畦灌施肥地表水流与非饱和土壤水流-溶质运移集成模拟Ⅱ:模型率定及验证  

Integrated simulation of surface-subsurface flow and solute transport for border strip fertigation Ⅱ.Model calibration and validation

作　　者：李志新[1,2] 许迪[1,2] 李益农[1,2] 章少辉[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

出　　处：《水利学报》2011年第2期143-151,共9页Journal of Hydraulic Engineering

基　　金：国家863计划重点项目课题(2006AA100210);中国水科院博士生学位论文创新研究课题

摘　　要：利用冬小麦扬花水畦灌施肥试验数据,对构建的畦灌施肥地表与非饱和土壤水流溶质运移集成模型进行率定,基于冬小麦返青水田间试验数据,对该集成模型在不同畦灌施肥模式下模拟的地表水流推进时间、沿畦长土壤体积含水率和硝态氮浓度、畦灌施肥系统性能评价指标值等进行验证。结果表明,模拟结果与田间实测数据的相对误差值和平均相对误差值均小于相应的控制误差,构建的集成模型可用于模拟预测不同畦灌施肥模式下地表和非饱和土壤水流溶质运移转化过程及分布状况,为开展畦灌施肥系统优化设计和性能评价提供了有效的数值模拟工具。The coupled surface and subsurface flow and solute transport model established by the authors was calibrated with the border strip fertigation experiment data during flowering period of winter wheat.The coupled model was validated by field experiment data obtained in reviving period of winter wheat including surface flow average advance time,soil moisture,concentration of soil NO3-1-N and degree of distribution uniformity of soil moisture and concentration of soil NO3-1-N.The results indicate that the relative error and average relative error between simulation and experiment results are within control deviation.The established coupled surface and subsurface flow and solute transport model can be used to simulate and predict the surface and subsurface flow and solute transport process as well as their distribution under different fertigation modes.It provides an effective simulation tool for design,management and evaluation of border strip fertigation system.

关 键 词：畦灌施肥 土壤水 溶质运移 集成模拟 率定 验证 

分 类 号：S275.3[农业科学—农业水土工程] S153.3[农业科学—农业工程]