灌溉回归水,指稻田流经地表和地下进入排水沟最终回到河流中去的水。这里研究的对象,是指未回入河流之前灌区内部从排水沟直接引用的水。回归水利用是灌溉水的重复利用。营口地区位于渤海湾辽河三角洲下梢,由于缺少淡水源,每年在辽河枯水期提引大量回归水进入灌溉 Irrigated return water refers to the water that the rice fields flow through the surface and underground into the drains and eventually back to the river. The object of study here is the water that is directly quoted from the gutter within the irrigated area before returning to the river. Return to water use is the reuse of irrigation water. Yingkou is located in the lower reaches of the Liaohe River Delta in the Bohai Bay. Due to the lack of fresh water, a large amount of return water is introduced into the Liaohe River during the dry season