Projection pursuit model for comprehensive evaluation of agricultural irrigation water quality

In order to solve the problems of incompatibility of evaluation results and the difficulty to reflect the real water quality property of comprehensive evaluation of agricultural irrigation water quality, a new comprehensive evaluation method-projection pursuit model based on the technology of data exploring, which was optimized by the immune genetic algorithm(IGA-PP), was presented to evaluate irrigation water quality. The result shows that, compared with the traditional water quality evaluation methods, the mathematical concept of IGA-PP method is much simpler and clearer. The evaluation results of IGA-PP are more precise and reasonable, which solve the incompatibility and unilateral problem of comprehensive evaluation. IGA-PP has better applicability for forecasting and evaluating agricultural engineering system.