Rivers

A study of saline freshwater interface phenomenon in the Mahanadi delta region, Orissa
The subsurface aquifer systems in Mahanadi delta region in Orissa (India) is largely characterized by two groups of freshwater aquifer systems: 1. The south western Mahanadi delta region is represented by unconfined to semi-confined freshwater aquifers underlained by brackish/ saline aquifer systems with a diffusion boundary 2. The north eastern parts of Mahanadi delta is represented by deep freshwater confined aquifers overlained by brackish/saline water aquifers with aquitard/ aquiclude boundary. Both the systems are prone to saline water mixing/ migration with time and development. The present paper incorporates results of a simulation study using a finite element based FEFLOW model and examines saline water migration scenarios when subjected to increasing rates of pumping under steady state conditions with the help of a calibrated groundwater model. The results indicate the unconfined and semi-confined aquifer systems in the south western part of Mahanadi delta are prone for faster rates of saline water mixing of the contamination when compared to the deep confined systems in the north eastern parts of Mahanadi delta. Posted on 02 Jul, 2010 04:47 PM

ABSTRACT

Flood studies in Satluj basin – A research report by National Institute of Hydrology
The study attempts to do flood inundation and flood plain feature mapping as well as undertake river planform measurements for a part of the river reach of Satluj. Posted on 01 Jul, 2010 01:17 PM

The study attempts to do flood inundation and flood plain feature mapping as well as undertake river planform measurements for a part of the river reach of Satluj. The river is a part of the Indus system and faces flood during monsoon months in spite of various flood control measures that have been adopted. The vast expanse of land adjoining the river course is inundated by large floods.

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 for design discharge computations and runoff modelling. Posted on 30 Jun, 2010 11:38 PM

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.

Regional low flow analysis of Narmada basin - A research report by National Institute of Hydrology
The study develops a regional hydrological model for estimating flow characteristics at ungauged sites of Narmada basin using climatological, hydrological and morphological variables. Posted on 30 Jun, 2010 08:33 PM

The study develops a regional hydrological model for estimating flow characteristics at ungauged sites of Narmada basin using climatological, hydrological and morphological variables. The term low flow is broadly used to describe stream flows that are significantly below average or below normal flow levels.

Adsorption of lead and zinc ions on sediments - A research report by National Institute of Hydrology
The study deals with adsorption of lead and zinc ions on the bed sediments of river Kali in western Uttar Pradesh.The process influences the transport of pollutants in aquatic environment. Posted on 29 Jun, 2010 10:53 PM

The study deals with adsorption of lead and zinc ions on the bed sediments of river Kali in western Uttar Pradesh. Adsorption is one of the most important processes in water quality control, which influences the transport of pollutants in aquatic environment.

Sediment yield estimation and watershed prioritization in Shakkar river – A research report by National Institute of Hydrology
The study carries out sediment yield estimation for the Shakkar catchment of the Narmada river in Madhya Pradesh using Geographical Information Systems (GIS) and image processing. Posted on 29 Jun, 2010 08:05 PM

The study carries out sediment yield estimation for the Shakkar catchment of the Narmada river in Madhya Pradesh and successfully implements a methodology for prioritization using Geographical Information Systems (GIS) and image processing on ERDAS and ILWIS software.

Development of a distributed catchment model for Kolar basin - A research report by National Institute of Hydrology
This study is about a spatially distributed unit hydrograph that was developed for the Kolar basin in Madhya Pradesh using Arc Info GIS package. Posted on 29 Jun, 2010 07:39 PM

In this study, a spatially distributed unit hydrograph was developed for the Kolar basin in Madhya Pradesh using Arc Info GIS package. The one-hour distributed hydrograph was determined for the basin using S hydrograph technique from the time-area diagram of the basin.

Development of data simulation model and irrigation schedules for Eastern Godavari delta (Andhra Pradesh) - A research report by National Institute of Hydrology
The study has been conducted to develop a data simulation model and irrigation schedules for the eastern Godavari delta irrigation system, Andhra Pradesh. Posted on 28 Jun, 2010 11:45 PM

The study has been conducted to develop a data simulation model and irrigation schedules for the eastern Godavari delta irrigation system, Andhra Pradesh. It aims at analysis of various factors that influence the irrigation operations and development of appropriate mathematical models and associated computer programs.

Modeling at Vasishta-Godavari river mouth using FESWMS – A research report by National Institute of Hydrology
The study attempts to undertake surface modeling to simulate the water levels in the mouth portion of Vasishta-Godavari by taking the tidal effect during a flood season using FESMWS. Posted on 28 Jun, 2010 10:54 PM

The study attempts to undertake surface modeling to simulate the water levels in the mouth portion of Vasishta-Godavari by taking the tidal effect during a flood season, by using the Finite Element Surface Water Modeling System (FESMWS) developed by United States Geological Survey (USGS) to model the reach. The objective is to simulate the surface water flow for a flood discharge of 2.35 lakh cusecs, under the effect of diurnal tide at the bay end.

The surface water levels of a river, especially at the mouth are required for planning and managing flood alleviation schemes and river engineering works. In the lower reaches of many rivers, flood plain inundation may result from very high tide or a very high flood or a combination of both. Also the extent of landward intrusion of saline water into a river at mouth varies with the relative strength of freshwater discharge and the co-oscillating tidal flow resulting from the dynamical interaction of the adjacent coastal waters.

Arsenic pollution in groundwater in West Bengal – A research report by National Institute of Hydrology
The report describes the results of the study of arsenic pollution in groundwater in Nadia as well as the hydro-chemical study of the river Hoogly in West Bengal. Posted on 28 Jun, 2010 09:08 PM

The report describes the results of the study of arsenic pollution in groundwater in Nadia as well as the hydro-chemical study of the river Hoogly in West Bengal. The alluvial tract along the river Hoogly covering a stretch of around 470 km encompassing eight districts is affected by arsenic pollution of ground water, the source being geogenic.

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