National Institute of Hydrology (NIH)

The report gives an account of a feasibility study of rainwater harvesting in semi-arid regions. A review of water harvesting systems is followed by a section wherein numerical solutions for surface flow equations are explained. 

In this study, a two-dimensional overland flow model has been developed considering random roughness coefficients and irregular land surface for the analysis of surface flow component. The one-dimensional Richards equation for subsurface flow component has been used for calculating the infiltration from the pervious area.

The report presents the status of risk based hydrologic designs that have been reported in literature and based on these, identifies a computational procedure for developing hydrologic design bases for dams and spillways. Some illustrative examples are presented in order to demonstrate the impact of risk based analysis on current design practices.

This report describes the study of regional flood frequency analysis using peak flood series data of gauging stations of Krishna basin based on at site and regional data combined using the following methods: (a) Index-Flood method (b) PWM based EVI distribution (c) PWM based GEV distribution and (d) PWM based Wakeby distribution.

The report deals with the hydrological aspects of watershed development and describes watershed components and watershed models. It gives an account of the various watershed models in details including data requirement, input, output, various physical processes and governing equation. The suitability of a particular model to Indian condition is also highlighted in the report.

The report is a compilation of abstracts of hydrological literature from select national and international Journals for the period 1991-95. Though a sizeable number of Journals are published in the field of hydrology and water resources, scientists involved in different studies and projects find it difficult to go through all of them.

The report presents the hydrologic information and news available from print media and various government agencies mostly for the year 1996-97 compiled state-wise and problem-wise for the whole country.

In this study, the influence of a discontinuous aquitard on the seepage from a recharge source in a multilayered aquifer system, with the prescribed hydrogeological set-up, has been subjected to investigation.

The report is a compilation of abstracts and annotated bibliography of hydrological literature from select national and international Journals for the year 1996-97. Though a sizeable number of Journals are published in the field of hydrology and water resources, scientists involved in different studies and projects find it difficult to go through all of them.

This report is a compilation of the hydrological news in the print media in the country for the year 1997-98. The report is an attempt to put forth diverse hydrologic information and events reflecting the problems and indicate solutions for hydrologists, planners and water resource managers in particular. Five national newspapers like Hindustan Times, Indian Express and Hindu etc., have been referred to, for tracking the Indian hydrological events due to flood, drought, quality, demand supply and availability.