摘要
地下滴灌是一种新型高效节水灌溉技术。为探究土壤空间变异性对地下滴灌毛管水力特性的影响,提出地下滴灌毛管水力要素的试验方案,研究土壤物理参数(土壤初始含水率和土壤黏粒含量)的空间分布特征,分析土壤物理参数的空间分布格局。建立考虑土壤物理参数空间变异性的地下滴灌毛管水力计算模型,将其转化为目标函数的优化问题,采用遗传算法来求解模型中的相关参数。根据试验数据和模型计算结果验证模型的可靠性。该模型为研究土壤空间变异性和地下滴灌毛管水力特性的内在联系奠定基础。
Subsurface drip irrigation （SDI） is a new water-saving irrigation technique. Test scheme of hydraulic elements of lateral of SDI isproposed, and research is done on the spatial physical distribution feature of soil physical parameters （soil initial moisture content and soilclay content） , and the spatial distribution patterns of the soil physical parameters is analyzed to explore the effects of soil spatial variability onhydraulic characteristics of lateral of SDI. On this basis, hydraulic calculation model of laterals of SDI considering soil spatial variability is es-tablished. The model is transformed into optimization problem of objective function, and genetic algorithm is used to solve revant parameters.Comparing the test data with the calculation results, it indicates that the model has high accuracy. The model lays the foundation for the innerlink between soil spatial variability and hydraulic characteristics of lateral of SDI.
出处
《中国农村水利水电》
北大核心
2016年第12期19-23,共5页
China Rural Water and Hydropower
基金
国家自然科学基金资助项目(50979089)
关键词
地下滴灌
毛管
土壤初始含水率
土壤黏粒含量
遗传算法
subsurface drip irrigation
lateral
soil initial moisture content
soil clay content
genetic algorithm
