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一、間题的提出受冲淤影响的水文測騐河段上,在中低水时期,河槽往往只在河底部分不断发生冲淤变化。河床兩岸部分的冲淤,此較是不显著的。这样的河道多半为槽形,并且具有下列特点: 1.河底高程呈連續性的变化; 2.沿河流縱断面的冲淤是局部性的; 3.由于冲淤的局部性,造成河底坡降和水面此降較大的变化; 4.随着冲淤現象的交替,河床組成不断变化,而
I. PROBLEM PROBLEMS During the period of low and medium water periods, hydrological test sections affected by deposition and deposition often experienced erosion and silting changes only in the bottom of the river. Erosion and deposition on both sides of the riverbed, this comparison is not significant. Most of these rivers are trough-shaped and have the following characteristics: 1. The river bottom elevation changes continuously; 2. The erosion and deposition along the longitudinal section of the river is localized; 3. The erosion of the river Bottom slope down and the surface of the water drop larger changes; 4. With the alternating scour and silting changes in the composition of the river constantly changing, and