黄河三角洲沉积环境和沉积物渗透系数的现场实验测定

Field measuring the hydraulic conductivity of different sediments in Yellow River Delta

在详细描述黄河三角洲的微地貌条件和沉积环境后,选择黄河故道、孤北水库和天然湿地作为研究对象,用竖管法对其沉积物的渗透系数进行现场实验测定。根据实验结果,黄河、水库和湿地底部沉积物的渗透系数分别为:0.0347 m/d、0.0098 m/d、0.022 m/d。其中,K黄河>K湿地>K水库,符合水体的沉积环境和水动力条件。本文的结果为进一步研究黄河三角洲地表水与地下水交换关系、计算生态需水量以及进行合理有效的水资源管理提供了必要和可靠的参数。

In this paper, the micro-geomorphology condition and depositing environment of Yellow River Delta（YRD） were described, then the verticalpipe method was used to measure the hydraulic conductivity of the sediments below the different types of surface water, including： Yellow River, reservoir and wetland. According to the test, the K of the sediments below Yellow River（YR） , reservoir and wetland are 0. 0347 m/d,0.0098 m/d,0. 022 m/d respectively. The results indicates KYR〉Kvet〉Krev, which were in good accordance with the hydrodynamic conditions and depositing environment. The hydraulic conductivity values which were calculated in this paper can provide a series of necessary and important parameter for further studies, such as water transfer between surface water and groundwater, ecological water demand and water resource management.