Discussion on a paper by W.-H. Wu and H. A. Smith     

V. K. Gupta  M. D. Trifunac 《地震工程与结构动力学》1995,24(11):1541-1542

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Acute Toxicity of Some Industrial Effluents in Relation to the Fish Size of Cyprinus carpio (HAM.) and Channa punctatus (BLOCH)     

S. Gupta 《洁净——土壤、空气、水》1987,15(2):185-192

The fish Cyprinus carpio (HAM.) and Channa punctatus (BL.) of the size ranging between 6.0 ± 1.2 cm and 28.0 ± 1.6 cm were exposed to different concentrations of industrial effluents from M/s Punjab Tannery Ltd. (Jalandhar), M/s Spinning Mill Ltd. (Hoshiarpur) and M/s Food Specialist Ltd. (Moga) for evaluating the influence of fish size on the acute toxicity of these effluents. Results indicate that the relative toxicity of the effluents decreased with the increase in fish size from 6.0 ± 1.2 cm to 20.6 ± 1.5 cm. However, for specimens of the size of 28.0 ± 1.6 cm and more, the toxicity of the effluents increased with an increase in fish size. On the basis of the relative toxicity to fish, effluent from Punjab Tannery was found highly toxic and from Food Specialist Industry, the least toxic.  相似文献   

On the interpretation of the distinctive pattern of geomagnetic induction observed in northwest India     

F.H. Chamalaun  S.N. Prasad  F.E.M. Lilley  B.J. Srivastava  B.P. Singh  B.R. Arora 《Tectonophysics》1987,140(2-4):247-255

The geomagnetic variation data from the 1979 Indian array experiment have been reanalyzed and reexamined using the hypothetical event analysis technique. The contour map of the |Z/H ratio replicates distinctive anomaly in northwest India previously delineated in maps of the Fourier coefficients. The anomaly reveals the presence of a significant conductor under the Ganga basin. The contour map has been used to derive a response profile perpendicular to the strike of the anomaly, for comparison with 2-D numerical models. An excellent fit was found for a conductor at a depth of 32 km, with a width of 110 km and a conductivity contrast of 1000. This result places the conductor deep within the lithosphere. In the absence of supporting data the origin of the conductor is difficult to resolve. However, it is thought to be related to pressure-released partial melting, caused by fracturing of the Indian crust during the collision of India with Asia.  相似文献   

Soil,landuse and land evaluation studies of Patna area Bihar     

M. L. Manchanda  Jitendra Prasad  H. S. Iyer  R. S Shukla  S. Dasgupta 《Journal of the Indian Society of Remote Sensing》1982,10(3):55-67

The soil and landuse surveys have been conducted in Patna area, Bihar, using aerial photos of 1:25,000 scale. Three major systems, Ganges Gandak and interfluvial plain, have been identified in the area. These were further sub-divided into levees plains and channels etc. The soils were classified according to Soil axonomy. The major land use of the area is cultivation (62.2%) (Upland, lowland and wet land crops) plantation (1.8%) habitation (16.0%), water bodies (8.8%), barren lands (9.4%) and miscellaneous (1.8%). The soils of the area have been evaluated for different land utilization types-upland crops, lowland crops, and habitation. For paddy 75.:%, upland crops 8.2% and for habitation 57%, area was found suitable.  相似文献   

Comparative Toxicity of Certain Non-Insecticidal Chemicals to Mesocyclops leuckarti,the Carrier Host of Dracunculosis     

S. Mehta  A. N. Gupta  R. C. Srivastava 《洁净——土壤、空气、水》1982,10(4):361-365

The relative toxicities of seven non insecticidal chemicals to Mesocyclops leuckarti were tested. The relative toxicity of each chemical is given as under: Chlorine water > Potassium permanganate > Cetavlon > Quicklime > Common alum > Savlon > Sodium bicarbonate.  相似文献   

Three-dimensional hybrid modelling of soil-structure interaction     

Sunil Gupta  Joseph Penzien  T. W. Lin  C. S. Yeh 《地震工程与结构动力学》1982,10(1):69-87

A three-dimensional hybrid model for the analysis of soil-structure interaction under dynamic conditions is developed which takes advantage of the desirable features of the finite element and substructure methods and which minimizes their undesirable features. The modelling is achieved by partitioning the total soil-structure system into a near-field and a far-field with a hemispherical interface. The near-field, which consists of the structure to be analysed and a finite region of soil around it, is modelled by finite elements. The semi-infinite far-field is modelled by distributed impedance functions at the interface which are determined by system identification methods. Numerical results indicate that the proposed model makes possible realistic and economical assessment of three-dimensional soil-structure interaction for both surface and embedded structures.  相似文献   

Geophysical surveys in Parvati valley geothermal field, Kullu, India     

S.B. Rakesh Kumar  Singh  Mohan  L. Gupta  G.V. Rao 《Journal of Volcanology and Geothermal Research》1982,13(3-4)

Direct current resistivity surveys and shallow temperature measurements were carried out for geothermal exploration in a part of Parvati valley, goethermal field, Himachal Pradesh, India. At a few places, the Schlumberger soundings pointed to the presence of a relatively low-resistivity shallow layer, which probably represents fractured and jointed quartzite, saturated with hot/cold water. Wenner resistivity profiles indicate the presence of some possible shallow subsurface lateral hot water channels across the valley at Manikaran. Shallow temperature measurements show a good subsurface thermal anomaly near the confluence of the rivers Brahmaganga and Parvati. The results of the survey, together with other available geodata, suggest that an anomalous heat source does not lie beneath the study area.It is postulated that the meteoric water, originating at high elevations after heating as a result of circulation at depth, emerges at the surface in the Parvati valley as hot springs, after mixing in various proportions with near surface cold waters.  相似文献   

Is shillong region, northeast india, undergoing a dilatancy stage precursory to a large earthquake?     

Harsh K. Gupta  V.P. Singh 《Tectonophysics》1982,85(1-2)

Gupta H.K. and Singh V.P., 1982. Is Shillong region, northeast India, undergoing a dilatancy stage precursory to a large earthquake? In: A.L. Hales and Z. Suzuki (Editors), Earthquake Prediction. Tectonophysics, 85: 31–33.  相似文献   

Use of remote sensing techniques for agricultural land use survey,classification and planning     

B. M. Singh  M. L. Manchanda  H. S. Iyer  L. M. Pande  Jitendra Prasad  B. R. M. Rao 《Journal of the Indian Society of Remote Sensing》1983,11(3):1-13

A critical appraisal of the need and use of remote sensing techniques for land use mapping with particular reference to Indian conditions have been made. Land use classification system based on physiography, utility, management and identification have been suggested using remote sensing techniques at different levels of mapping.  相似文献   

Multi level land use surveys using remote sensing techniques     

M. L. Manchanda  H. S. Iyer  B. M. Singh  Jitendra Prasad 《Journal of the Indian Society of Remote Sensing》1983,11(3):67-74

The use of Landsat imagery at 1:1 M and 1:250,000 and aerial photos on 1:65,000 and 1:20,000 scale have been used to study landuse. It has been possible to achieve identification using Landsat imagery up to utility level ( level 1 and II ) and with the aerial photographs further subdivisions of utility into management and identification (level III and IV) .  相似文献