Assessing village-level carbon balance due to greenhouse gas mitigation interventions using EX-ACT model     

Ch. Srinivasarao  Y. Sudha Rani  V. Girija Veni  K. L. Sharma  G. R. Maruthi Sankar  J. V. N. S. Prasad  Y. G. Prasad  K. L. Sahrawat 《International Journal of Environmental Science and Technology》2016,13(1):97-112

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Devaluation of female work participation with urbanization: a case of peri-urban Ahmedabad     

Sikarwar  Ankit  Chattopadhyay  Aparajita  Jaiswal  Ajit Kumar  Rani  Ritu 《GeoJournal》2022,87(1):319-331

GeoJournal - Urban expansion of the Indian metropolitan cities has reached the rural peripheries. There have been social, economic, and environmental consequences of this process of...  相似文献   

Influence of natural and anthropogenic activities on UV Index variations – a study over tropical urban region using ground based observations and satellite data     

K. V. S. Badarinath  Shailesh Kumar Kharol  V. Krishna Prasad  Anu Rani Sharma  E. U. B. Reddi  H. D. Kambezidis  D. G. Kaskaoutis 《Journal of Atmospheric Chemistry》2008,59(3):219-236

Measurements of total ozone column and solar UV radiation under different atmospheric conditions are needed to define variations of both UV and ozone and to study the impact of ozone depletion at the Earth’s surface. In this study, spectral and broadband measurements of UV-B irradiance were obtained along with total ozone observations and aerosol optical depth measurements in the tropical urban region of Hyderabad, south India. We specifically used an Ultra-Violet Multifilter Rotating Shadow band Radiometer (UVMFR-SR), to measure UV irradiance in time and space. To assess the aerosol and O₃ effects on ground-reaching UV irradiance, we used measurements from a Microtops II sun photometer in addition to the Tropospheric Ultraviolet Visible radiation (TUV) model. We also assessed the Defense Meteorological Satellite Program – Operational Line Scanner (DMSP-OLS) night time satellite data for inferring biomass burning fires during the study period. Results clearly suggested a negative correlation between the DMSP-OLS satellite derived fire count data and UVMFR-SR data suggesting that aerosols from biomass burning are directly attenuating UV irradiance in the study region. Also, correlation analysis between UV index and ozone measurements from sun photometer and TOMS-Ozone Mapping Instrument (OMI) indicated a clear decrease in ground reaching UV-B irradiance during higher ozone conditions. The higher levels are attributed to photochemical production of O₃ during the oxidation of trace gases emitted from biomass burning. Results also suggested a relatively high attenuation in UV irradiance (~6% higher) from smoke particles than dust. We also found a relatively good agreement between the modeled (TUV) and measured UV irradiance spectra for different atmospheric conditions. Our results highlight the factors affecting UV irradiance in a tropical urban environment, south India.  相似文献   

Variations in CO,O<Subscript>3</Subscript> and black carbon aerosol mass concentrations associated with planetary boundary layer (PBL) over tropical urban environment in India     

K. V. S. Badarinath  Anu Rani Sharma  Shailesh Kumar Kharol  V. Krishna Prasad 《Journal of Atmospheric Chemistry》2009,62(1):73-86

Carbon monoxide (CO), Ozone (O₃) and Black Carbon (BC) aerosol mass concentrations in relation to planetary boundary layer (PBL) height measurements were analyzed from January–December, 2008 over tropical urban environment of Hyderabad, India. DMSP-OLS night-time satellite data were analyzed for fire occurrence over the region and its correlation with pollution concentrations over the urban region. Results of the study suggested considerable increase in CO and BC concentrations during early morning hours. Higher concentration of BC, CO and ozone was observed during pre-monsoon, post-monsoon and winter and lowest concentrations exhibited during monsoon season. NCEP/NCAR reanalysis winds suggested long range transport of aerosols and trace gases from forest fires are enhancing the pollutant concentrations over the study area.  相似文献   

Stresses produced by a load moving over the rough boundary of a semi-infinite transversely isotropic solid     

Sunita Mukherjee 《Pure and Applied Geophysics》1969,72(1):45-50

Summary Stresses produced due to a moving load over the plane surface (supposed to be rough) of a semi-infinite transversely isotropic medium have been calculated in this paper.  相似文献   

Note on the propagation of waves in infinite spherically-aeolotropic medium produced by a blast in a spherical cavity     

Sunita Mukherjee 《Pure and Applied Geophysics》1968,70(1):39-46

Summary By using the Laplace transform method, solution has been obtained for the elastodynamic problem due to blast pulse on the inner surface of a spherical cavity in an infinite spherically aeolotropic elastic solid. Both types of blast producing radial and rotational waves have been considered.  相似文献   

Alterations in Certain Organic Components and Serum Electrolytes in Notopterus notopterus Chronically Exposed to Phenolic Compounds     

S. R. Verma  Saroj Rani  R. C. Dalela 《洁净——土壤、空气、水》1982,10(1):31-40

• The present investigation was undertaken to evaluate the effects of three sublethal concentrations (1/10th, 1/15th and 1/20th fractions of 96 h LC₅₀) of phenol (P), dinitrophenol (DNP), pentachlorophenol (PCP) and their antagonistic [(PCP + DNP)/P], additive [(DNP + P)/PCP] and synergistic [(P + DNP)/PCP] combinations, on several organic and inorganic components of haemopoetic systems of Notopterus notopterus after 30 d of exposure.
• Glucose, lactate, total phosphorus, non-protein nitrogen, sodium, potassium, magnesium, calcium, iron and chloride were found to be increased in most cases while protein and cholesterol were found to be decreased.
• It has been concluded that these alterations in blood parameters might be due to a damage or hyperactivity of liver, kidney and endocrine glands, the main centres for controlling the tissue metabolism.

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NARX neural network approach for the monthly prediction of groundwater levels in Sylhet Sadar,Bangladesh          下载免费PDF全文

Abdullah Al Jami  Meher Uddin Himel  Khairul Hasan  Shilpy Rani Basak  Ayesha Ferdous Mita 《地下水科学与工程》2020,8(2):118-126

Groundwater is important for managing the water supply in agricultural countries like Bangladesh. Therefore, the ability to predict the changes of groundwater level is necessary for jointly planning the uses of groundwater resources. In this study, a new nonlinear autoregressive with exogenous inputs(NARX) network has been applied to simulate monthly groundwater levels in a well of Sylhet Sadar at a local scale. The Levenberg-Marquardt(LM) and Bayesian Regularization(BR) algorithms were used to train the NARX network, and the results were compared to determine the best architecture for predicting monthly groundwater levels over time. The comparison between LM and BR showed that NARX-BR has advantages over predicting monthly levels based on the Mean Squared Error(MSE), coefficient of determination(R~2), and Nash-Sutcliffe coefficient of efficiency(NSE). The results show that BR is the most accurate method for predicting groundwater levels with an error of ± 0.35 m. This method is applied to the management of irrigation water source, which provides important information for the prediction of local groundwater fluctuation at local level during a short period.  相似文献   

Plane strain deformation of a multi-layered poroelastic half-space by surface loads     

Sarva Jit Singh  Sunita Rani 《Journal of Earth System Science》2006,115(6):685-694

The Biot linearized quasi-static theory of fluid-infiltrated porous materials is used to formulate the problem of the two-dimensional plane strain deformation of a multi-layered poroelastic half-space by surface loads. The Fourier-Laplace transforms of the stresses, displacements, pore pressure and fluid flux in each homogeneous layer of the multi-layered half-space are expressed in terms of six arbitrary constants. Generalized Thomson-Haskell matrix method is used to obtain the deformation field. Simplified explicit expressions for the elements of the 6 × 6 propagator matrix for the poroelastic medium are obtained. As an example of the possible applications of the analytical formulation developed, formal solution is given for normal strip loading, normal line loading and shear line loading.  相似文献   

Quasi-static deformation due to two-dimensional seismic sources embedded in an elastic half-space in welded contact with a poroelastic half-space     

Sunita Rani  Sarva Jit Singh 《Journal of Earth System Science》2007,116(2):99-111

The Biot linearized theory of fluid saturated porous materials is used to study the plane strain deformation of a two-phase medium consisting of a homogeneous, isotropic, poroelastic half-space in welded contact with a homogeneous, isotropic, perfectly elastic half-space caused by a two-dimensional source in the elastic half-space. The integral expressions for the displacements and stresses in the two half-spaces in welded contact are obtained from the corresponding expressions for an unbounded elastic medium by applying suitable boundary conditions at the interface. The case of a long dip-slip fault is discussed in detail. The integrals for this source are solved analytically for two limiting cases: (i) undrained conditions in the high frequency limit, and (ii) steady state drained conditions as the frequency approaches zero. It has been verified that the solution for the drained case (ω → 0) coincides with the known elastic solution. The drained and undrained displacements and stresses are compared graphically. Diffusion of the pore pressure with time is also studied.  相似文献