Research Reports: Recent submissions

  • RN-40 : Comprehensive review of drought indices 
    Sikka, A. K. (National Institute of Hydrology, 1986)
    Scores of drought definitions are available in the literature developed by a variety of disciplines because it affects so many economic and social sectors. Drought holds different connotations to different people. The ...
  • RN-39 : Remote sensing applications for flood inundation studies 
    Bhar, A.K. (National Institute of Hydrology, 1986)
    Mankind is beset with flood problems from the very ancient time. Fury of flood leaves its crippling effect on the economy. Flood inundation is one of the basic data need to understand, combat ...
  • RN-38 : Measurement of snow and estimation of snow cover 
    Singh, Pratap (National Institute of Hydrology, 1986)
    The rivers draining out of the Himalayan region derive a major portion runoff from snow and ice melt. For runoff forecasting, irrigation planning, supply of drinking water and industrial use etc. reliable and ...
  • RN-37 : Hydrological aspects of droughts 
    Singh, R. D. (National Institute of Hydrology, 1986)
    Drought forms one extreme end of the hydrologic cycle. It represents a period of abnormally dry weather sufficiently prolonged for the lack of precipitation to cause a serious hydrological imbalance and connotations of ...
  • RN-36 : Vegetation management for increased water yield 
    Sikka, A. K.; Lohani, Vinay K. (National Institute of Hydrology, 1985)
    Studies done in India and elsewhere have indicated that the vegetation management practices have a great potential in increasing water yield from a watershed. The vegetation management practices include ...
  • RN-35 : Flood foresting models 
    Seth, S. M.; Goel, N. K. (National Institute of Hydrology, 1985)
    A hydrological forecast is the prior estimate of the future state of hydrological phenomena based on the knowledge of underlying physical laws and the modifying effects of specific geographic conditions. The ...
  • RN-34 : Conjunctive use of surface and ground water 
    Kamal (National Institute of Hydrology, 1985)
    In a general sense, factors that must be considered in conjunctive use analyses have been identified and discussed. The factors have been distilled from the work of many authors who have examined ...
  • RN-33 : Atmospheric general circulation models 
    Ramasastri, K. S.; Singh, Pratap (National Institute of Hydrology, 1985)
    Hydrological cycle encompasses in itself two major processes the atmosphere phase and the ocean-land surface phase. Mathematical and conceptual modelling of these two processes independently have been ...
  • RN-32 : Telemetry systems and signal analyzers for data transmission 
    Goyal, V. C.; Seth, S. M. (National Institute of Hydrology, 1985)
    Data transmission is an integral part of any data acquisition system. The link between the sensor and the recording system can be physical or telemetric i.e. signal from the sensor is converted into radio ...
  • RN-31 : Geophysical investigations for hydrological studies 
    Goyal, V. C.; Chand, Ramesh; Seth, S. M. (National Institute of Hydrology, 1985)
    Geophysical investigations are effectively utilized in various hydrological applications. They provide fast and economic means of handling hydro-geological problems like exploration for groundwater, studies on ...
  • RN-30 : Flash flood studies 
    Perumal, M.; Kumar, Ravi (National Institute of Hydrology, 1985)
    Flash floods occurs suddenly and it is usually difficult forecast because of short time available between their causative event and their actual occurrence. Flash floods generally result ...
  • RN-29 : Land use/vegetal cover mapping using satellite data 
    Kumar, Anil; Nigam, A. K. (National Institute of Hydrology, 1985)
    Land use vegetal cover characteristics of a watershed has a significant influence on the quality and quantity of runoff available from it. Various hydrologic processes such as infiltration, evapotranspiration, ...
  • RN-28 : Snowline and snow cover mapping by remote sensing techniques 
    Bhar, A.K. (National Institute of Hydrology, 1985)
    Snow and ice is a major component of Water Resources and it is hydrologically important in India because of the presence of mighty snow clad Himalayas. Major north Indian rivers originate from the ...
  • RN-27 : Hydrological applications of micro processors 
    Goyal, V. C.; Seth, S. M. (National Institute of Hydrology, 1985)
    Microprocessors and microcomputers are increasingly being used in a number of hydrometeorological data collection systems. Almost all modern data acquisition systems use microprocessors for collection ...
  • RN-26 : Sedimentation in reservoirs 
    Bhatia, K. K. S. (National Institute of Hydrology, 1985)
    Sedimentation is a natural process which occurs whenever the flow of a sediment carrying river is impounded by any kind of obstacle. Proper management of water resources often requires the construction of ...
  • RN-25 : Range analysis for storage 
    Seethapathi, P. V.; Jain, S. K. (National Institute of Hydrology, 1985)
    The range analysis is a part of the general probability theory of storage. In this report the works dealing with the range analysis for storage related problems have been reviewed. In the beginning, ...
  • RN-24 : Environmental isotopes for hydrological investigations 
    Chand, Ramesh; Seth, S. M. (National Institute of Hydrology, 1985)
    In this report it is proposed to review the status of applications of environmental isotopes in hydrological investigations. These include Tritium H³ Carbon-14(C14), naturally occurring isotopes and ...
  • RN-23 : Irrigation return flow 
    Harikrishna, H.; Mishra, G. C. (National Institute of Hydrology, 1985)
    In irrigation practices, certain portion of the applied water, over and above the consumptive use, infiltrates into the ground to reach either an aquifer as deep percolation or to a nearby stream ...
  • RN-22 : Effect of channel processes on flood routing 
    Palaniappan, A. B.; Seth, S. M. (National Institute of Hydrology, 1985)
    Although a river occupies a small portion of the. catchment, its role in shaping the landscape is enormous. The river and the adjoining plains and as a matter of fact, the whole catchment undergoes ...
  • RN-21 : Effect of flood plain on flood routing 
    Palaniappan, A. B.; Seth, S. M. (National Institute of Hydrology, 1985)
    Because of ever increasing human activities in the flood plains, the river environment gets affected. The movement of flood along the flood plains is quite complex. The flood plains act as ...

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