检索结果-南通市图书馆

Evaluating the characteristics of geological structures in karst groundwater inflow, Nowsud Tunnel

Journal of Mountain Science 2024年第10期21卷 3434-3452页

作者： BAYAT Narges SADEGHI Erfan nassery hamid reza Department of Minerals and Groundwater Resources Faculty of Earth SciencesShahid Beheshti UniversityEvin AveTehran ***Iran Ministry of Energy Kordestan ExpyTehran ***Iran

Highly permeable geological structures such as dissolution channels, open fractures, and faults create environmental challenges regard to hydrological and hydrogeological aspects of underground construction, often causing significant groundwater inflow during drilling due to the limitations of empirical and analytical methods. This study aims to identify the geological factors influencing water flow into the tunnel. High-flow zones' geological features have been identified and examined for this purpose. According to the geological complexity of the Nowsud tunnel, presence of different formations with different permeability and karstification have led to a high volume of underground inflow water (up to 4700 L/s) to the tunnel. The Nowsud tunnel faces significant geological and hydrogeological challenges due to its passage through the Ilam formation's LI2 unit, characterized by dissolution channels, faults, and fractures. The highest inflow rate (4700 L/s) occurred in the Hz-9 zone within the Zimkan anticline. The relationship between geological features and groundwater inflow indicates that anticlines are more susceptible to inflow than synclines. Additionally, different types of faults exhibit varying hydraulic effects, with strike-slip faults having the most significant impact on groundwater inflow, thrust faults conducting less water into the tunnel, and inflow through normal faults being negligible compared to the other two types of faults. The novelty of this paper lies in its detailed analysis of geological features influencing groundwater inflow into the Nowsud tunnel, providing empirical data on high-flow zones and differentiating the hydraulic effects of various fault types, which enhances the understanding and prediction of groundwater inflow in underground constructions.

关键词： Geological structures Groundwater inflow Hydrogeology Nowsud tunnel Karst

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hydrogeological Framework and Groundwater Balance of a Semi-arid Aquifer, a Case Study from Iran

引用

Journal of Water Resource and Protection 2011年第7期3卷 513-521页

作者： Leila Khodapanah Wan Nor Azmin Sulaiman hamid reza nassery 不详

Climate changing and associated factors combined with considerably increases in water demand have been accompanied by severe depletion of reservoir storage of the most groundwater supplies of Iran. Shahriar aquifer in west of Tehran is a representative aquifer of these kinds. In order to meet water demand of the area and protecting groundwater from quantity and quality deterioration, precision recognition of geology, hydrologic and hydrogeologic characteristics of the aquifer is first step. The basic objective of this study is to develop the hydrogeological framework of the groundwater system in Shariar, Iran and to estimate groundwater balance as a scientific database for future water resources delevopment programs. Based on this research lateral groundwater inflows, direct infiltration of rainfall, stream bed infiltration, irrigation return and surplus drinking and industrial water are the recharging factors of the aquifer. Subsurface outflows, domestic and industrial pumping wells and agricultural abstraction are the main parameters discharge the aquifer system. Water balance in the Shahriar aquifer system is in disequilibrium and a deficit of about 24.7 million cubic meters exists.

关键词： Groundwater Balance Hydrogeology Alluvial Aquifer Semi-Arid Basin Iran

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Use of Cl/Br Ratio to Determine Salinity Source of Groundwater:Lenjanat Plain,Isfahan,Iran

Use of Cl/Br Ratio to Determine Salinity Source of Groundwat...

引用

2012年环境污染与大众健康学术会议

作者： hamid reza nassery Zahra Kayhomayoon Faculty of Earth Sciences Shahid Beheshti UniversityTehranIran

ISBN: (纸本)9781618960108

Ratio of conservative ions Cl/Br has been used to identify source of groundwater salinity in Lenjanat plain. For this purpose, groundwater was seasonally sampled. The results of field and laboratory measurements show that Chloride ion as an indicator of groundwater salinity, highly correlated with EC and elements Mg Ca Br and Sr. Concentration of chloride a gradually increase through groundwater flow direction of the borders （17.73 mgl -1 ） towards the middle parts （ 3475 mgl -1 ） of the plain. The trend of Br concentration changes is similar with Cl. Mass ratios of conservative elements Cl/Br for groundwater samples in Lenjanat plain is 329 in borders to 4492 in center of plain. Certain ratios and saturation index with geochemical graphs indicate that the dissolution of evaporation deposits （halite and gypsum） and cation exchange are the most important processes affecting the chemical composition of groundwater. According to these results, the data obtained from the ratio of Cl/Br in Lenjanat groundwater samples, confirms the reported Cl/Br ratio for ground-water affecting by the dissolution of evaporation deposits and overlap with range of Cl/Br ratio for domestic sewage effluent groundwater.

关键词： Groundwater salinity Cl/Br ratio Lenjanat plain

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：