India

The report gives a reviewed summary of various developments in the field of artificial recharge of groundwater at national and international levels. Different methods of recharging have been discussed in detail with reference to their design criteria, application and economic feasibility. The report also provides the details of field application.

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.

The study attempts to develop an in-depth understanding of the behavior of open wells in the region through sensitivity analysis of the aquifer parameters and its method of pumping test design. The estimation of groundwater balance and flow paths requires appropriate aquifer parameters, representing the study domain.

WASSAN (Watershed Support Services and Activities Network)

Location:         Hyderabad, Andhra Pradesh
Last Date:                15^th July 2010

Sustainability – this word has assumed tremendous importance today, in the context of “development”. The advancement of human civilization in terms of technology, economics and life-style is turning out to be lop-sided. It is being realized that the sheer amount of wastes generated by the present population, is becoming more and more unmanageable with each passing day.

The study attempts to compile and evaluate the status of metal pollution assessment through aquatic sediments in rivers and lakes. The introduction of metallic pollutants into a river, whether it is natural (erosion from its drainage basin) or artificial (anthropogenic), can occur in dissolved or particulate form.

In this report, a conceptual model is proposed and described for calculation of streamflow runoff arising from rainfall, snowmelt and glacier melt for the Himalayan basins.  The simple structure of the model is designed keeping in view the sparse network, the availability of data and topography of the Himalayan basins. The model is based on the area-elevation characteristics of the watershed and utilizes the relationships describing the temperature lapse rates and orographic precipitation distribution.

The methods of pump test analysis reviewed in this report has been classified as traditional, computer based and new graphical. Quantitative data on hydraulic characteristics of aquifers including transmissivity and storativity are essential to the understanding and solution of aquifer problems and the proper evaluation and utilization of groundwater resources.

The report is an attempt to compile the procedures for systematic processing of rainfall data. The concepts of rainfall data processing have been discussed. It provides computer programs that are meant for processing and analysis of rainfall data collected from various sources. Different well documented computer programs, their description with input specifications and test input are given in the report.

The study looks at soil moisture movement and recharge to groundwater using nuclear methods like tritium tagging. It estimates the recharge to groundwater due to monsoon rain and irrigation through the unsaturated porous media in case of cultivated and uncultivated fields.