Groundwater

The report presents waterlogged area mapping and hydrological data analysis of Mokama tal area of Bihar. The drainage problems of the agriculture land use are basically associated with the stagnation of runoff and the rise of the water table. Generally, the runoff stagnation is a result of intense rain, which produces excessive runoff for which the existing drainage capacity is not adequate or outlet conditions are not favorable. The rise of water table beyond a critical limit or surface ponding results in waterlogging conditions.

The report reviews compilation of information about arsenic pollution in groundwater experienced by many countries in the world and in particular the eight districts of West Bengal. The science of arsenic pollution and the state of art of arsenic removal have been discussed and some immediate remedial measures suggested.

The report presents the study on the physio-chemical properties of soil for Basantar catchment in Jammu and Kashmir. Soil physio-chemical properties are basic inputs for any hydrological modeling and are important for efficient management of irrigated agriculture. The most important soil properties influencing irrigation are its infiltration characteristics and water holding capacity. Other soil properties such as soil texture, soil structure, capillary conductivity, soil profile conditions, and depth of water table are also given consideration in the management of irrigation water.

In this study, a two layered finite difference method has been generated for groundwater flow analysis of Ghataprabha sub-basin of Krishna river basin. The conceptual model has been calibrated for steady state conditions and validated for both steady state and transient conditions through USGS, 3D Finite Difference Code and MODFLOW. Various applications were tried out on the calibrated model, like River-Drain influencing the aquifer, reasons for waterlogging and drying out of wells and well design strategies.

In this report, groundwater quality scenarios of the worst affected region of Nargund-Navalgund area of Malaprabha command in Dharwar, Karnataka have been simulated through a three dimensional finite difference code SWIFT III. Mathematical modeling of the groundwater quality was done on a local rather than a larger regional scale.

My house is about 20 years old and is located in R T Nagar in Bangalore. In 1990, I had got a borewell dug. The Borewell is about 150 feet deep and has been giving me excellent quality water until about 2 years ago when I started noticing muddy water. The water that is pumped to an overhead tank contains fine particles of mud which tends to settle down in the overhead tank.

The report deals with water conservation measures in the arid and semi arid area of the hard rock region viz Somadevarahalli watershed (Bijapur taluka) and Herehalla watershed (Hangund taluka) of the Bijapur district of Karnataka. Soil and water, the most valuable natural resources for farming, are not preserved in-situ and conserved for future use owing to the inadequacies and ineffectiveness of the existing structures and measures. In view of this, to assess the overall situation of water resources for the development and management of watersheds, the annual and monthly rainfall and its distribution over the study area, and the status of groundwater occurrence has been analyzed.

The report presents a hydrogeological and geochemical study of groundwater flow for the Suddagedda basin of Andhra Pradesh. Planning of water resources development projects calls for an understanding and analysis of the hydrological characteristics of the region. The hydrogeology and geochemistry of the basin needs to be investigated particularly for a groundwater resources development project.

The report looks at groundwater quality and presents the results of the chemical analysis of groundwater samples from openwells & borewells of Belgaum district. The study broadly covers these aspects - (i) groundwater quality evaluation of the district (ii) identification of groundwater quality problems in various parts of district (iii) classification of groundwater, and (iv) application of DRASTIC model for assessing the vulnerability to groundwater pollution.

In the present study, surface and groundwater quality monitoring has been undertaken in parts of Udhampur district in Jammu and Kashmir in order to evaluate its quality for domestic and agricultural purposes. Water sources are polluted by four kinds of substances: traditional organic waste, waste generated from industrial processes, chemical agents of fertilizers & pesticides used for crop production and silt from degraded catchment.