摘要
针对灌区目前缺少适用于面广量大的斗、农渠,以及适合大面积推广应用的量水方法等问题,提出一种基于细长板开启角与明渠流量关系的量水方法.通过试验可知:细长板开启角度、明渠非均匀流流量与板前水深三者单值对应,并满足二元函数的变化关系.在确定渠断面、细长板尺寸以及安装布置条件下,只要准确测得细长板开启角与板前水深,便可利用等流量线图得知此时的流量.用该法测得的流量值与实际流量相比较,相对误差在±5%以内.
In consideration of the fact that there lacks a reasonable method suitable for wide application in flux measurement for considerable lateral canals and ditches, a new method based on the relationship between the opening angle of long and narrow plate and flux of open channel is put forward. Experimental result shows that the non-uniform flux of open channel is single-valued corresponding to the opening angle of the plate and water depth in front of the plate, and satisfies the dualistic function. Therefore, under the certain condition of the profile of open channel, the size of long and narrow plate and installation, the flux can be achieved from the equal flux curve if the opening angle of the plate and water depth in front of the plate are accurately determined. In comparison with the real value of flux, the relative error of the measured data by the method is within ± 5 %.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第5期534-536,共3页
Journal of Hohai University(Natural Sciences)
关键词
节水农业
灌区量水
单值对应
二元函数
water-saving agriculture
water measurement for irrigated area
single-valued correspondence
dualistic function
