论文部分内容阅读
绪論近年來在許多河流上都進行了懸移質測量。根据这些資料,可以估計流域的輸沙率。像这样所得到的泥沙输移率代表着來自各部分的泥沙量的一个集体平均值,至于每一部分究竟產生多少泥沙我們还不知道。在不同的流域里,由于水流、地势、土壤和土地使用情况的不同,輸沙率也不一样。相类似的相关关系也可能存在在同一流域的各个不同部分里。本文的目的是要提供有关于輸沙率和水流、土壤、地势及土地使用情况这几个流域因素间的相关关系的一个研究成果。这些相关关系可以用以估計流域因素不尽相同的流域各部份的產沙量。研究的所在地在奥里岡州西部从加利福尼亞州边境一直到哥偷此亞河的山区及河谷流域。在这个区域內,二十九条河上有过一年到三年的縣移質測量紀錄。在業经發表的文献中可以找到关于水流、
Introduction In recent years, suspended sediment measurements have been conducted on many rivers. Based on these data, it is possible to estimate the sediment transport rate in the basin. The rate of sediment transport thus obtained represents a collective average of the amount of sediment from each part, and we do not yet know exactly how much sediment each part produces. In different basins, the rate of sediment transport is also different due to different flows, topography, soil and land use. Similar relationships may also exist in different parts of the same basin. The purpose of this paper is to provide a study on the correlation between the rates of sediment transport and the factors affecting water flow, soil, topography and land use. These correlations can be used to estimate the sediment yield of various parts of the basin where the river basin factors are not the same. The study was conducted in western Oregon from the California border to the mountains and valleys of Columbia. In this area, there are records of county-level transfer surveys of 29 rivers on the river between one and three years. Published literature can be found in the literature on water flow,