發(fā)布時間：2019-03-06 19:55

【摘要】：潼三河段采用主河槽斷面間距和灘間距計(jì)算庫容和淤積量,受河道形態(tài)變化、水庫低水位運(yùn)行和治黃工程修建等影響,原有部分淤積測驗(yàn)斷面已經(jīng)失去控制主河槽的代表性,淤積測驗(yàn)斷面間距發(fā)生變化,沿用的固定主河槽斷面間距影響庫容及淤積量的計(jì)算精度。分析了潼三河段沿用主河槽斷面間距計(jì)算淤積量存在的問題,采用斷面線中點(diǎn)連接法、斷面兩側(cè)邊線平均法量算主河槽斷面間距,并進(jìn)行淤積量計(jì)算,分析斷面間距變化對淤積量計(jì)算精度的影響,結(jié)果表明:在計(jì)算模型和方法不變的情況下,只考慮主河槽斷面間距因素,用新主河槽斷面間距計(jì)算出的淤積量較用原間距計(jì)算結(jié)果均增大,說明一直沿用的主河槽斷面間距影響淤積量計(jì)算的準(zhǔn)確性;河段總間距增大,淤積量也增大,淤積量與斷面間距成正比關(guān)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.
【作者單位】： 黃河水利委員會三門峽庫區(qū)水文水資源局;三門峽黃河明珠(集團(tuán))有限公司;
【分類號】：TV147

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