摘要
灌渠在农业生产中具有重要作用,渠道引水灌溉是我国主要灌溉形式,引水过程势必会伴随引沙。以塔河灌区输水渠道为研究对象,分析灌渠挟沙水流泥沙输特性。利用Delft3D模型建立二维渠道泥沙输运数学模型,对渠道不同水位、流速、流量下的含沙量进行研究。计算结果表明,塔河灌区输水渠道涨落急流速平均误差小于0.14 m/s,流量峰值误差小于75 m^3/s;灌渠流态合理,含沙量计算误差小于0.02 kg/m^3;渠床冲淤误差为0.023 m,与测量值相差23%,该数学模型可以较好地反映灌渠挟沙水流泥沙输运情况。
Irrigation plays an important role in agricultural production, water diversion canal irriga-tion is the main form of irrigation, water diversion process will inevitably accompanied by sediment diversion. Using Tahe irrigation water channel as the research object, irrigation water sediment char-acteristics was analyzed. The Delft3 D model was used to establish a two-dimensional channel sedi-ment transport mathematical model. Under the different channels of water level, flow velocity and flow sediment were studied. Calculation results show that:in Tahe irrigation area water channel fluc-tuation and flow rate of urgency with an average error of less than 0. 14m/s, peak flow error is less than 75m3/s;reasonable irrigation regime, sediment calculation error is less than 0. 02kg/m3;canal bed scouring and silting error 0. 023m, and measured values differed by 23%. The mathematical model can be to better reflect the irrigation ditch sediment sand flow and sediment transport.
出处
《水利科技与经济》
2016年第6期51-54,共4页
Water Conservancy Science and Technology and Economy
