潼三河段主槽断面间距变化对淤积量的影响
发布时间：2019-03-06 19:55
【摘要】：潼三河段采用主河槽断面间距和滩间距计算库容和淤积量,受河道形态变化、水库低水位运行和治黄工程修建等影响,原有部分淤积测验断面已经失去控制主河槽的代表性,淤积测验断面间距发生变化,沿用的固定主河槽断面间距影响库容及淤积量的计算精度。分析了潼三河段沿用主河槽断面间距计算淤积量存在的问题,采用断面线中点连接法、断面两侧边线平均法量算主河槽断面间距,并进行淤积量计算,分析断面间距变化对淤积量计算精度的影响,结果表明:在计算模型和方法不变的情况下,只考虑主河槽断面间距因素,用新主河槽断面间距计算出的淤积量较用原间距计算结果均增大,说明一直沿用的主河槽断面间距影响淤积量计算的准确性;河段总间距增大,淤积量也增大,淤积量与断面间距成正比关系。
[Abstract]:The section spacing of the main channel and the beach spacing are used to calculate the reservoir capacity and siltation amount in the third reach of Tong River. Affected by the change of the channel shape, the operation of the reservoir low water level and the construction of the Yellow River treatment Project, some of the original siltation test sections have lost the representativeness of controlling the main channel. The cross-section spacing of siltation test changes, and the fixed channel cross-section spacing affects the calculation accuracy of reservoir capacity and siltation amount. This paper analyzes on the problems existing in the calculation of siltation amount by using the section spacing of the main channel in the third reach of the Tong River. The middle point connection method of the section line and the average method of the side lines on both sides of the section are used to calculate the cross section spacing of the main channel, and the sediment amount is calculated. The influence of the change of cross-section spacing on the calculation accuracy of sediment volume is analyzed. The results show that under the condition of constant calculation model and method, only the factor of cross-section spacing of the main channel is considered. The sediment volume calculated with the new channel cross-section spacing is larger than that calculated with the original channel spacing, which shows that the main channel cross-section spacing has an effect on the accuracy of the calculation of the sediment volume. The total interval of the reach increases, and the amount of siltation increases, which is proportional to the spacing of the cross-section.
【作者单位】： 黄河水利委员会三门峡库区水文水资源局;三门峡黄河明珠(集团)有限公司;
【分类号】：TV147
[Abstract]:The section spacing of the main channel and the beach spacing are used to calculate the reservoir capacity and siltation amount in the third reach of Tong River. Affected by the change of the channel shape, the operation of the reservoir low water level and the construction of the Yellow River treatment Project, some of the original siltation test sections have lost the representativeness of controlling the main channel. The cross-section spacing of siltation test changes, and the fixed channel cross-section spacing affects the calculation accuracy of reservoir capacity and siltation amount. This paper analyzes on the problems existing in the calculation of siltation amount by using the section spacing of the main channel in the third reach of the Tong River. The middle point connection method of the section line and the average method of the side lines on both sides of the section are used to calculate the cross section spacing of the main channel, and the sediment amount is calculated. The influence of the change of cross-section spacing on the calculation accuracy of sediment volume is analyzed. The results show that under the condition of constant calculation model and method, only the factor of cross-section spacing of the main channel is considered. The sediment volume calculated with the new channel cross-section spacing is larger than that calculated with the original channel spacing, which shows that the main channel cross-section spacing has an effect on the accuracy of the calculation of the sediment volume. The total interval of the reach increases, and the amount of siltation increases, which is proportional to the spacing of the cross-section.
【作者单位】： 黄河水利委员会三门峡库区水文水资源局;三门峡黄河明珠(集团)有限公司;
【分类号】：TV147
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