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WST 601 CROP WATER REQUIREMENT & IRRIGATION PLANNING                                                                               (2L+1P) III

Objective
This course is imperatively needed for effective planning of water utilization in crop production.

Theory

UNIT I
Introduction to the course, land use capability and soil and land irrigability assessment, concepts of crop water requirements, irrigation planning and irrigation scheduling, irrigation planning factors, factors affecting irrigation water requirement

UNIT II
Introduction to Methods of estimation of reference evapo-transpiration, crop response function

UNIT III
Estimation procedure of ET (both reference and actual), water availability and its significance in irrigation management, various methods of estimation of reference evapo- transportation and crop consumptive use.

UNIT IV
Concept of field water balance, various components of field water balance their estimation, both by analytical and empirical methods.

UNIT V
Application of concepts of cropping pattern and cropping intensity, crop planning in relation to changing scenario of input availability, crop response function to irrigation, irrigation scheduling to crops and irrigation methods.

UNIT VI
Estimation of seasonal and annual water requirement of various field crops, progressive peak and seasonal consumptive water use and their significance in operation of irrigation projects, application of simulation model for irrigation planning and scheduling.

Practicals
Irrigation scheduling criteria, estimation of crop water requirement, crop water use efficiency, irrigation water use efficiency. Estimation of evapo-transpiration (reference and actual by field technique for a specific period). Procedure for estimation of actual crop evapo-transpiration of different crops using the concept of trickle methods of irrigation. Application of Irrigation scheduling information system-computer model in irrigation planning and scheduling with some case study. Application of CROPWAT.

Suggested Readings