長江下游每到汛期,河面寬廣而且水深流急,施測一次流量少則8～9小时,多則一天,山溪性河流每遇洪峰一般也需要3～4小时左右,不但增加了劳动时間,而且也降低了成果質量,因此测流时間过長是目前測站普遍存在的一个問題。过去我們虽然已經認識到縮短測流歷时就是提高了 Each flood season in the lower reaches of the Yangtze River, the river is broad and the water depth and urgency, measuring a flow rate of at least 8 to 9 hours, as many as one day, mountain torrent every encounter flood peak generally takes about 3 to 4 hours, not only increased labor time , But also reduces the quality of the results. Therefore, it is a ubiquitous problem in current stations to measure the flow time. In the past, although we have realized that shortening the flow measurement time is increased