不同灌排模式稻田地表排水水质评价TOPSIS法

TOPSIS on the Evaluation of Surface Drainage Water from Paddy Field under Different Irrigation and Drainage Modes

为了研究不同灌排模式对稻田地表排水水质的影响,通过两年的田间试验与采样分析,应用TOPSIS法,针对稻田排水中氨氮、全氮和全磷含量进行了水质分析评价。结果表明,控制灌排模式能够明显改善排水水质。控制灌排模式各次排水水质情况均优于常规灌排模式(CK)或与之持平,前期劣质排水先于CK好转,总体水质优于CK。

In order to evaluate the impact on surface drainage water quality of different irrigation and drainage modes, TOPSIS is used on NH^4＋ -N, TN and TP evaluation on drainage from field trials and sampling analysis of two years. Result shows that water-saving irrigation and controlled drainage mode can improve the water quality of drainage from paddy field greatly. Each drainage from the paddy field under water-saving irrigation and controlled drainage mode is better or equal to that from conventional irrigation and drainage mode, and the earlier stage poor drainage water is quicker to get better. The total water quality of drainage from the paddy field under water-saving irrigation and controlled drainage mode is better than that from conventional irrigation and drainage mode.