毕业设计--乡镇农田水利工程设计.docxVIP

平江县大坪乡、虹桥镇等两个乡镇农田水利工程设计目录1前言21.1设计的必要性21.2设计目标21.3国内外农田节水灌溉现状22综合说明42.1灌区概况42.2自然条件42.2.1地形地貌42.2.2气象42.2.3土壤42.2.4植被42.2.5水文与水文地质42.2.6工程地质52.3灌区存在问题53项目区水资源供需平衡分析53.1灌溉水源53.2供水量分析53.2.1大坪乡灌区63.2.2虹桥镇灌区63.3灌溉需水量预测73.4水资源供需平衡分析83.4.1原则与方法83.4.2水资源平衡计算84灌溉与排水工程设计94.1灌溉渠道94.2排水工程设计154.2.1排涝标准154.2.2排涝流量的设计计算155结论16参考文献17致谢18附录18乡镇农田水利工程设计摘要：本设计为灌溉与排水工程设计，本文主要是对湖南省平江县大坪乡、虹桥镇灌区渠道灌溉改造，通过对灌区的分析供水量和预测需水量，最后进行供水需水平衡分析，了解区内斗级渠道与灌排渠道采用续灌的灌溉方式，农级渠道采用轮灌方式。设计渠道与排水道纵断面，纵断面设计应根据沿沟的地形条件，排水沟水位推算结果和横断面设计成果，进行水位衔接，保证沿程排水畅通，并在此基础上绘制排水沟道的纵断面图。关键词：渠道灌溉；水力计算；水平衡分析；节水建筑物The Design of Water Conservancy and IrrigationProjects in Two Towns, such as DapingTownship and HongqiaoTown, PingjiangCounty(Orient Science Technology College of Hunan Agricultural University, Changsha 410128, China)Abstract:This design is mainly for irrigation and drainage engineering design, this paper is mainly in Pingjiang County, Hunan Province Daping Township, Hongqiao Town irrigation channel irrigation transformation, through the analysis of water supply and forecast water demand, and finally water supply and water balance analysis, to understand the area Bucket-level channels and irrigation and drainage channels using continued irrigation irrigation methods, agricultural-grade channels using wheel irrigation. Design channel and drainage channel longitudinal section, longitudinal profile design should be based on the terrain along the ditch conditions, drains water level calculation results and cross-sectional design results, the water level convergence, to ensure smooth drainage along the way, and on this basis to draw the drainage channel Profile view.Keywords:Canal irrigation；hydraulic calculation；Water balance analysis；Water-saving construction1 前言1.1设计的必要性平江县大坪乡、虹桥镇灌区肩负着湖南省平江范围内的农田灌溉及抗旱任务。为灌区内的人民的粮食生产提供了坚实的后盾，促进了全国灌区农业高产化的稳定发展，对灌区的经济，社会发展等产生了重要的影响。项目区以优质稻种植为优势，生产方法“公司+基地+农户”被建立，那么为农村土地流转的新局面做了贡献，也给为那些参与土地流转的农民带来了直接的经济效益和就业方向。这个区域的土地整治将采用区域化的管理，采用种植分区，与之前的土地整治的目标相同，加大进步速度，促进中国农业化的新时代发展，实现规模效益。1.2 设计目标根据灌区自然、经