Political

Article and Image Courtesy: Consortium for DEWATS Dessemination Society

The July edition of e-Disha published by the Consortium of DEWATS Dissemination Society (CDD) has the following highlights:

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.

The report examines the effect of periodicity in the rainfall records on the water availability of Damanganga basin in Nasik and Thane districts of Maharashtra. Based on the rainfall-runoff record of a shorter period, runoff series for a longer period is developed using a water balance model. The per cent deviation in water availability estimations computed using short term wet and dry records from the complete records is examined. The effect of length of time-series on the water availability estimates is also studied.

In this report, a mathematical model capable of computing the flow depth and discharge in each of the branched flows is developed using gradually varied flow equations. This model can handle three flow situations viz. temporary flow diversion, a cut-off channel and a single river island. Computational capability of the model is increased to handle irregular cross sections of a river.

In the present report a mathematical model has been developed for the study of stream aquifer interaction in multilayered system viz. a three-aquifer system, in which aquifers are separated by aquitards, considering varying stream-stage and vertical flow through aquitards. The model enables the computation of rates of recharge to the upper aquifer and exchanges of flow among aquifers along with the spatial and temporal distributions of piezometric heads in the aquifers.

Organizer: Centre for Science and Environment

Venue: Centre for Science and Environment, 41 Tughlakabad Institutional Area, New Delhi

Description:

The water and sewage management in cities will determine the quality of life in urban India. Most cities are today water stressed, unable to cope with the water demand of the growing urban populations and to treat the resulting wastewater.

Article & Image Courtesy: Department of Science and Technology

DATE FOR SUBMISSION: July 30, 2010

Department of Science and Technology (DST), through Consultancy Development Centre (CDC), invites Expression of Interest (EoI) to provide solutions for water challenges under Technology Mission: Winning, Augmentation and Renovation (WAR) for Water from Indian and overseas Enterprises.