Abstract
Development of an irrigation project requires preparation of a detailed project report (DPR), involving multidisciplinary treatment ranging from hydrological investigation to various surveys not limited to topographical, geophysical, geotechnical, and environmental, along with financial appraisal. The DPR preparation involves huge investments; therefore before going ahead into a detailed investigation, it would be more practical to have a detailed preliminary investigation for planning of the irrigation project. This chapter discusses the extent of investigation including data requirements and processes for both the planning stage (i.e., preliminary investigation or prefeasibility report) and the detailed investigation stage (i.e., DPR stage), followed by a description of the factors affecting the development of irrigation facilities.
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