河南省平原区潜水含水层给水度分区研究  

Study on the Demarcation of Specific Yield Distribution of the Plain Terrain Phreatic Water Aquifer in Henan

作　　者：李洋 景兆凯[2] 杨明华 夏飞雪[2] 王盼盼[2] 于丽 李莹 LI Yang;JING Zhaokai;YANG Minghua;XIA Feixue;WANG Panpan;YU Li;LI Ying(Henan Bureau of Hydrology and Water Resources,Zhengzhou 450003,China;Second Geological Environment Investigation Institute of Henan Geological and Mining Bureau,Zhengzhou 450053,China)

机构地区：[1]河南省水文水资源局,河南郑州450003 [2]河南省地矿局第二地质环境调查院,河南郑州450053

出　　处：《华北水利水电大学学报（自然科学版）》2022年第4期67-75,共9页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：国家自然科学基金项目(41902283)。

摘　　要：给水度是土壤释水性的一个重要指标,对浅层地下水资源评价等具有重要影响。给水度受地下水位波动等因素影响可能会出现一定变化,2002年开展的第二次河南省水资源调查评价(以下简称二次评价)中的给水度分区的相关成果已不能准确反映当前实际情况,为此有必要对河南省平原区潜水含水层给水度分区进一步复核修正。采用现场非稳定流抽水试验法、室内筒测法、动态法等对河南省潜水含水层不同岩性的当前给水度进行测定分析,结合近期关于研究区给水度相关研究的大量成果,对河南省平原区包气带不同岩性给水度进行分区。结果表明:现场非稳定流抽水试验测定的给水度存在离散现象,室内筒测法及动态法测定分析的给水度结果较为稳定;本研究测定的给水度结果较二次评价中的给水度结果大;综合确定粉质黏土区的给水度为0.030~0.045、粉土区的给水度为0.040~0.060、粉砂区的给水度为0.060~0.080、细砂区的给水度为0.080~0.100;绘制了研究区给水度分区图,给水度在0.022~0.084范围的区域面积占研究区总面积的87.5%;研究区以粉土、粉质黏土为主。该分区结果对相关研究具有一定参考价值。Specific yield is a key index on water release capability of soil,which plays an important role in the evaluation of shallow groundwater resources.It may change with time due to underground water level and other factors.The results of demarcation of specific yield distribution in the second water resources investigation and evaluation of Henan carried out in 2002 cannot accurately reflect the current actual situation,so it is necessary to further review and revise the demarcation of specific yield distribution in the plain terrain phreatic water aquifer of Henan.In-situ unsteady flow pumping test,laborato-ry cylinder measurement method and statistical dynamic analysis were used to test and analyze the specific yield for different lithological soils.Lots of results about specific yield in this study area from other researches were also used for references for demarcation of specific yield distribution.The results show that:the specific yields from in-situ unsteady flow pumping test were discreteness,however,the results from laboratory cylinder measurement method and statistical dynamic analysis were relative stable.The comprehensive results from these tests were larger than the results from the second water resources assessment.The specific yields were 0.030~0.045 for silty clay zone,0.040~0.060 for silt zone,0.060~0.080 for silty sand zone,and 0.080~0.100 for fine sand zone.The demarcation of specific yield distribution was proposed,the area of specific yield of 0.022~0.084 accounted for 87.5%of total research area,the lithological soil types were mainly silty and silty clay.The research results provide good references for related researches.

关 键 词：平原区 给水度分区 潜水含水层 土质类型 

分 类 号：P641[天文地球—地质矿产勘探]