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Not AvailableAn attempt was made to assess the sedimentation in Nanak Sagar reservoir using multi-dated Remote Sensing (RS) images. IRS LISS III and Landsat-8 (OLI) remote sensing data were taken in the year 2007 and 2015, respectively. The original capacity curve (1962) was optimized for the study of the capacity loss to various water levels. Results showed that the morphology of the reservoir has been changed significantly due to sedimentation from 1962 to 2015. The reservoir has lost a total of 2934.64 hectares (ha) by dint of sedimentation which is accounted for 59.89 % of the total water spread area during last 53 years and average deposition was computed as 1.13% per year. From the year1962 to 2007 maximum siltation deposited in Full Storage Level (FRL) of the reservoir and from 2007 to 2015 in Dead Storage Level (DRL)in the period 2007 to 2015. It can be concluded that multi-dated remote sensing images can be used as a valuable tool for the study of temporal as well as spatial changes in any large water body.Not Availabl

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Not AvailableA limnological investigation of the manmade reservoir is necessary to evaluate the potential fish production and to provide information that could be useful in fisheries development planning. In this direction, the present study was conducted on Nanak Sagar reservoir located on Deoha River in the Tarai region of Uttarakhand. The reservoir was divided into three zones viz., in Riverine, Transitional and Lacustrine. Fourteen hydrological parameters were analyzed for various seasons such as Monsoon, Post-monsoon and Pre-monsoon from July 2014 to June 2015. The assessment of water quality of the reservoir reflects the uses of water, as well as the condition of the site from where water sample was taken. It is also noteworthy that when intensive sampling has been carried out throughout a reservoir basin to generate a “true” mean for the more common trophic state variables such as nitrogen, phosphorus and silicate concentrations, the volume weighted mean values have often been statistically indistinguishable from those measured in the different zone. Tropic status of the reservoir was mesotropic in nature found on the basis of hydrological indices. Good status of water quality of this reservoir is essential for the development of culture and capture based fisheries.Not Availabl

VISBREAKING-A FLEXIBLE PROCESS FOR UPGRADING OF RESIDUE

In context of the present scenario of refining of crude, Thermal Conversion Processes are getting renewed interest in upgrading the residual fractions. With the very heavy feed stocks the simplest and cheapest options available are the thermal processes namely Visbreaking and Delayed Coking. IIP/EIL have developed indigenous visbreaking and Delayed Coking technologies. Exclusive pilot plant studies to generate data, improve and optimize the proc.ess were carried out at lIP. At Visbreaking pilot plant the feedstock having viscosities in the range of 33 to 15240 cSt at 100°C have been processed. Visbreaking process was licensed to seven Indian Refineries. For marketing the soaker visbreaking technologies globally lIP has entered into an agreement with Stone & Webster Engineering Corporation, USA. For the further advancement of this technology to improve products quality and yields work is being carried out at lIP. For upgrading of heavy fractions, the integration of other refining processes with thermal conversion can improve the yield of desirable products. Conversion and fuel oil stability has also been discussed in this paper