一、问题的提出与意义本论文的任务是研究当缺乏实測流量但有观测的水位和其他年份的洪水繩套或該年用实测流量已闡明的第二支綫时,來繪制(借計算法)理論上的繩套形流量曲綫(“洪水繩套”)或曲綫的單一支綫的这种可能性。在各种場合的实际工作中,的确常常可能遇見这样的問題。例如,有时只有洪水落水支綫有实测流量闡明,而漲水支綫完全沒有闡明或僅最上部有闡明,这种情况在实际中是很常見的,这 I. PROBLEMS AND IMPLICATIONS The purpose of this paper is to study the effects of floods on observed water levels and other years of flood cages or the second leg of the year that has been established with measured flows ) The possibility of a theoretical rope-sleeve flow curve (“flood jacketed”) or a single spur of a curve. It is true that such problems are often encountered in the actual work on all occasions. For example, it is common in practice to sometimes find out if there is a measured flow rate for a flood and descending branch of water, and if there is no clarification of the flood or just the uppermost part