The dielectric constant of mercuric iodide (HgI2) in the form of single crystals has been measure... more The dielectric constant of mercuric iodide (HgI2) in the form of single crystals has been measured both parallel and perpendicular to the c axis. The dependence of the dielectric constant on temperature in the range 300K to 100K has been investigated. This reveals a lowering of dielectric constant with temperature from a value of 10.4 at 300K to 4.0 at 110K. The values of the dielectric constant in both directions are nearly the same, indicating that there is very little anisotropy in HgI2 crystals.
Hydro power is recognized as a renewable source of energy, which is economical, nonpolluting and ... more Hydro power is recognized as a renewable source of energy, which is economical, nonpolluting and environmentally benign. Small and mini hydel projects have the potential to provide energy in remote and hilly areas where extension of grid system is un-economical. In this background, a hydel power project has been proposed to be constructed by Bihar State Hydroelectric Power Corporation Limited, Government of Bihar Enterprise, India on Tiljuga Dhar (a tributary of Kosi River flowing from Nepal) at Nirmali near Hariyahi village of Supaul district in the State of Bihar in India. The basic infrastructural need of this hilly terrain is environment friendly source of power which will accelerate the development of agro-based industries and arrest exodus of people in search of livelihood and would also control insurgency. The present work reports the feasibility analysis of the aforementioned hydel project. It has been found that if a dam, having 41 years of estimated reservoir life period, ...
Daily rainfall data of 21 years (from 1983 to 2003) for Bankura district of West Bengal were anal... more Daily rainfall data of 21 years (from 1983 to 2003) for Bankura district of West Bengal were analyzed to ascertain their fit to several probability distributions. The series generated by using Weibull's plotting position formula was treated as the Observed series. ...
The work addressed here determines an appropriate strategy for operating a system of four multipu... more The work addressed here determines an appropriate strategy for operating a system of four multipurpose and one single purpose reser voirs managed by the Damodar Valley Corporation (DVC) which is partially completed and located in eastern India. The performance of the system to meet the various demands in the basin and the degree of their dependability have been determined using
Impact of Climate Change on Natural Resource Management, 2010
Chapter 7 Determination of Urbanization Impact on Rain Water Quality with the Help of Water Quali... more Chapter 7 Determination of Urbanization Impact on Rain Water Quality with the Help of Water Quality Index and Urbanization Index Sanjib Das, Mrinmoy Majumder, Debasri Roy1 and Asis Mazumdar Abstract Rain water quality is a vital factor for deciding whether the water is ...
ABSTRACT The HEC-HMS model (Hydrologic Modeling System), developed by the Hydrologic Engineering ... more ABSTRACT The HEC-HMS model (Hydrologic Modeling System), developed by the Hydrologic Engineering Center, USA (HEC) was evaluated for its applicability for the Damodar river basin in eastern India. Sensitivity analysis of the model was carried out for the input parameters. The study revealed that both the peak discharge and runoff volumes to be sensitive to rate of infiltration and percentage of impervious area. The Nash-Sutcliffe model efficiency criterion, percentage error in volume, the percentage error in peak and net difference of observed and simulated time to peak, were used for performance evaluation. The model demonstrated good performance, with aforementioned performance indices values ranging from 75-81%, -10.5-19.4%, -18.0-29.6% and 0-1 day for simulation of stream flow. Thus the model may be successfully applied to watersheds in the Damodar river basin.
ABSTRACT Hydro power is recognized as a renewable source of energy, which is economical, nonpollu... more ABSTRACT Hydro power is recognized as a renewable source of energy, which is economical, nonpolluting and environmentally benign. Small and mini hydel projects have the potential to provide energy in remote and hilly areas where extension of grid system is uneconomical. In this background, a hydel power project has been proposed to be constructed by Bihar State Hydroelectric Power Corporation Limited, Government of Bihar Enterprise, India on Tiljuga Dhar (a tributary of Kosi River flowing from Nepal) at Nirmali near Hariyahi village of Supaul district in the State of Bihar in India. The basic infrastructural need of this hilly terrain is environment friendly source of power which will accelerate the development of agrobased industries and arrest exodus of people in search of livelihood and would also control insurgency. The present work reports the feasibility analysis of the aforementioned hydel project. It has been found that if a dam, having 41 years of estimated reservoir life period, with a storage capacity of 7.05 MCM be constructed across Tijuga Dhar at Nirmali, a set of three hydel units with capacity of 610, 180 and 81 kW may be run in unison or alternately to generate power of 4.88 MW per annum.
ABSTRACT Assessment of impact of climate change on water resources in river basin requires a prop... more ABSTRACT Assessment of impact of climate change on water resources in river basin requires a proper estimation of availability of water and that can only be achieved by hydrological modeling of the basin. However, hydrological modeling is a complex task and hydrologic models should be well calibrated to increase user confidence in its predictive ability which makes the application of the model effective. In this study a catchment simulation model viz., Hydrologic Modeling System, developed by the Hydrologic Engineering Center, USA (HEC-HMS) (with soil moisture accounting algorithm -- SMA) has been calibrated and validated for Subarnarekha river basin in Eastern India for prediction of its hydrologic response. The analysis shows that the soil storage, tension zone storage and groundwater 1 storage coefficient to be the sensitive parameters for the simulated stream flow. The Nash - Sutcliffe model efficiency criterion, percentage error in volume, the percentage error in peak, and net difference of observed and simulated time to peak, which were used for performance evaluation, have been found to range from (0.72 to 0.84), (4.39 to 19.47%), (1.9 to 19%) and (0 to 1day) respectively, indicating a good performance of the model for simulation of stream flow and thereby quantification of available water. The study also demonstrates that the use of semi annual parameter sets that account for changing hydrologic conditions improves model performance. Thus the model may be applied to other watersheds in the Subarnarekha river basin and other hydro -meteorologically similar river basins.
The dielectric constant of mercuric iodide (HgI2) in the form of single crystals has been measure... more The dielectric constant of mercuric iodide (HgI2) in the form of single crystals has been measured both parallel and perpendicular to the c axis. The dependence of the dielectric constant on temperature in the range 300K to 100K has been investigated. This reveals a lowering of dielectric constant with temperature from a value of 10.4 at 300K to 4.0 at 110K. The values of the dielectric constant in both directions are nearly the same, indicating that there is very little anisotropy in HgI2 crystals.
Hydro power is recognized as a renewable source of energy, which is economical, nonpolluting and ... more Hydro power is recognized as a renewable source of energy, which is economical, nonpolluting and environmentally benign. Small and mini hydel projects have the potential to provide energy in remote and hilly areas where extension of grid system is un-economical. In this background, a hydel power project has been proposed to be constructed by Bihar State Hydroelectric Power Corporation Limited, Government of Bihar Enterprise, India on Tiljuga Dhar (a tributary of Kosi River flowing from Nepal) at Nirmali near Hariyahi village of Supaul district in the State of Bihar in India. The basic infrastructural need of this hilly terrain is environment friendly source of power which will accelerate the development of agro-based industries and arrest exodus of people in search of livelihood and would also control insurgency. The present work reports the feasibility analysis of the aforementioned hydel project. It has been found that if a dam, having 41 years of estimated reservoir life period, ...
Daily rainfall data of 21 years (from 1983 to 2003) for Bankura district of West Bengal were anal... more Daily rainfall data of 21 years (from 1983 to 2003) for Bankura district of West Bengal were analyzed to ascertain their fit to several probability distributions. The series generated by using Weibull's plotting position formula was treated as the Observed series. ...
The work addressed here determines an appropriate strategy for operating a system of four multipu... more The work addressed here determines an appropriate strategy for operating a system of four multipurpose and one single purpose reser voirs managed by the Damodar Valley Corporation (DVC) which is partially completed and located in eastern India. The performance of the system to meet the various demands in the basin and the degree of their dependability have been determined using
Impact of Climate Change on Natural Resource Management, 2010
Chapter 7 Determination of Urbanization Impact on Rain Water Quality with the Help of Water Quali... more Chapter 7 Determination of Urbanization Impact on Rain Water Quality with the Help of Water Quality Index and Urbanization Index Sanjib Das, Mrinmoy Majumder, Debasri Roy1 and Asis Mazumdar Abstract Rain water quality is a vital factor for deciding whether the water is ...
ABSTRACT The HEC-HMS model (Hydrologic Modeling System), developed by the Hydrologic Engineering ... more ABSTRACT The HEC-HMS model (Hydrologic Modeling System), developed by the Hydrologic Engineering Center, USA (HEC) was evaluated for its applicability for the Damodar river basin in eastern India. Sensitivity analysis of the model was carried out for the input parameters. The study revealed that both the peak discharge and runoff volumes to be sensitive to rate of infiltration and percentage of impervious area. The Nash-Sutcliffe model efficiency criterion, percentage error in volume, the percentage error in peak and net difference of observed and simulated time to peak, were used for performance evaluation. The model demonstrated good performance, with aforementioned performance indices values ranging from 75-81%, -10.5-19.4%, -18.0-29.6% and 0-1 day for simulation of stream flow. Thus the model may be successfully applied to watersheds in the Damodar river basin.
ABSTRACT Hydro power is recognized as a renewable source of energy, which is economical, nonpollu... more ABSTRACT Hydro power is recognized as a renewable source of energy, which is economical, nonpolluting and environmentally benign. Small and mini hydel projects have the potential to provide energy in remote and hilly areas where extension of grid system is uneconomical. In this background, a hydel power project has been proposed to be constructed by Bihar State Hydroelectric Power Corporation Limited, Government of Bihar Enterprise, India on Tiljuga Dhar (a tributary of Kosi River flowing from Nepal) at Nirmali near Hariyahi village of Supaul district in the State of Bihar in India. The basic infrastructural need of this hilly terrain is environment friendly source of power which will accelerate the development of agrobased industries and arrest exodus of people in search of livelihood and would also control insurgency. The present work reports the feasibility analysis of the aforementioned hydel project. It has been found that if a dam, having 41 years of estimated reservoir life period, with a storage capacity of 7.05 MCM be constructed across Tijuga Dhar at Nirmali, a set of three hydel units with capacity of 610, 180 and 81 kW may be run in unison or alternately to generate power of 4.88 MW per annum.
ABSTRACT Assessment of impact of climate change on water resources in river basin requires a prop... more ABSTRACT Assessment of impact of climate change on water resources in river basin requires a proper estimation of availability of water and that can only be achieved by hydrological modeling of the basin. However, hydrological modeling is a complex task and hydrologic models should be well calibrated to increase user confidence in its predictive ability which makes the application of the model effective. In this study a catchment simulation model viz., Hydrologic Modeling System, developed by the Hydrologic Engineering Center, USA (HEC-HMS) (with soil moisture accounting algorithm -- SMA) has been calibrated and validated for Subarnarekha river basin in Eastern India for prediction of its hydrologic response. The analysis shows that the soil storage, tension zone storage and groundwater 1 storage coefficient to be the sensitive parameters for the simulated stream flow. The Nash - Sutcliffe model efficiency criterion, percentage error in volume, the percentage error in peak, and net difference of observed and simulated time to peak, which were used for performance evaluation, have been found to range from (0.72 to 0.84), (4.39 to 19.47%), (1.9 to 19%) and (0 to 1day) respectively, indicating a good performance of the model for simulation of stream flow and thereby quantification of available water. The study also demonstrates that the use of semi annual parameter sets that account for changing hydrologic conditions improves model performance. Thus the model may be applied to other watersheds in the Subarnarekha river basin and other hydro -meteorologically similar river basins.
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