塔里木河河床渗透系数及其渗漏水量分析

发布时间：2018-09-10 08:29

【摘要】：为明晰塔里木河的水文过程,实现水资源的优化配置,采用颗粒分析法,分析塔里木河上中游河床沉积物渗透系数的时空变化特点,并借助达西定律确定了不同来水情景下4个河段的渗漏水量。结果表明:1塔里木河河床沉积物土壤颗粒的粒径0.000 5~0.5 mm,砂类土的比重为83%,因此,Sauerbrei公式用于该河流河道渗透系数的计算。2河床沉积物渗透系数与水温的变化具有一致性,段2、段4、段1和段3的年均渗透系数分别为115.3m·d~(-1)、74.5 m·d~(-1)、71.4 m·d~(-1)、45.2 m·d~(-1),呈逐渐减小趋势。3在12.5%、50%和87.5%的3个来水频率下,河段耗水量、渗漏水量及单位河长渗漏水量均呈现递减趋势;上中游总渗漏水量分别为10.85×108m3、9.94×108m3、9.13×108m3,水量渗漏集中在5—10月。4在同一来水频率下,河段渗漏水量依次为:段1段4段2段3,而单位河长渗漏水量为:段1段4段3段2。验证结果表明,渗漏水量计算结果与定量分离结果误差仅为2%,故渗漏水量及渗透系数计算结果合理。该研究可为实现塔里木河生态引水工程的合理布局和生态保护提供科学依据和技术支撑。
[Abstract]:In order to clarify the hydrological process of the Tarim River and to realize the optimal allocation of water resources, the temporal and spatial variation characteristics of the sediment permeability coefficient in the upper and middle reaches of the Tarim River were analyzed by the particle analysis method. According to Darcy's law, the leakage water of four reaches under different water coming scenarios is determined. The results show that the specific gravity of the sediment particles in the sediment of the Tarim River bed is 833.Therefore, the calculation of the permeability coefficient of the river channel by Sauerbrei formula is consistent with the variation of the water temperature. The average annual permeability coefficients of stage 2, stage 4, stage 1 and section 3 are 115.3 m d-1 and 74.5 m d-1, respectively, showing a decreasing trend of water consumption, leakage and leakage per unit length of river at the frequencies of 12.5% and 87.5%, respectively. The total leakage water in the upper and middle reaches is 10.85 脳 10 ~ 8m ~ (3) ~ 9.94 脳 10 ~ (8) m ~ (3) and 9.13 脳 10 ~ (8) m ~ (3) respectively. Under the same frequency of water coming from May to October, the leakage water volume of the upper and middle reaches is as follows: section 1, section 4, section 2, and section 1, section 4, section 3, and the unit river's long leakage is as follows: section 1, section 4, section 3, and section 2. The results show that the error between the calculation results of leakage water and quantitative separation is only 2, so the calculation results of leakage water and permeability coefficient are reasonable. The research can provide scientific basis and technical support for the rational layout and ecological protection of ecological diversion project of Tarim River.
【作者单位】：新疆农业大学林学与园艺学院;中国科学院新疆生态与地理研究所;
【基金】：国家自然科学基金项目(41471099,41171427,31370551,31400466) 中国科学院“西部之光”人才培养计划项目(XBBS-2014-13)
【分类号】：P333

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