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Development of regional flood frequency relationships using L-moments for South Bihar – A research report by the National Institute of Hydrology

In this study, regional flood frequency relationships have been developed using L-moments for South Bihar, in the alluvial plains of Indo-Gangetic basin and Kaimur-Chhotanagpur Santhal Pargana plateau. The annual maximum peak flood data of twenty-two gauging sites whose catchment areas vary from 11.7 to 3171 sqkm have been used. The mean annual peak floods of these sites vary from 29.15 cumec to 1293.2 cumec. Comparative regional flood frequency analysis studies have been carried out using some of the commonly used frequency distributions viz Extreme Value (EV1), General Extreme Value (GEV), Normal, Log Pareto (GPA) and Wakeby based on L-moments approach.Read More

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Development of regional flood frequency relationships using L-moments for South Bihar by NIH (1999-2000)1.46 MB
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Development of regional flood formula using L moments for north Brahmaputra river system – A research report by National Institute of Hydrology

In this study, an attempt has been made to develop a regional flood formula using L-moments for the north Brahmaputra river system. The annual maximum peak flood data of twelve gauging sites of the north bank tributaries of the river have been considered. The screening of the data has been carried out for assessing the suitability of the data for regional flood frequency analysis by computing the Discordancy Measure (Di) in terms of L-moments. Also, homogeneity of the region has been tested using the L-moment based heterogeneity measure, H.Read More

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Development of regional flood formula using L-moments for north Brahmaputra river system by NIH (1999-2000)1.79 MB
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Regional flood frequency analysis using L-moments - A research report by National Institute of Hydrology

The report presents regional flood frequency curves developed by fitting L-moment based GEV distribution to annual maximum peak flood data of small to medium sized catchments of the seven hydrometeorological sub-zones of zone 3 and combined zone 3 of India. The effect of regional heterogeneity is studied by comparing the growth factors of various sub-zones and combined zone 3. The flood frequency curves based on probability weighted moment (PWM) approach have been compared with the flood frequency curves based on L moment approach.Read More

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Regional flood frequency analysis using L moments by NIH (1997-98)1.48 MB
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Space time distribution of rainfall in the catchment of Yeleru river downstream of Yeleswaram - A research report by National Institute of Hydrology

The study attempts to do a space-time distribution of rainstorms associated with the tropical cyclones in the Bay of Bengal over a period of 20 years from 1976 to 1996.

The magnitude of peak flood and shape of the flood hydrograph depends not only on the magnitude of the total storm rainfall but also on its distribution in space and time. Improvements of the accuracy and timeliness of hydrological forecasting would thus largely depend on the prediction of rainfall distribution in space and time.Read More

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Space-Time distribution of rainfall in the catchment of Yeleru river downstream of Yeleswaram by NIH (1996-97)824.63 KB

Location

Yeleswaram, AP, India
Latitude: 17.286510, Longitude: 82.109909

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Rainfall-runoff modeling in Baitarni river upto Anandpur using HEC-1 model - A research report by National Institute of Hydrology

The study applies a hydraulic simulation model, Hydrologic Engineering Centre (HEC-1) to Baitarni river for modeling hourly flows of the river at Anandapur gauging site. HEC-1 model had been developed by US Army Corps of Engineers, for rainfall-runoff modeling. It provides a powerful automatic optimization technique for estimation of some of the parameters. The optimization technique of the model has been utilized in the present study and model parameters have been calibrated and validated for the study area.Read More

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Rainfall runoff modelling of Baitarani river basin upto Anandapura using HEC-1 by NIH (1998-99)427.2 KB

Location

Anandapur, OR, India
Latitude: 21.225561, Longitude: 86.111969

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Development of regional flood formulae using L-moments for middle Ganga plains – A research report by National Institute of Hydrology

The study develops regional flood frequency relationship and flood formulae based on recently developed efficient techniques of flood frequency analysis to estimate floods of desired return periods for small to moderate size gauged and ungauged catchments of the middle Ganga plains (sub-zone 1F) encompassing parts of Uttar Pradesh, Bihar and West Bengal. A regional flood formula has been developed by coupling the L-moment based regional flood frequency relationship with the regional relationship between mean annual peak flood and the catchment area.Read More

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Development of regional flood formulae using L- Moments for middle Ganga plains by NIH (2000-01)1.81 MB
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