许多发达国家曾一度把节水研究的注意力几乎全部集中于喷、滴灌技术。但随着能源的日益紧缺，人们又重新重视对常规灌水方法的改进与发展，并创造出许多全新的方法。1．波涌灌溉法。这是美国70年代推出的一种灌水方法，即采用加水大流量的办法把水灌到部分沟长时暂停供水，稍过 Many developed countries once focused their attention on water-saving research to spraying and drip-irrigation technologies. However, with the increasing shortage of energy, people have re-emphasized the improvement and development of conventional irrigation methods and created many new methods. 1. Surge irrigation method. This is the United States introduced a method of irrigation in the 1970s, that is, the use of large flow of water to the water irrigation part of the ditch for a long time to suspend water supply,