河套地区畦灌灌水技术要素优化与激光平地效果分析word格式论文.docxVIP

目录1引言................................................................11.1研究背景和意义..................................................11.2国内外研究进展..................................................11.2.1土壤入渗参数及田面糙率系数的确定...............................11.2.2地面灌溉地表水流运动模型的研究进展.............................21.2.3地面灌溉土壤入渗模型的研究进展.................................41.2.4激光平地技术的研究进展.........................................51.3论文研究内容与技术路线..........................................51.3.1研究目标.......................................................51.3.2研究内容.......................................................61.3.3技术路线.......................................................72试验区概况与试验设计................................................82.1试验区概况......................................................82.2观测内容与方法..................................................92.2.1入畦流量测定...................................................92.2.2水流推进、消退过程测定.........................................92.2.3土壤水分测定...................................................92.3试验设计........................................................92.3.1玉米和葵花畦田灌水试验.........................................92.3.2畦田秋浇灌水试验..............................................113畦田土壤入渗参数研究...............................................133.1土壤入渗参数估算模型...........................................133.1.1水量平衡方程式................................................133.1.2改进Maheshwari模型153.1.3非线性回归模型................................................163.1.4WinSRFR3.1模型173.2灌水试验估算结果分析...........................................193.2.1玉米、葵花畦田处理结果与分析..................................193.2.2畦田秋浇试验处理与结果分析....................................273.3 小结............................................................294畦田灌溉灌水质量评价...............................................304.1灌水质量评价指标...............................................304.2畦田灌水质量评价结果...........................................314.2.1田间实测法....................................................31WinSRFR模型314.2.3试验灌水质量评价结果.