Hydrogeochemical evaluation of groundwater quality and seasonal variation in East Bokaro coalfield region,Jharkhand     

Mukesh Kumar Mahato  Prasoon Kumar Singh  Ashwani Kumar Tiwari 《Journal of the Geological Society of India》2016,88(2):173-184

Groundwater samples collected from the East Bokaro coalfield of Jharkhand state, India during the dry and rainy seasons of the year 2012. Samples were analyzed for the assessment of groundwater quality in the study area. The results of the chemical analysis indicate that the pH values were found alkaline in nature during both the season. The major cations in groundwater was in the order of Na⁺>Ca²⁺>Mg²⁺>K⁺ during the dry season while Ca²⁺>Na⁺>Mg²⁺>K⁺ during the rainy season. The abundance of the major anions was of HCO₃^->SO₄^2->Cl^->NO₃^->F^- did not change on the seasonal basis. The average NO₃^-concentration was exceeded the desirable limit for drinking water as per Indian standard in the rainy season. Silicate weathering was inferred to be a dominant process, controlling the groundwater chemistry in both seasons, with lesser contributions by carbonate weathering and ion exchange. Leaching of salts from the unsaturated zone also has a major impact on groundwater quality during the rainy season. The water quality data indicate that groundwater is generally suitable for irrigation. However, higher salinity and residual sodium carbonate values at some sites may limit groundwater use and therefore an adequate drainage and water management plan for the study area is required.  相似文献   

Bridging the gap or broadening the problem?     

Harinarayan Tiwari  Subash Pd. Rai  Kumari Shivangi 《Natural Hazards》2016,80(1):351-365

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Post failure behaviour of a rock mass under the influence of triaxial and true triaxial confinement     

Rajendra P. Tiwari  K. Seshagiri Rao   《Engineering Geology》2006,84(3-4):112-129

In this paper results of triaxial and true triaxial testing conducted on physical models of a rock mass are used to describe its post failure behaviour. The specimens comprised of three continuous joint sets and were prepared from blocks of sand lime model material. The testing was performed using a True Triaxial System (TTS) developed by the authors. The results show strain hardening, strain softening and plastic behaviour in the simulated rock mass specimens depending upon joint geometry and stress state. Expressions are suggested to estimate post peak modulus in triaxial and true triaxial stress conditions. Finally, a zonation table is proposed to assess the strain hardening, softening and plasticity behaviour of a rock mass material with the help of joint geometry and confining stress conditions at site.  相似文献   

Prioritization of watersheds using morphometric parameters and assessment of surface water potential using remote sensing   总被引：3，自引：0，他引：3  

M. Suresh  S. Sudhakar  K. N. Tiwari  V. M. Chowdary 《Journal of the Indian Society of Remote Sensing》2004,32(3):249-259

In the present study, prioritization of sub-watersheds was carried out on the basis of sediment production rate. Further, basic hydrologic information such as peak rate of runoff and annual surface water potential were also assessed for the study watersheds and these are essential requisites for effective watershed management. The 10 sub watersheds of Tarai development project area are selected for the present study. Morphometric parameters pertaining to study area are used in the estimation of sediment production rate. The sediment production rate in the study area varies between 2.45 to 11.0 ha-m/100 km²/year. The remote sensing data has been utilized for generating land use/land cover data which is an essential prerequisite for land and water resource planning and development. The remote sensing data can especially play significant role in collection of real time information from remote areas of river basins for generation of parameters required for hydrologic modeling.  相似文献   

Lineament identification for groundwater drilling in a hard-rock terrain of Sirohi district,western Rajasthan     

O N Tiwari 《Journal of the Indian Society of Remote Sensing》1993,21(1):13-19

In hard-rock terrain under semi-arid climatic zone of western Rajasthan, prospective groundwater zones are poorly defined. The area of Sirohi district studied is regarded as a critical zone for tubewell siting. The present study involves delineation of lineaments on spaceborne and airborne data and their identification in field. Lineaments are identified with surface and subsurface geological features for selection of drilling sites. The study has resulted in 100 percent high-yielding exploratory wells in the area. Identical results obtained in their respective observation wells reaffirm utility of the approach adopted.  相似文献   

Evidence for Nonlinear Coupling of Solar and ENSO Signals in Indian Temperatures During the Past Century     

R. K. Tiwari  Rekapalli Rajesh  B. Padmavathi 《Pure and Applied Geophysics》2015,172(2):531-543

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Interannual Variability of Snow Water Equivalent (SWE) over Western Himalayas     

Sarita Tiwari  Sarat C. Kar  R. Bhatla 《Pure and Applied Geophysics》2016,173(4):1317-1335

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Evidence of Higher-Order Solar Periodicities in China Temperature Record     

R. K. Tiwari  R. Rajesh  B. Padmavathi 《Pure and Applied Geophysics》2016,173(7):2511-2520

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International Conference on Natural Resources,Environment and Health (ICNREH-2017)     

Rabindra Nath Tiwari 《Journal of the Geological Society of India》2017,90(4):504-505

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Analysis of curved tunnels in soil subjected to internal blast loading     

Tiwari  Rohit  Chakraborty  Tanusree  Matsagar  Vasant 《Acta Geotechnica》2020,15(2):509-528

Acta Geotechnica - The present study deals with three-dimensional nonlinear finite element (FE) analyses of tunnels with curved alignment in the longitudinal direction, subjected to internal blast...  相似文献