Research Reports: Recent submissions

  • RN-20 : Rainfall-runoff relationships 
    Ramasastri, K. S.; Seth, S. M. (National Institute of Hydrology, 1985)
    For estimating dependable yield while planning and designing water resources development projects, long period series of stream flow are required. However, since the flow data are generally available ...
  • RN-19 : Comparative study of self-recording raingauges 
    Seth, S. M.; Ramasastri, K. S. (National Institute of Hydrology, 1985)
    Measurement of precipitation with gauges dates back to more than 2000 years. With the development of civilization and science, the demand for intensity of precipitation and its distribution in ...
  • RN-18 : Time series analysis models 
    Seth, S. M.; Goel, N. K. (1985)
    Time series analysis belongs to major statistical techniques used in the extraction of information on hydrologic and water resources random variables from observed data.-This report gives a brief ...
  • RN-17 : Regional unit hydrograph 
    Seth, S. M.; Singh, R. D. (National Institute of Hydrology, 1985)
    The estimation of runoff from the watershed is needed for comprehensive water resources planning, flood flow forecast, adequate design of hydraulic structures etc. The climatic and physical characteristics ...
  • RN-16 : Estimation of evapotranspiration for variable water table situations 
    Soni, B.; Mishra, G. C. (National Institute of Hydrology, 1985)
    Many investigators have studied rates of evaporation from soils where water table is at shallow depth. The rate of evaporation may be controlled by either the capacity of ...
  • RN-15 : Use of catchment characteristics for unit hydrograph derivation 
    Seth, S. M.; Singh, R. D. (National Institute of Hydrology, 1984)
    A lack of meteorological and hydrological data is one of the greatest obstacles to accurate estimation of design flood or volumes of runoff. The hydrologist is usually faced with the problem ...
  • RN-14 : Regional flood frequency analysis 
    Seth, S. M. (1984)
    The main objective of hydrological studies of floods is to develop appropriate procedures in order to arrive at desired design variable for the particular structure to be safe under extremes of ...
  • RN-13 : Comparative study of components of watershed models 
    Seth, S. M.; Datta, Bhaskar; Singh, R. D. (National Institute of Hydrology, 1984)
    The rainfall runoff process in a catchment is a complex and complicated phenomenon governed by large number of known and unknown physiographic factors that vary both in ...
  • RN-12 Hydraulic routing techniques 
    Seth, S. M.; Palaniappan, A. B. (National Institute of Hydrology, 1984)
    Routing of flood in open channel is one of the unsteady flow problem of importance to engineers. Flood routing is a computational procedure aiming at tracing of a flood wave incident ...
  • RN-11 : Overland flow 
    Seth, S. M.; Singh, R. D. (National Institute of Hydrology, 1984)
    Overland flow is defined as a thin sheet flow occurring before surface irregularities cause a gathering of runoff into discrete stream channels. The primary distinguishing characteristic of ...
  • RN-10 : Hydrological parameters in drainage studies 
    Mishra, G. C. (National Institute of Hydrology, 1984)
    The understanding of land phase of the hydrologic cycle plays an important role in design of field drainage system. Physical features(topography, geology; soil characteristics) meteorological (temperature; ...
  • RN-9 : Study of hydrogeological parameters 
    Chachadi, A. G.; Mishra, G. C. (National Institute of Hydrology, 1984)
    Frequently, the groundwater modeller faces with the problem of input parameters to-the model. Hydrogeological parameters like hydraulic conductivity, transmissivity, storativity and specific yield form ...
  • RN-8 : Hydrologic flood routing including data requirement 
    Seth, S. M.; Perumal, M. (National Institute of Hydrology, 1984)
    Flood routing is used to simulate flood wave movement through river reaches and reservoirs. There are two types of flood routing methods used in practice viz., hydraulic flood ...
  • RN-7 : Data collection and transmission system 
    Seth, S. M.; Goyal, V. C. (National Institute of Hydrology, 1984)
    The report reviews the various systems of data collection and transmission in hydrology and hydrometeorology. Data on precipitation, evaporation temperature, humidity, wind velocity, sunshine hours, water level, ...
  • RN-6 : Hydrologic soil classification 
    Soni, B.; Mishra, G. C. (National Institute of Hydrology, 1984)
    Hydrologic soil classification refers to a group of soil series that can be considered homogeneous in respect of soil characteristics. Hydrologic soil classification is useful for estimation of runoff. ...
  • RN-5 : Partial duration series model 
    Seth, S. M.; Goel, N. K. (National Institute of Hydrology, 1984)
    The basic requirement of flood frequency analysis is to know the probability with which a flow Q is exceeded during a stated design life of a particular project. The partial duration series ...
  • RN-4 : Rainfall recharge 
    Ethirajan, K.; Mishra, G. C. (1985)
    The natural hydrological phenomenon of rainfall recharge is very complex to study, analyse, and evaluate due to the unpredictable unbounded random variable nature of its input ...
  • RN-3 : Hydrogeological parameters in hard rock area 
    Mishra, G. C.; Chachadi, A. G. (National Institute of Hydrology, 1984)
    The wide use of large-diameter wells for groundwater abstraction especially in hard rock areas calls for a thorough understanding of the flow dynamics in these wells for better management and ...
  • RN-2 : Optimization and programming techniques for reservoir operation 
    Seethapathi, P. V.; Jain, S. K. (National Institute of Hydrology, 1984)
    Optimization is one of the most powerful and popular technique for solving various problems associated with the operation of a reservoir. During the past few years, its use has grown tremendously due to wider availability ...
  • RN-1 : Hydrogeological investigations of the Ganga Hindon inter basin - Upper Ganga canal command area 
    Mishra, G. C.; Chachadi, A. G. (National Institute of Hydrology, 1982)
    The command of Upper Ganga Canal (UGC) system covers an area of about 24,500 sq.km. located between the rivers Ganga and Yamuna and forms a part of the Gangetic alluvial plain. The area is characterised ...

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