基于GCDC法的河间地块地下水浸没计算及预测  

Calculation and Prediction of Groundwater Immersion in Riverine Land Based on Groundwater-Connected Domain Calculation Method

作　　者：黄远金 甘建军[2] 刘成奕 万燎榕 许俊 郑文晓 HUANG Yuan-jin;GAN Jian-jun;LIU Cheng-yi;WAN Liao-rong;XU Jun;ZHEN Wen-xiao(China Railway Water Resources and Hydropower Planning and Design Group,Nanchang 330029,Jiangxi Province,China;Hydraulic Engineering Institute,Nanchang Institute of Technology,Nanchang 330099,Jiangxi Province,China;Jiangxi Water and Hydropower Construction Group Co.,Ltd,Nanchang 330030,Jiangxi Province,China)

机构地区：[1]中铁水利水电规划设计集团有限公司,江西南昌330029 [2]南昌工程学院水利工程学院,江西南昌330099 [3]江西省水利水电建设集团有限公司,江西南昌330030

出　　处：《中国农村水利水电》2024年第11期218-226,共9页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(42162025);中国中铁股份有限公司科技研究开发计划重大课题(2021-重大-08);中铁水利水电规划设计集团有限公司课题(地勘-2020ww-0019)。

摘　　要：为了提高复杂地质结构平原区水库浸没计算精度,提出一种新的河间地块地下水浸没计算方法。该方法的主要理念是,地下水浸没只能发生在上层为弱透水层,下层为中透水层的二元地质结构中,重点开发地下水连通域算法(GCDC)进行计算和预测。GCDC方法利用钻探数据和临界安全超高定义三维地质模型,融合地表土地利用类型DEM数据,构建拓扑关系进行地下水浸没的连通搜索。以赣江尾闾工程中支和北支之间的河地地块为例,对该方法的应用和效果进行了验证。结果表明,GCDC方法可以模拟平原区水库浸没的计算与预测,并可以在一系列条件表征不同水位条件的地下水浸没。同时,GCDC方法还可以划分的地下水浸没严重程度分区。总体上来讲,GCDC方法是有用的开展地下水浸没影响评价的工具,因为它具有较好的渗流理论的可靠性和数据输入的可操作性。To improve the accuracy of reservoir inundation calculation in plains with complex geological structures,a new method for calculating underground water inundation in inter-river blocks is proposed.The main concept of this method is to focus on the development of the Groundwater Connected Domain Calculation(GCDC)algorithm,which assumes that underground water inundation can only occur in binary geological structures where the upper layer is a weakly permeable layer and the lower layer is a moderately permeable layer.The GCDC method utilizes drilling data and critically safe ultra-high-definition three-dimensional geological models,integrates Digital Elevation Model(DEM)data of surface land use types,and constructs topological relationships for conducting connected searches of underground water inundation.Taking the river land blocks between the middle and north branches of the Gan River Weilu Project as an example,the application and effectiveness of this method are verified.The results indicate that the GCDC method can simulate the calculation and prediction of reservoir inundation in plains,and can characterize underground water inundation under a range of conditions with different water levels.Additionally,the GCDC method can also classify the severity of underground water inundation.Overall,the GCDC method is a useful tool for assessing the impact of underground water inundation,as it has good reliability in terms of permeation theory and operability in data input.

关 键 词：地下水浸没 河间地块 数据叠加法 GCDC法 预测评价 

分 类 号：P641[天文地球—地质矿产勘探]