ABSTRACT
Comprehensive knowledge about the water flow paths, operation and maintenance, irrigation service, unit service areas and demand for operation is a crucial input to the formulation of appropriate and workable plans for irrigation system modernisation. Characterization of the water network, system operation, maintenance and management and irrigation service in the context of identifying potential improvements of present and possible future scenarios necessitated analyses of considerable system-specific data and information. This chapter aims at applying its analytical concepts and tools while crafting appropriate adaptive-modifications to suit the case of small-scale national irrigation systems in the Philippines. The geographic locations of the irrigation network and developed drains are quite well known to systems operators and farmers. The service area of Balanac River Irrigation System is partitioned into turnout service areas based on hydraulic boundaries. Downstream farmers stated that unequal access to irrigation water was attributed to poor flow control and laissez faire cropping and irrigation offtaking.
