摘要
本文从ＰａｌｎａｒｄＣｏｎｓｉｄｅ［１９５４］提出的岸线演化方程出发，提出在沿岸流作用下，海湾岸线的不冲不淤点位置与海湾形态的对称性、外海破波角和输沙率有关。海湾不冲不淤点随时间向湾外迁移，曲折岸线的不冲不淤点位于它的中心，位置稳定。对于受弱沿岸流作用的河口，文章证明，它在口门一段的形态呈高斯误差曲线形式，不冲不移点位于即；并利用飞云江的岸线资料论证了文章的解析结论。
Abstract Under long-term action of alongshore drift，the statistical sediment movement on a coastis proved to be a linear diffusional process. An evolution equation of the coastal line can bedenoted bywhere x，y are illustrated in Fig. 1，respectey， a is a parameter dependent on the sea coast，t is time.Ffom（1），we have concluded the equilibrium points of erosion and deposition whith arelocated onwhere x_0 is the location of the equilbrium points，θ is called bay unsymmetrical parameter in-dependent of x，y，t，it can be estimated by using the historical data. Similarly，the equilibriumpoints of tortuous coast has proved to be located on its center.It is concluded that an estuary contour would be appronmate to Gaussion curve，i．e.where A is the area of the estuary. Its equilibrium points are located on and have the follwing properties when：the river channel will silt；otherwise the channel will be eroded.
出处
《地理研究》
CSSCI
CSCD
北大核心
1994年第4期105-111,共7页
Geographical Research
基金
国家自然科学基金
