基于模糊模式识别的农田排水再利用适宜性评价  

Assessment of suitability of farmland drainage water reuse based on fuzzy pattern recognition

作　　者：王少丽[1,2] 刘大刚 许迪[1,2] 陈皓锐[1,2] 

机构地区：[1]中国水利水电科学研究院水利研究所,北京100048 [2]国家节水灌溉北京工程技术研究中心,北京100048 [3]湖南省水利水电勘测设计研究总院,湖南长沙410007

出　　处：《排灌机械工程学报》2015年第3期239-245,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51279212);"十二五"国家科技支撑计划重点项目(2012BAD08B00);水利部公益行业科研专项(201401007)

摘　　要：以受盐渍化威胁的干旱半干旱地区为研究对象,基于构建的农田排水再利用适宜性评价指标体系,采用模糊模式识别方法建立了农田排水再利用适宜性评价模型;综合分析相关文献和已有标准,制定出评价指标体系各项指标的分级标准值范围和标准值,采用层次分析法确定各评价指标的权重.以宁夏银北灌区5个典型排水再利用区域为例的评价结果表明,除前进农场外,其他区域评价等级均在2级"适宜"排水再利用范围内.其中灌溉中、后期利用排水灌溉的适宜性级别特征值低于前期,即排水再利用的适宜程度好于前期,该时期正是作物需水量较大和灌溉用水紧张期,处于作物盐分非敏感期,适宜地再利用一定量的农田排水是可行的.An index system is put forward to evaluate the reuse suitability of farmland drainage water in arid and semi-arid regions threatened by salinization based on fuzzy pattern recognition model. For each index, the range of standard value for every classification is specified by analyzing the relevant li- terature and existing technical standards comprehensively. The weight of each index is determined by making use of the analytic hierarchy process （AHP）. The index system is applied to assess the reuse suitability of drainage water in five typical farmlands in Yinbei Irrigation District, Ningxia. It is shown that except Qianjin farmland the water reuse suitability in the rest farmland is all at the second grade. Particularly, the index values in the middle and late periods of irrigation are less than those in the early period of irrigation, suggesting the water reuse suitability is better than in the middle and late oeriods.In the middle and late periods, crops need more irrigation but fresh water is in shortage; further the crops are not sensitive to salt. Thus it is feasible to reuse a certain amount of drainage water for irrigation in those periods.

关 键 词：农田排水再利用 指标体系 模糊模式识别 灌溉 适宜性评价 

分 类 号：S276[农业科学—农业水土工程]