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WST 607 ENVIRONMENTAL IMPACT ASSESSMENT OF IRRIGATION PROJECTS                                                           (3L+0P) III

Objective
To get the students acquainted with the environmental impact of water resource storage facilities and their assessment, regulation, operation and maintenance through various tools, models and techniques.

Theory

UNIT I
Introduction to the concept of EIA; Environmental impact of dams and reservoirs for irrigation water supply. Environment Impact Assessment (EIA) protocols, guidelines, regulation and policies for construction of dams and reservoirs in India. Case studies of use of EIA in addressing the impact of irrigated agricultural environment and rural development activities in India.

UNIT II
Agricultural nonpoint sources of  pollution, process of  salinization and desalinization, land reclamation measures, land remediation through subsurface drainage technology, leaching of nitrate and phosphorous beyond crop root zone, Indicators of biological health of the soil, final assessment of the irrigable class of the land for sustainable use.

UNIT III
Use of geospatial tools viz. GIS,RS, AND GPS and modeling techniques for impact assessment of irrigation projects. Assessment of surface runoff, pollutant load and sediment yield from reservoir catchments and quality regulations. Impact of agricultural practices on surface and ground water pollution in the catchment area. Preparation of digital data base of the irrigated canal commands. Use of geostatistical techniques for generation of spatio-temporal variability maps and delineation of vulnerable zones as per EIA guidelines. Preparation of EIA reports on irrigation and water resources projects.

UNIT IV
Social benefit-cost analysis of  environmental impact of  irrigation projects. Rationale and significance. Objective and measures of benefits – aggregate consumption, income redistribution, self reliance and merit wants. Direct and indirect benefits and costs and their measurement. EIA under risk and uncertainty.

Suggested Readings