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甘肃中部干旱地区共十六个县,是甘肃省农业生产最困难的地区。五十年代初期就以锅驼机、柴油机为动力发展提水灌溉,后来随着刘家峡、盐锅峡、八盘峡大中型水电站的相继建成,提水灌溉工程就广泛地以电做为动力,目前已建成千亩以上电力提灌工程118处,装机容量34万瓩,设计灌溉面积155.3万亩。其中万亩以上的19处,设计灌溉面积130.8万亩,实灌64.2万亩,年用电量3.34亿度。为了研究高扬程电力提灌工程的经济效益,甘肃省对该类工程进行了广泛的实际调查,在取得大量材料的基础上,从社会投资利润率(即投资效果系数),国家投资抵偿年限,电灌站收支平衡和社员吃粮花钱水平四个方面做了些经济分析工作,证明这些工程对于解决甘肃黄土高原干旱地区的农田灌溉和山区人畜用水起了显著的作用。高扬程多级提水的电灌在工程技术上是可行的,效益是显著的,在特定的条件下,也是经济合理的。
A total of 16 counties in the arid region of central Gansu Province are the most difficult agricultural production areas in Gansu. In the early 1950s, the development of water-pumping irrigation was carried out by using pot-hunting and diesel-powered engines. Later, with the construction of large and medium-sized hydropower stations in Liujiaxia, Yanghuoxia and Bapanxia, water diversion and irrigation projects were widely powered by electricity. Up to now, 118 power lifting projects have been completed, with an installed capacity of 340,000 tons and an irrigation area of 1,553,000 mu. Among them, 19 are above 10,000 mu, with an designed irrigation area of 1,380,000 mu and a real irrigation capacity of 642,000 mu and an annual electricity consumption of 334 million degrees. In order to study the economic benefits of high-lift power lift irrigation projects, Gansu Province conducted a wide range of actual investigations on such projects. On the basis of obtaining a large amount of materials, from the perspective of social investment profit rate (ie investment effect coefficient), national investment compensation period, Station balance of payments and members eat grain level four levels of economic analysis done to prove that these projects to solve the Gansu Loess Plateau arid areas of farmland irrigation and mountain water for human and livestock played a significant role. High-lift multi-stage electric water pumping in engineering and technology is feasible, the benefits are significant, under certain conditions, is also economical and reasonable.