渭河流域主要控制断面旱限流量确定

旱限流量是评估河流干旱等级的水文特征指标,是启动抗旱应急响应等级的重要依据,是做好抗旱水量应急调度的重要基础。依据水文断面下游主要取用水需求,分析计算各取水口取用水量,以取用水量与河道生态流量之和作为初值,综合确定旱限流量。通过对渭河流域主要控制断面旱限流量的分析研究,确定拓石、魏家堡、咸阳、临潼、华县的旱限流量分别为:16.0、11.0、10.0、50.0、12.0 m3/s,为科学合理判断水文干旱等级及进行抗旱指挥决策提供可靠依据。

Determination of limited drought flow in main controlsection of Weihe River basin

Drought limit flow is a hydrological characteristics index to evaluate river dry levels and an important basis to start the response level of drought emergency and to do a good job in drought water emergency scheduling.The paper calculated the intake discharge by analyzing the water demand of hydrological downstream cross section. Taking the sum of intake discharge and channel ecological discharge as the initial value, the drought limit discharge was comprehensively determined. Based on the analysis of drought limit flow in the main control section of Weihe River basin, the drought limit flows of tuoshi, Weijiabu,Xianyang,Litong,Huaxian are 6.0,1.0,0.0,0.0,2.0m³/s,the result can provide reliable basis for the scientific , reasonable judgment of hydrologic drought level and drought relief command decision.