浮标法在測驗洪水中仍然是一种不可缺少的方法,尤其是山溪性河流上应用机遇更多。1958年,龙門鎮水文站創制成了自由式浮标投擲器,1961年經澗北水文站作了某些改进,經过实用,証明有如下优点:1.不用另外再加设主索,只利用循环索就能投放浮标;2.所需投放的浮标,一次就能挂足投完,不用再絞回来另挂;3.能将浮标投到任何需要投放的位 The buoy method is still an indispensable method in the flood test, especially for the mountain streams. In 1958, the Longmen Hydrological Station was created as a free-style buoy thrower. Some improvements were made to the Jianbei Hydrometry Station in 1961. After practical application, it proved to have the following advantages: 1. Without additional main cables, Only the use of circular rope can be put buoys; 2 buoys need to put one can hang enough to vote, do not have to twist back to hang; 3 buoys can be cast to any need to put a bit