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Unit Hydrograph

Learning package on Hydrology by the National Institute of Hydrology

This “Learning Package on Hydrology” by the National Institute of Hydrology deals with the basic scientific concepts underlying hydrology. In a general sense the package deals with elements of the hydrologic cycle and explains the processes of rainfall, runoff and evapotranspiration and their interaction.  Read More

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Learning package on Hydrology by the National Institute of Hydrology (2000)1.85 MB
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Characteristics of short interval rainfall for Punpun basin – A research report by National Institute of Hydrology

In this study, an attempt has been made to study the characteristics of short interval rainfall data of the Punpun river basin lying in Bihar-Jharkhand, which has been identified as the representative basin for the NIH- Centre for Flood Management Studies, Patna. The estimation of flood peaks for small catchments is required for water resources planning, flood forecasting, design of various drainage systems, flood control and design of hydraulic structures.Read More

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Characteristics of short interval rainfall for Punpun basin by NIH (1999-2000)1.18 MB

Location

Daltonganj, JH, India
Latitude: 24.040760, Longitude: 84.064903

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Uncertainty analysis - GIUH based Clark model using first order analysis for a catchment of Lower Godavari sub-zone – A research report by National Institute of Hydrology

In this study, uncertainty analysis has been carried out for the parameters of the mathematical model developed at the National Institute of Hydrology for estimation of the Clark model parameters using the geomorphological characteristics of an ungauged catchment. The model has been applied for simulation of direct surface runoff (DSRO) hydrographs of the catchment defined by bridge number 807 of the Lower Godavari sub-zone 3 (f).Read More

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Uncertainity analysis - GIUH based Clark model using first order analysis for a catchment of Lower Godavari subzone - National Institute of Hydrology - Roorkee (1999-2000)2.89 MB

Location

Nagpur, MM, India
Latitude: 21.153889, Longitude: 79.083056

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Estimation of geomorphology parameters for small catchments using GIS – A research report by National Institute of Hydrology

The report deals with the estimation of geomorphology parameters for small catchments using Geographical Information Systems (GIS). Stream channel morphology is literally the study of stream channel form and structure, but generally it is taken to mean their form and structures regarded as a whole or their collective morphology features. Systematic analysis of morphometry of any drainage basin and its stream system is of great importance in understanding the hydrological behavior of the basin.Read More

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Estimation of geomorphology parameters for small catchments using GIS by NIH (1999-2000)1.51 MB

Location

Ajmer, RJ, India
Latitude: 26.443300, Longitude: 74.642693

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Flood estimation by GIS based GIUH approach for Ajay basin up to Sarath gauging site of South Bihar – A research report by the National Institute of Hydrology

In this study, the mathematical model developed at the National Institute of Hydrology for estimation of the Clark model parameters using the geomorphological characteristics of an ungauged basin has been applied for simulation of the direct surface runoff (DSRO) hydrographs of the Ajay basin up to the Sarath gauging site of South Bihar.Read More

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Flood estimation by GIS based GIUH approach for Ajay basin up to Sarath gauging site of South Bihar by NIH (1999-2000)2.57 MB
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Expert systems for unit hydrograph analysis - A research report by National Institute of Hydrology

The report deals with expert systems for unit hydrograph analysis, an emerging technology, which may in years to come, revolutionize professional activities in the field of surface water analysis and modeling. The literature review on the topic revealed the potential of application of expert system for unit hydrograph analysis. A prototype expert system has been developed for the selection of the most appropriate model for unit hydrograph derivation of a given catchment.Read More

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Expert system for unit hydrograph analysis by NIH (1997-98)1.4 MB
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Sensitivity analysis of hydrological parameters on flood hydrograph – A research report by National Institute of Hydrology

In this study, Clark’s model has been used for derivation of one-hour unit hydrograph for a catchment. The design flood estimate has been obtained using the calibrated parameters of the Clark model together with the time-area diagram corresponding to a 48-hour design storm, which has been temporally distributed and critically sequenced as a single bell, giving due consideration to the ordinates of the unit hydrograph.Read More

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Sensitivity analysis of hydrological parameters on flood hydrograph by NIH (1997-98)1.08 MB
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Hydrological land use mapping in Narmada basin from Jabalpur to Hoshangabad - A research report by National Institute of Hydrology

The study undertakes hydrological land use mapping in Narmada basin from Jabalpur to Hoshangabad by using various methods right from empirical formulae to Soil Conservation Services Curve Number (SCS-CN) method for design discharge computations and continuous runoff modeling. The SCS Curve Number method is used to derive an empirical relationship of the catchment hydrological variables and based on this the dimensional unit hydrograph is prepared and continuous runoff modeling done.Read More

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Hydrological land use mapping in Narmada basin from Jabalpur to Hoshangabad by NIH (1997-98)964.37 KB
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Rainfall-runoff modeling for water availability in Ken river basin using SCS-CN model and remote sensing approach - A research report by National Institute of Hydrology

The report is the first of a two-part study on water availability for the Ken river system and attempts to evaluate the direct surface runoff in the smaller basins, where gauging sites are not available. In this study on water availability in Ken river basin, rainfall-runoff modeling in the Sonar, Bearma and Bebas river basins, which are the sub-basins of the Ken river system, have been carried out using the Soil Conservation Services Curve Number (SCS-CN) model.

This is a widely used hydrological model for calculating the runoff using rainfall and Curve Number (CN). The SCS-CN is a quantitative descriptor of the land use, land cover and soil complex characteristics of a watershed. The CN is an index that represents the watershed runoff potential.Read More

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Rainfall-runoff modelling for water availability study in Ken river basin using SCS-CN model and remote sensing approach by NIH (1997-98)1.66 MB
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Flood estimation for large catchments using deterministic approach – A research report by National Institute of Hydrology

The report presents an interactive software that has been developed to not only provide design flood estimates for large as well as small sized catchments but also help the users analyse their historical rainfall-runoff records for calibration and validation of the various techniques for part or whole of the catchment and river reaches.Read More

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Flood estimation for large catchments using deterministic approach by NIH (1996-97)2.73 MB
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