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我们进行灌水,一般要看天、看地、看庄稼。这也就是说作物需水情况是随着灌区气象情况、土壤水分状况以及作物生长发育阶段而变化。因此各级灌溉渠道所通过的流量,应根据灌区用水需要随着时间而不同。灌溉渠道设计流量的大小,一般同渠道所控制的灌溉面积的大小,田间作物类别与其种植面积,以及作物的灌溉制度等有关。因此在计算渠道流量时必须首先掌握这些资料。
We carry out irrigation, the general depends on the weather, look at, see crops. This means that crop water demand changes with the meteorological situation in irrigation areas, soil moisture status and crop growth and development stage. Therefore, the flow rate of irrigation channels at all levels should be different according to the needs of irrigation water use over time. The size of the design of irrigation channels is generally related to the size of the irrigated area controlled by the channel, the type of field crops and their planting area, and the crop irrigation system. Therefore, in the calculation of channel traffic must first grasp the information.