共查询到20条相似文献,搜索用时 31 毫秒
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井渠结合灌区用水预报研究 总被引:1,自引:0,他引:1
通过对黄河下游井结合灌区用水现状的分析,以作物腾发量预测计算为基础,按作物根系呈水量平衡原理,建立了井渠渠结合灌区用水预报模型,并利用该模型对人民胜利渠灌区的用水进行了分析预报。实例计算结果表明,该模型不仅计算结果合理,而且能够根据当时当地的天气和作物生长特生预报各种作物的灌溉水量,灌水时间等,可以提高灌区管理部门的工作效率和管理水平,达到节水灌溉的目的。 相似文献
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内蒙古河套灌区用水试验及结果应用 总被引:2,自引:0,他引:2
孙洪保 《甘肃水利水电技术》2001,37(4):277-279
通过用水灌溉试验,推得试验区灌溉定额、灌区咽归系数及灌区有效用水系数。河套灌区回归水量少,灌区利用黄河水的效率很高。所用灌溉定额经套种、复种指数修正后,推估出内蒙古河套灌区耗用的黄河水量与实际耗用黄河水量相近,说明试验结果具有一定的可靠性和适用性。 相似文献
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黄河桃汛洪水预报模型 总被引:1,自引:0,他引:1
根据桃汛形成的主要机理以及河道冰情的演变规律,系统地论述了黄河桃汛的生消演变过程及影响因素,建立了桃汛期的水量预报模型。该模型可直接为三门峡水库调度及黄河下游的春灌用水服务。 相似文献
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高效节水灌溉技术--地下滴灌 总被引:4,自引:0,他引:4
地下滴灌是在滴溉技术日益完善的基础上发展而成的一种新型高效节水灌溉技术,已经成为世界各国研究和应用的热点。文中对地下滴灌的技术设备、技术特点、效益分析进行了综述,以促进我国推广应用地下滴灌技术。 相似文献
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This paper provides an overview of the main features of irrigation in Japan, and the issues it raises, rather than an exhaustive survey of the subject. The authors’ remarks concentrate on irrigation for rice cultivation, since irrigation for non‐paddy crops is not widely developed and claims a very minor share of the country's water resources. The main components of the water requirements of rice irrigation are identified, and then the composition and functions of farmers’ irrigation associations, or more correctly ‘land improvement districts’, are described. 相似文献
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Abstract Beginning in 1995, the Mexican Federal Government started a national program for promoting increase in agricultural productivity in the irrigation districts of Mexico. The program, Alianza para el Campo (Alliance for Agriculture) involves strategies for achieving the objective among which highlight a subprogram called Water Use Efficiency and Chemigation. The new law of rural development also includes actions towards the preservation of natural resources. The National Institute for Forestry Agricultural and Livestock Research of Mexico (INIFAP) is in charge of generate and transferring the research and technology in these programs as part o a national strategy to implement irrigation modules in several different ecological systems from the dry regions of North Mexico to tropical regions in the southwest. This paper describes the status and strategies for promoting irrigation efficiency in irrigation districts of Mexico. 相似文献
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迎门山灌区因地制宜,采用多种节水灌溉工程措施,解决了灌区水资源紧缺问题,为灌溉农业的发展创造了条件,使灌区的农业发展有了保障,是灌区节水灌溉应该提倡和推广的。 相似文献
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随着农业种植结构的调整和水利工程管理体制的改革,甘肃省疏勒河流域灌区围绕改善农业生产基本条件、调整农业结构、减轻农民负担、增加农民收入的目标,进行了灌区管理机制的改革,积极推广农民用水户参与式灌溉管理.通过3年的实践,健全了协会的管理职能,明确了协会和用水户的责任、权利、义务,避免了搭车收费现象,促进了节约用水. 相似文献
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Water Resources Management - Aiming at revealing the nonlinear relations between rainfall, crop water requirement and irrigation water in the irrigation district, and improving the accuracy of... 相似文献