灌区管理信息系统的数据库设计

讨论了灌区管理信息系统研制过程中数据库设计的阶段性。探讨了灌区信息数据库的概念结构设计和逻辑结构设计中的设计要点和注意事项。     

乐滩水库引水灌区北干渠能容渡槽结构计算研究

能容渡槽是乐滩水库引水灌区北干渠渠首关键建筑物,其特点是输水流量大,跨度大。论述了利用MIDAS有限元软件对渡槽进行结构静力分析,拟定预应力渡槽结构形式、预应力钢束布置及普通钢筋配筋,为工程施工图设计提供理论基础和设计依据。     

宁夏引黄灌区自动化测控设施应用效果分析

结合水利部农业水价改革试点项目,在宁夏沙坡头灌区选取典型项目区,对已砌护渠道、配套自动化控制闸门、量测水设施、信息传输系统及中央控制设备进行自动化测控设备的应用示范。结果表明:采用自动量控设备项目区可节水9%,农民水费支出减少7元/亩,全年减少人员工资开支10.24万元,增加工程维护费5.23万元,可消除水事纠纷的发生且水费及时足额收缴。     

BXXA型长效化学降阻剂的应用

本文根据江铜通信网降阻剂的应用，简要分析了ＢＸＸＡ型长效化学降阻剂的原理及施工方法。     

同江电排站配电系统的问题及处理措施

本文介绍了同江电排站配电系统的设计问题及处理措施,说明了电排站电动机辅助设备配电的重要性。     

地理信息系统在石津灌区现代化管理中的应用

通过对地理信息系统在石津灌区的应用，建立了系统的分层结构模型以及系统整体功能，其中，利用工具软件MapInfo6．5作为开发平台，以MapX4．5、Delphi6．0作为二次开发工具建立了一套完整的水情监控、渠道信息及配水管理系统，为灌区管理创造了良好的环境．     

Nitrate in the Water-Supply Wells in the Mancha Oriental Hydrogeological System (SE Spain)

This study determines the spatial and temporal distribution of nitrate content within the water-supply wells in the Mancha Oriental System (MOS) for the period 1998–2003 and presents an example of the multiple nitrate pollution sources in the El Salobral–Los Llanos Domain (SLD, southwestern Albacete). The groundwater resources of the MOS are used to maintain approximately 800 km² of irrigated crops and are the sole water supply for a total population of 275,000 inhabitants. The average nitrate content varies from <0.5 mg l^− 1 (detection limit) to 125 mg l^− 1. In some areas of the MOS statistical analyses show a growing tendency between 2001 and 2003. Nitrate content shows a heterogeneous spatial distribution but the highest levels can be associated with large areas of irrigated crops. However, there are also points in which nitrate has been detected in significant quantities which are not found to be spatially linked to this kind of crop. The presence of nitrate in these areas can be explained considering other sources of pollution, such us wastewater, or due to pollutant transport from contaminated areas through groundwater flow in a multiple-layered karstic aquifer. These results lead necessarily to reconsider the agricultural-derived nitrate as the sole source of pollution and to analyze the effectiveness of the current wastewater treatment practices from effluents in the MOS.     

羊泉截潜流灌区倒虹吸工程主要施工方法

结合工程实际情况,对羊泉灌区倒虹吸工程主要工序项目的施工方法进行细致安排优化改进,为工程的良好运行奠定了坚实的基础.     

卫宁灌区地下水动态规律及影响分析

灌区地下水观测研究的目的是为了掌握其变化规律,为农业生产及水资源开发利用提供技术支撑。本文从卫宁灌区的实际情况出发,通过多年观测资料,分析了地下水动态变化规律及主要影响因素,提出了建议。