Journal of the Geological Society of India最新文献

Landslide Occurrences under Diverse Landuse/cover in Lower Kosi Watershed, Central Himalaya 喜马拉雅中部下科西流域不同土地利用/覆盖下的滑坡发生率

IF 1.3 4区地球科学

Journal of the Geological Society of India Pub Date : 2023-12-20 DOI: 10.1007/s12594-023-2525-4

Vinita Joshi, Anita Pande

{"title":"Landslide Occurrences under Diverse Landuse/cover in Lower Kosi Watershed, Central Himalaya","authors":"Vinita Joshi, Anita Pande","doi":"10.1007/s12594-023-2525-4","DOIUrl":"https://doi.org/10.1007/s12594-023-2525-4","url":null,"abstract":"Present study was related to land degradation after landslide and risk analysis of Lower Kosi watershed in Central Himalaya using RS and GIS. The study was aimed to identifying the relation of land use with landslide activity in Himalayan terrain and landslide management. The landslide inventory map was prepared for the detailed study with the help of Google Earth Image and field verifications. Landslide had been sub-categorized into two categories; natural and road induced. The land use map was prepared from Google Earth image followed by toposheets. Statistical analysis of landslide frequency and density as well as frequency and density ratios were applied. The collected data was evaluated in combination with GIS. The relationship between land use categories and landslide occurrences was determined. The landslide frequency ratio (FR) and density ratio (DR) were analyzed. The FR and DR value of 1 is an average value. Hence, the value of ratio more than 1 signifies a strong relationship between landslides and the given factor while ratio values less than 1 registers a poor relationship. The FR and DR values were >1.0 in the areas of fallow land, barren/rocky land, agricultural land and open forest revealing a strong relation to landslide processes while the lesser values of FR and DR in ‘dense forest’ area determines the impact of sufficient vegetation cover on the least occurrence of landslides. This study may be applicable for new and existing land use planning projects as the adopted methodology provides rapid estimation of landslide vulnerability of the area.","PeriodicalId":50001,"journal":{"name":"Journal of the Geological Society of India","volume":"56 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138820156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent Trends and Techniques in the Study of Brittle Deformation: Implications in Upper Crustal Fluid Flow 脆性变形研究的最新趋势和技术：上地壳流体流动的影响

IF 1.3 4区地球科学

Journal of the Geological Society of India Pub Date : 2023-12-20 DOI: 10.1007/s12594-023-2535-2

Tridib Kumar Mondal

引用次数: 0

Super High Organic Sulphur (SHOS) in Tertiary coals of North-East India 印度东北部第三纪煤炭中的超高有机硫（SHOS）

IF 1.3 4区地球科学

Journal of the Geological Society of India Pub Date : 2023-12-20 DOI: 10.1007/s12594-023-2538-z

Manabendra Nath

引用次数: 0

Indian Endeavour in Antarctic Geoscience 印度在南极地球科学方面的努力

IF 1.3 4区地球科学

Journal of the Geological Society of India Pub Date : 2023-12-20 DOI: 10.1007/s12594-023-2534-3

Rasik Ravindra

引用次数: 0

Numerical Analysis of a Tunnel Passing through Jointed Rockmass 隧道穿越节理岩体的数值分析

IF 1.3 4区地球科学

Journal of the Geological Society of India Pub Date : 2023-12-20 DOI: 10.1007/s12594-023-2524-5

Harshal Verma, Arunava Ray, Rajesh Rai, Bappaditya Manna, T. N. Singh

{"title":"Numerical Analysis of a Tunnel Passing through Jointed Rockmass","authors":"Harshal Verma, Arunava Ray, Rajesh Rai, Bappaditya Manna, T. N. Singh","doi":"10.1007/s12594-023-2524-5","DOIUrl":"https://doi.org/10.1007/s12594-023-2524-5","url":null,"abstract":"With the increase in the pace of development, the demand for tunnels has increased in recent years. Analysing the stability of a tunnel in a fractured rock mass is a very challenging and cumbersome activity. The tunnel stability depends on the strength of the rock, joints bolt strength, in-situ stresses, and their orientation. This paper focuses on constructing tunnels in fractured/jointed rock mass. Three different software namely Rocscience Phase2 (finite element based), FLAC3D (finite volume based) and PFC3D (distinct element based), were used to analyse the performance and stability under static and dynamic loading conditions. The geomaterial properties used for the analysis were taken from data obtained after laboratory testing and based on available literature. The effect of joint orientation and bolt length was analysed using Phase 2 assuming plain strain conditions. The effect of earthquake and performance of fully grouted, energy absorbing and deformation-controlled bolts under seismic loading conditions were compared using FLAC3D. While the 3D distinct element analysis of geometry was performed using PFC3D to evaluate the effect of joints and their orientation. The performance of the different types of bolts was also analysed numerically. The behaviour of bolts can be customised using the ‘fish‘function. The results indicate that analysis must incorporate the fusion of various numerical simulation techniques like finite element-, finite volume- and distinct element-based methods for more reliable results.","PeriodicalId":50001,"journal":{"name":"Journal of the Geological Society of India","volume":"5 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138819965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of 226Ra, 232Th and 40K activity from the Soil Samples of Ganderbal and Budgam Districts of Jammu and Kashmir, India 估算印度查谟和克什米尔甘德巴尔和布德加姆地区土壤样本中的 226Ra、232Th 和 40K 放射性活度

IF 1.3 4区地球科学

Journal of the Geological Society of India Pub Date : 2023-12-20 DOI: 10.1007/s12594-023-2531-6

Asiya Rahim, Savidh Khan, Asha Rani, Km Abida, Rohit Mehra, Sansar Chand

{"title":"Estimation of 226Ra, 232Th and 40K activity from the Soil Samples of Ganderbal and Budgam Districts of Jammu and Kashmir, India","authors":"Asiya Rahim, Savidh Khan, Asha Rani, Km Abida, Rohit Mehra, Sansar Chand","doi":"10.1007/s12594-023-2531-6","DOIUrl":"https://doi.org/10.1007/s12594-023-2531-6","url":null,"abstract":"The study of radionuclides is very important in our daily life as these impose health implications to the general public. In present study the estimation of radionuclides in Ganderbal and Budgam districts of Kashmir Province using NaI(Tl) gamma-ray spectrometer has been carried out. Radium, thorium, and potassium activity concentrations have been observed to range from 25±3 to 33±5 Bqkg−1, 3±2 to 11±3 Bqkg−1 and 415±63 to 601±80 Bqkg−1with average values of 29 Bqkg−1, 5 Bqkg−1 and 514 Bqkg−1, respectively. The radium equivalent activity (Raeq) for the soil samples has been evaluated and was found in the range of 107 to 128 Bqkg−1 with the mean value of 116 Bqkg−1. It has been inferred that the radium equivalent activity (Raeq) lies in the permissible limits of 370 Bqkg−1 set by United Nations Scientific Committee on the Effects of Atomic Radiation. Absorbed dose and annual effective dose (indoor and outdoor) values were found to vary from 34 to 43 nGyh−1, 0.17 to 0.21 mSv and 0.04 to 0.05 mSv, respectively. Also, hazard indices (external and internal) are calculated from the specific concentration of radium, thorium and potassium which are found less than unity as recommended by organization for economic cooperation and development (OECD). Therefore, it can be concluded that the present study area does not pose any health implication to the general public.","PeriodicalId":50001,"journal":{"name":"Journal of the Geological Society of India","volume":"35 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138819967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insights from the Five-day National Training Programme on “Earth Observation Data Analytics for Disaster Management Focusing on Flood and Drought” 为期五天的 "地球观测数据分析促进以水灾和旱灾为重点的灾害管理 "国家培训计划的启示

IF 1.3 4区地球科学

Journal of the Geological Society of India Pub Date : 2023-12-20 DOI: 10.1007/s12594-023-2539-y

Surajit Ghosh, Jayesh Mukherjee, Anuva Chowdhury, Kounik De Sarkar, A. Taron, Biplab Biswas, Ashish Ghosh

引用次数: 0

GSA Connects 2023: Annual Convention of the Geological Society of America, Pittsburgh, USA GSA Connects 2023：美国地质学会年会，美国匹兹堡

IF 1.3 4区地球科学

Journal of the Geological Society of India Pub Date : 2023-12-20 DOI: 10.1007/s12594-023-2532-5

K. V. Krishnamurthy

引用次数: 0

Conventional, Renewable Energy Sources and Climate Change Perspective for Energy Security in India 印度能源安全的常规能源、可再生能源和气候变化视角

IF 1.3 4区地球科学

Journal of the Geological Society of India Pub Date : 2023-12-20 DOI: 10.1007/s12594-023-2537-0

Pooja Tiwari, D. P. Mishra, Samaya S. Humane, M. F. Quamar, Biswajeet Thakur, S. Humane, Ayushi Mishra, Mitra Rajak

引用次数: 0

Semi-automated Rock Layer Recognition from Borehole Log Data Using Combined Wavelet and Fourier Transform: A Case Study in the KG basin, India 利用小波和傅立叶变换组合从钻孔测井数据中进行半自动岩层识别：印度 KG 盆地案例研究

IF 1.3 4区地球科学

Journal of the Geological Society of India Pub Date : 2023-12-20 DOI: 10.1007/s12594-023-2522-7

Bappa Mukherjee, Kalachand Sain

{"title":"Semi-automated Rock Layer Recognition from Borehole Log Data Using Combined Wavelet and Fourier Transform: A Case Study in the KG basin, India","authors":"Bappa Mukherjee, Kalachand Sain","doi":"10.1007/s12594-023-2522-7","DOIUrl":"https://doi.org/10.1007/s12594-023-2522-7","url":null,"abstract":"The accurate identification of rock layer interfaces from wireline logs is one of the crucial issue of geological interpretation as we face difficulties in traditional interpretations due to the presence of various kind of high and low frequencies in the log data. Determination of rock boundaries in shallow marine sediments is very important to understand several issues related to the exploration of conventional and non-conventional hydrocarbons. Presently a combined wavelet and Fourier transform-based approach was demonstrated to discriminate the rock layers from wireline log data in Krishna-Godavari basin, which were acquired during the India National Gas Hydrate Program Expedition 02 (NGHP-Exp.-02). Initially, we selected the suitable mother wavelets and optimum level of decomposition to perform the wavelet transform by computing the error between the original log signal(s) and approximation coefficients (cA’s) of the decomposed signal(s) at several decomposition levels. Subsequently, discrete wavelet transform (DWT) of a particular decomposition level was applied to the log signals to obtain the detail coefficients (cD’s), which contain the high-frequency components of the log signals. Further, these high-frequency components of the log signals were utilized in frequency spectrum-based filtering approaches. This approach was adapted to yield information about the abrupt changes occurring in the log signals across the studied depth interval. The combined application of Fourier and wavelet transforms to shallow marine log data demonstrates that this approach is an efficient tool for delineating rock layer boundaries.","PeriodicalId":50001,"journal":{"name":"Journal of the Geological Society of India","volume":"24 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138819913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0