首页|湖底沉积物渗透系数空间变异性分析

湖底沉积物渗透系数空间变异性分析

扫码查看
原文链接
  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
湖底沉积物垂向渗透系数在研究地下水与湖水转化关系中起着重要作用.采用竖管法测定银川清水湖 24个试验点位的垂向渗透系数(Kv),结合颗粒分析和统计学方法分析其渗透系数的分布规律和空间变异性.为更准确地表述和分析研究区 Kv 的空间变异性,根据结果把研究区划为 A、B 两个分区.结果表明:Kv 值主要分布在 0.107～5.004 m/d范围内,总体呈正态分布,均值为 1.995 m/d,变异系数为 0.730,渗透性有中等程度的空间变异性;A区试验点 Kv 均值为 0.926 m/d,明显小于B区试验点的均值 3.063 m/d,且变异程度由 A区向 B区逐渐减小;除个别试验点外,有效粒径 d10 与界限粒径 d50 较大的试验点的 Kv 值相对较大,说明沉积物颗粒大小与分布情况是 Kv 值产生差异的关键因素之一;湖水与地下水的水文交互作用影响 Kv 值的大小.研究结论为清水湖湿地的湖水和地下水转换研究提供了较为科学的理论依据.
Spatial Variability Analysis of the Permeability Coefficient of Lake Sediments
The vertical permeability coefficient of lake bottom sediment plays an important role in the study of the relation-ship between groundwater and lake water transformation.The vertical permeability coefficient(Kv)of 24 experimental sites in Qingshui Lake in Yinchuan was measured using the vertical pipe method.The distribution and spatial variability of its permeability coefficient were analyzed by particle analysis and statistical method.In order to more accurately describe and analyze the spatial variability of Kv in the study area,the study was divided into two zones A and B according to the results.The results are as follows.The Kv value is mainly distributed in the range of 0.107～5.004 m/d.The overall distribution is normal,with a mean of 1.995 m/d and a coefficient of variation of 0.730.There is moderate spatial variability in permea-bility.The average Kv of the test site in zone A was 0.926 m/d,which was significantly lower than the average Kv of the test site in zone B was 3.063 m/d,and the variation degree gradually decreased from zone A to zone B.With the exception of a few test sites,the Kv values of the larger test points with effective particle size d10 and boundary particle size d50 are rel-atively large.This indicates that the size and distribution of sediment particles are one of the key factors contributing to the difference in Kv values.The hydrological interaction between lake water and groundwater affects the magnitude of Kv value.The research provides a scientific theoretical basis for the study of the conversion of lake water and groundwater in Qing-shuihu wetland.

vertical permeability coefficientspatial variationvertical pipe methodparticle analysis method

赵贵章、谢思敏、张勃、王琳、闫静波、李鸿源

展开 >

华北水利水电大学 地球科学与工程学院,河南 郑州 450046

黄河流域水资源高效利用省部共建协同创新中心,河南 郑州 450046

宁夏回族自治区水文环境地质调查院,宁夏 银川 750011

河南省自然资源监测和国土整治院河南省自然资源科技创新中心(地下水资源调查监测研究),河南 郑州 450016

展开 >

垂向渗透系数 空间变异性 竖管法 颗粒分析法

国家自然科学基金面上项目水文水资源与水利工程科学国家重点实验室"一带一路"水与可持续发展科技基金宁夏生态地质调查示范项目2019年度河南省自然资源厅科技项目

413722602021490511NXCZ20220201201937913

2024

10.19760/j.ncwu.zk.2024056

华北水利水电大学学报(自然科学版)
华北水利水电大学

华北水利水电大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.558
ISSN：1002-5634
年,卷(期)：2024.45(5)
  • 12