly maldharies(pastoral-ists)and local inhabitants living in 31 villages in *** people had observed a change in the local surrounding habitats from grassland to woodland(domi-nated by Prosopis juliflora,locally called Gando Bavar)during their lifetime and considered it primarily a result of frequent intensive drought,constructed dams on flooding rivers in Banni,and declining *** socio-economic survey showed that the Banni communities are highly dependent on the natural grassland for various *** particular,nine woody species were useful for construction of the traditional house called Bhunga,four for medicine and 22 for livestock *** preferred and declining species were characteristically large wild thorny trees with edible fruits,*** nilotica ***(Bavar),Prosopis cineraria(Kandho),and Salvadora persica(Kharijar).Some of the locally highly preferred grass species were also considered to be declining in the local environs;they included Dichanthium annulatum(Jinjvo),Cenchrus ciliaris(Dhaman),Sporobolus fertilis(Khevai)and Chloris barbata(Siyarpuchha).The study furthermore identified a close coincidence between the interest in conserving tree species diversity nearby the natural water resources and priorities of local inhabitants,which included protection of plenty of large trees(including many fruit tress,viz.

关键词： India Kachchh pastoralist grassland arid areas conservation natural resource overgrazing

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Tectonic and climatic controls on late Quaternary bajada sedimentation along Narmada-Son Fault(NSF),gujarat,Western India

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International Journal of Sediment Research 2013年第1期28卷 66-76页

作者： Parul N.JOSHI D.M.MAURYA L.S.CHAMYAL Department of Geology The M.S.University of BarodaVadodara-390002GujaratIndia Department of Geology Faculty of ScienceThe Maharaja Sayajirao University of BarodaVadoadra-390002GujaratIndia

An alluvial bajada has been recognized along a part of the active Narmada-Son Fault(NSF) and confined by the Karjan River on the eastern side and by the Madhumati River on western *** bajada sequence exposed along the incised cliffs of various north flowing parallel streams has been studied in their proximal,medial and distal part. The sediments are characterized on the basis of grain size,fabric,sedimentary structures,bed geometry and sorting, and lithologs prepared from the mapped cliff *** study of sedimentary characteristics,lithofacies analysis and facies associations indicate that sediments are mainly of three types-sediments that were deposited by debris flows and sediment gravity flows,and as extensive bar *** major aggredational sequences are *** sequence is composed of coarsening-upward sequence of proximal facies overlain by fining-upward sequence of distal *** upward sequence record periods of tectonic activity related to uplift along the NSF and fan progradation,whereas fining-upward sequence results from tectonic quiescence *** presence of rhizocretions,calcium carbonate nodules and calcite sheets within the basal debris flow and sediment gravity flow indicate semi-arid climate,whereas the formation of pedoginized paleosol indicate relatively wetter climate prevailing in the study *** activity along the NSF has played dominant role by controlling the geometry and volume of bajada *** is found to be responsible for compositional and temporal distribution of bajada *** dating suggests that the bajada sediments were deposited during the later part of late *** incision of the sediments is attributed to uplift due to inversion of the lower Narmada basin during the early Holocene.

关键词： Bajada Alluvial fan Sedimentary facies Late Quaternary Tectonics Climate Narmada-Son Fault(NSF) Western India

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Feeding patterns of Indian giant flying squirrel(Petaurista philippensis, Elliot 1839) with reference to seasonal variation in central gujarat, India

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Journal of Forestry Research 2019年第5期30卷 1959-1965页

作者： Singh Nisha Dharaiya Nishith Wildlife and Conservation Biology Lab Department of Life Sciences Hemchandracharya North Gujarat University

Indian Giant Flying Squirrel(Petaurista philippensis Elliot 1839)is widely distributed in South Asia and the only species of flying squirrel found in *** studied the seasonal variation in its feeding behaviour at selected sites of Central *** sampling was employed to study the behaviours and mainly feeding *** analyses were consistent with other studies and indicated Madhuca longifolia as an important food *** diet of the species mainly consisted of pith,twig,seed,bark,petiole,young to mature leaves,flower and fruits of 20 species of plants of 15 families along with lichens,Vanda tessellata and Dendrophthoe *** longifolia(25%)contributed most to the squirrel diet,followed by Diospyros melanoxylon(10%)and Terminalia tomentosa(9%).Among the plant parts consumed,pith formed the highest bulk as a food at 23%,followed by fruits(21%),bark(16%),twig(14%),flower(10%),seed(6%),leaf(6%),and bud(4%).The findings reveal the high dependency of flying squirrel on certain tree *** tree species are well represented and distributed throughout central gujarat,indicating that this area is important for the survival of this species and that the area should be conserved for protection and future management of this species.

关键词： Arboreal rodent Behaviour Madhuca longifolia Phenology Western India

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Benthic Macrofaunal Assemblage in the Arid Zone Mangroves of Gulf of Kachchh-gujarat

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Journal of Ocean University of China 2007年第3期6卷 303-309页

作者： A. Saravanakumar J. Sesh Serebiah G. A. Thivakaran M. Rajkumar CAS in Marine Biology Annamalai UniversityParangipettaiIndia gujarat Institute of Desert Ecology BhujGujaratIndia

The total benthic macrofauna consisting of 62 species in 5 groups,viz. crustaceans(18),gastropods(17),bivalves(16),polychaetes(9) and fishes(2),was recorded in western Kachchh mangroves near gujarat. The population densities of benthic macro-fauna ranged from 424 to 2393 ind.m-2,the diversity ranged from 1.84 to 2.45 bits ind.-1,the richness varied between 0.82 and 0.98,and the evenness varied between 0.64 and 0.81. Two maximum diversity values were recorded during winter and summer. The salin-ity ranged from 34 to 44,temperature varied between 17 and 37 ℃,and the acidity ranged from 7 to 8.9.

关键词：广动物区系红树林干旱海湾

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Feedforward Neural Network for joint inversion of geophysical data to identify geothermal sweet spots in Gandhar,gujarat,India

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Energy Geoscience 2021年第3期2卷 189-200页

作者： Apurwa Yadav Kriti Yadav Anirbid Sircar Silver Oak College of Engineering and Technology S.G.RoadGujaratIndia Centre of Excellence for Geothermal Energy Pandit Deendayal Petroleum UniversityRaisanGandhinagar382007GujaratIndia DG GERMI and HeadCentre of Excellence for Geothermal EnergyPandit Deendayal Petroleum UniversityRaisanGandhinagar382007GujaratIndia

Artificial Neural Networks(ANNs)are used in numerous engineering and scientific disciplines as an automated approach to resolve a number of ***,to build an artificial neural network that is prudent enough to rely on,vast quantities of relevant data have to be *** this study,we analysed the scope of artificial neural networks in geothermal reservoir *** particular,we attempted to solve joint inversion problem through Feedforward Neural Network(FNN)*** order to identify geothermal sweet spots in the subsurface,an extensive geophysical studies were conducted in Gandhar area of gujarat,*** data were acquired along six profile lines for gravity,magnetics and *** low velocity zone was identified using refraction seismic technique in order to set a common datum level for other potential *** depth of low velocity zone in Gandhar was identified at 11 *** FNN backpropagation method was applied to gain the global minima of the data space and model space as *** input dataset fed to the inversion algorithm in the form of gravity,magnetic susceptibility and resistivity helped to predict the suitable model after network training in multiple *** joint inversion of data is conducive to understanding the subsurface geological and lithological features along with probable geothermal sweet *** results of this study show the geothermal sweet spots at depth ranging from 200 m to 300 *** results from our study can be used for targeted zones for geothermal water exploitation.

关键词： Artificial neural network(ANN) Geotherm Feedforward neural network(FNN) Geophysics Machine learning(ML)

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Optimization in Site Selection of Wind Turbine for Energy Using Fuzzy Logic System and GIS—A Case Study for gujarat

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Open Journal of Optimization 2013年第4期2卷 116-122页

作者： Kunal Kumar Borah Souvnik Roy T. Harinarayana gujarat Energy Research and Management Institute (GERMI) Gujarat India gujarat Energy Research and Management Institute (GERMI) Gujarat India Centre for Environmental Planning and Technology (CEPT) Gujarat India

The development of new wind energy project requires studying of many parameters to achieve maximum benefits at the cost of minimum environmental impacts. Using Geographic Information System (GIS), an analytical framework has been developed in this paper with fuzzy logic to evaluate the suitable site for turbines for optimum energy output. The criteria for suitable site for energy optimization are environmental, physical and human factors. The present study helps to assess the appropriate sites for the wind turbines in gujarat. The result obtained from the study conveys the suitability of the development of wind turbines along the western parts of gujarat. The suggested model could be used for the future site selection of the wind turbine which in turn could be of orientation for energy planners and decision makers.

关键词： Optimization Wind Turbine Placement Geographic Information System Fuzzy Logic Fuzzy Sets Pareto Surface Multi-Criteria Decision Making

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Development of Geotourism in Kutch Region, gujarat, India: An Innovative Approach

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Journal of Environmental Protection 2013年第12期4卷 1360-1372页

作者： K. Swarna S. K. Biswas T. Harinarayana 1gujarat Energy and Research Management Institute Gujarat India 2Department of Civil Engineering Indian Institute of Technol- ogy Kanpur Kanpur India Earlier at KDMIPE Dehradun India gujarat Energy and Research Management Institute Gujarat India

Geotourism in Kutch has an exemplary potential of being designated as a site for perfect establishment of a National Geopark. The paper is aimed to describe the geological significance of the sites with basic concept of creation of geoparks and promote geotourism. The financial, infrastructural aspects, deliverables to the society are presented primarily focusing on the local economic and sustainable development of Kutch. The need for development of infrastructure for geotourism is urgently required as the rare geological heritage of Kutch region is eroding and being destroyed due to manmade activities.

关键词： Geotourism Kutch Geopark Sustainable

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Mangrove Restoration and Regeneration Monitoring in Gulf of Kachchh, gujarat State, India, Using Remote Sensing and Geo-Informatics

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International Journal of Geosciences 2015年第4期6卷 299-310页

作者： Ravi Upadhyay Nischal Joshi Atul Chandrakant Sampat Arun Kumar Verma Ajay Patel Vijay Singh Jaydipsinh Kathota Manik H. Kalubarme gujarat Ecological Commission (GEC) Forest and Environment Department Government of Gujarat Gandhinagar India Bhaskarcharya Institute for Space Applications and Geo-Informatics (BISAG) Department of Science & Technology Government of Gujarat Gandhinagar India

Indian coast harbors richly diverse and critical coastal habitats like coral reefs and mangroves. Mangroves form one of the most important ecosystems of coastal and marine areas. It safeguards the ecology of the coastal areas and provides livelihood opportunities to the fishermen and pastoral families living in these areas. In real sense, mangrove is the Kalpvriksh (divine tree which fulfills all the desires) for the coastal communities. The restoration and plantation of mangroves have received a lot of attentions worldwide. To assess the impact of mangrove plantation activities and to monitor the mangrove regeneration and restoration in various villages, a joint study under the Integrated Coastal Zone Management Project (ICZMP) was taken up by gujarat Ecology Commission (GEC) and Bhaskaracharya Institute for Space Applications and Geo-Informatics (BISAG) in the Gulf of Kachchh, gujarat State.?The major objective of this study was to monitor the increase in mangrove cover in coastal areas of Gulf of Kachchh using the Indian Remote Sensing Satellite data of 2005, 2011 and 2014. The mangrove regeneration was monitored using multi-temporal Indian Remote Sensing Satellite (IRS) LISS-III and LISS-IV digital data covering Gulf of Kachchh region. The multi-temporal IRS LISS-III data covering Gulf of Kachchh of October-2005, November-2011 and LISS-IV data of April-2014 was analyzed. The mangrove density and mangrove area in different talukas was estimated based on the analysis of IRS LISS-III digital data. The mangroves have been delineated based on the pink colour observed on satellite images and the area was estimated in the Geographic Information System (GIS) environment. The taluka or block-level mangrove areas were estimated and changes in the areas were monitored during the period of six years from 2005 to 2011. It was observed that the areas where mangrove regeneration activities were carried out with active participation of Community Based Organizations (CBOs), mang

关键词： Remote Sensing Geo-Informatics Mangrove Ecosystem Change Monitoring Indian Remote Sensing Satellite Mangrove Regeneration Community Based Organizations (CBOs)

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