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Open Journal of Modern Hydrology 2016年第4期6卷 222-229页

作者： Hamidu Hassan Sidi Muhammad Waru Garga Ali Bukar Kana Muhammad Abdullahi Department of Geology Usmanu Danfodiyo University Sokoto Nigeria Department of Geology University of Maiduguri Maiduguri Nigeria Department of Civil and Water Resources Engineering University of Maiduguri Maiduguri Nigeria Department of Geology Ahmadu Bello University Samaru Zaria Nigeria

Aquifers derived from the crystalline basement rocks for parts of Sanga Local Government area of Kaduna State, Nigeria consist of clay, silt, sand, gravel and laterite materials which may be in various proportions. Using Cooper-Jacobs non-equilibrium graphical method, the hydraulic properties were estimated from pumping test data of 18 boreholes. Conductivity varies from 1.02 × 10﹣2 m/s to 4.07 × 10﹣2 m/s and transmissivity varies from 1.14 × 10﹣1 m2/s to 4.40 × 10﹣1 m2/s. The values of specific capacity range between 1.03 × 10﹣1 m2/s/m and 9.00 × 10﹣2 m2/s/m, and these values indicate that the aquifers in the area have low to moderate ground water potentials. The low yield range of between 0.45 l/s and 1.00 l/s recorded in the area shows the heterogeneous and anisotropy nature of the basement aquifer system in terms of groundwater discharge. On the average, the boreholes assessed have potentials to sustain local to regional supply provided the best drilling method and materials are used and well completion properly done.

关键词： pumping test Heterogeneous Anisotropy Conductivity Discharge Sanga

Comparison between Neuman(1975) and Jacob(1946) application for analysing pumping test data of unconfined aquifer

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Journal of Groundwater Science and Engineering 2016年第3期4卷 165-173页

作者： Dana Mawlood Jwan Mustafa Civil Engineering Department College of Engineering University of Salahaddin General Directorate of Dams and Reservoirs Ministry of Agricultural and Water Resources

pumping test of a water table aquifer is carried out to estimate the aquifer parameters, the obtained data were analysed through the solution of both Neuman(1975) and Jacob(1946) methods through AQTESOLV and Spreadsheet programs, the results of each methods are compared to evaluate the applicability and accuracy of the solution theoretically and practically. In the paper an example is presented, which is conducted for a constant rate pumping test from Ohio, in Fairborn(near Dayton), and it supplied by S.E. Norris(U.S. Geological Survey, Columbus, Ohio). The main objective of this study is to introduce both program and the way of the applications, and compare the results and the hand on of both programs in the field.

关键词： Neuman(1975) Unconfined aquifer pumping test AQTESOLV program Microsoft Excel(Spreadsheet) program

Application of Modflow in Hydrological Parameters Calculation in pumping test of Large Base Dewatering Projects

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Application of Modflow in Hydrological Parameters Calculatio...

Estimation of hydraulic parameters from pumping tests in a multiaquifer system

第十届全国渗流力学学术会议暨2009渗流力学及应用国际论坛

作者： FANG Zhang,XIAO Chang-lai,MA Zhe College of Environment and Resources,Jilin University,Changchun,130026

In the process of hydrgeological parameters calculation in large base dewatering projects, hydrogelogical parameters of aquifers are calculated according to pumping *** reasonable groundwater calculation model of a dewatering project in Hongyi digital square is built by the software *** to observed water level data,the parameters are modified several times to make sure that the modeling groundwater flow field fits the actual *** doing that we get the hydrological parameters which are closer to actual *** yield of water per square from the groundwork is *** parameters provide significant basis for calculation of groundwork yielding,structure design and construction measures.

关键词： pumping test parameters of aquifer modeling parameters modification

来源： cnki会议评论

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Underground Space 2020年第3期5卷 210-222页

作者： Da Ha Gang Zheng Haizuo Zhou Chaofeng Zeng Huihui Zhang School of Civil Engineering Tianjin UniversityTianjin 300072China Key Laboratory of Coast Civil Structure Safety of Ministry of Education Tianjin UniversityTianjin 300072China Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring School of Civil EngineeringHunan University of Science and TechnologyXiangtanHunan 411201China School of Resources and Environmental Sciences Wuhan UniversityWuhan 430079China

The hydrogeologic conditions in Tianjin,China,are characterized by a system of multiple alternating aquifers and aquitards and a high groundwater ***,the groundwater system to a depth of 70 m includes one phreatic aquifer and three semiconfined aquifers(AqI–AqIII).The distribution of aquifers varies *** estimates of aquifer parameters from pumping tests are essential in geotechnical engineering *** this study,the applicability of different models for estimating hydraulic parameters in a multiaquifer system is *** avoid errors in the graphic-analytical process and to enhance the efficiency and accuracy,a hybrid algorithm,called GALMA(a genetic algorithm(GA)combined with the Levenberg–Marquardt(LM)algorithm),is used with the Neuman and Witherspoon model and ratio *** estimated values in the second and third semiconfined aquifers(AqII and AqIII)from various solutions are compared with the measured *** validations based on the prediction of the drawdown values are performed via a three dimensional numerical simulation.

关键词： Hydraulic parameter Leaky aquifer pumping test Optimal approach

The influence of low-permeability cap on capillary pressure during pumping in unconfined aquifer

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Journal of Hydrodynamics 2013年第6期25卷 867-870页

作者：黄辉钱家忠匡星星陈冰宇马雷吴亚楠 School of Resources and Environmental Engineering Hefei University of Technology Department of Earth Sciences The University of Hong Kong

The pumping test in an unconfined aquifer with and without a low-permeability soil was studied experimentally to reveal the influence of the negative air pressure （NP） caused by the upper layer on the water content （w）, the water pressure （Pw）, as well as on the capillary pressure （Pc）. The study demonstrates that the NP generated in the vadose zone during pumping in the capper aquifer has a significant influence on w, Pw and Pc The Pc obtained from the capped aquifer is smaller than that without the upper layer. After the NP reaches a peak, the influence of the NP on Pc. is gradually declined as the air inflows through the upper layer which makes the NP gradually return to zero. When the air pressure returns to the atmospheric pressure, Pc in the vadose zone is only correlated with Pw, the same as the case with no upper layer.

关键词： low-permeability soil water content water pressure capillary pressure vadose zone pumping test

Advantages of employing multilevel monitoring wells for design of tunnels subjected to multi-aquifer alluvial

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Journal of Mountain Science 2021年第1期18卷 219-232页

作者： Mohsen GOLIAN Ebrahim SHARIFI TESHNIZI Hamed TAVASOLI ROSTAMI Homayoon KATIBEH Mario PARISE Masoud MAHDAD Habib SAADAT Mehdi ABBASI Mahshid EBAD ARDESTANI Tehran Science and Research Branch Islamic Azad UniversityTehran ***Iran Department of Geology Faculty of SciencesFerdowsi UniversityMashhad 917751436Iran Mining and Metallurgical Engineering Department Amirkabir University of Technology(Tehran Polytechnic)Tehran ***Iran Earth and Environmental Sciences Department University Aldo MoroBari 70121Italy Iran University of Science and Technology Tehran ***Iran Shiraz University Shiraz ***Iran

For tunnels being excavated through multiple knowledge of the aquifers’hydraulic head becomes essential for determining groundwater inflow into the tunnel and analyzing its stability,specifically using multilevel monitoring *** the multi-aquifer alluvial section of the Glas tunnel(Iran),since the hydraulic head calculations were based on the data obtained from single-piezometer boreholes,the excavation risk was assessed to be at high level and the tunnel seemed to be unstable,thus an incorrect conclusion was derived from the misleading *** take cost mitigation measures into account,it was necessary to calculate the hydraulic head at tunnel level *** installing nested and clustered wells the mean hydraulic head was measured to be 70 m,significantly different from the 90 m previously determined by *** the updated value,the groundwater inflow and bulkhead load,formerly calculated as 0.65 m^(3)/s and 9.5 bars,were determined to be 0.49 m^(3)/s and 7.5 bars,respectively.

关键词： Nested wells Clustered wells Hydraulic head pumping test Mechanized tunneling Iran

Numerical evaluation of the ground response induced by dewatering in a multi-aquifer system

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Geoscience Frontiers 2021年第5期12卷 384-396页

作者： Yong-Xia Wu Qian Zheng Annan Zhou Shui-Long Shen College of Mechanical and Automotive Engineering Shanghai University of Engineering ScienceShanghai 201620China Department of Civil and Environmental Engineering College of EngineeringShantou UniversityShantouGuangdong 515063China Civil and Infrastructure Engineering School of EngineeringRoyal Melbourne Institute of Technology(RMIT)Victoria 3001Australia MOE Key Laboratory of Intelligent Manufacturing Technology College of EngineeringShantou UniversityShantouGuangdong 515063China

This study presents a numerical investigation of dewatering-induced settlement and wall deflection during pumping tests in Tianjin,*** on the measured groundwater head and building settlement during the pumping test,a three-dimensional liquid-solid coupling model is established by using the finite element method(FEM).The void ratio,hydraulic conductivity,and elastic modulus of each layer are back-calculated through the numerical *** groundwater drawdown,seepage field,ground settlement,horizontal ground displacement,and diaphragm wall lateral deflection are analyzed using the FEM *** simulated results demonstrate that(i)the maximum ground settlement outside of the excavation reaches to 82 mm due to the leakage effect of aquitards;(ii)large horizontal displacement occurs in the soil during the pumping test with a maximum value of 28.3 mm,and the installation of the diaphragm wall in the aquifer can reduce the horizontal displacement of the ground;(iii)long-term pumping causes a large lateral deflection of the diaphragm wall,and a maximum value of 23.2 mm occurs at the layer where the screens of the wells are located;and(iv)long-term large-scale pumping should be avoided before excavation.

关键词： Excavation pit pumping test Settlement Wall deflection Numerical simulation

Experimental Study on Calculation of Hydro-Geological Parameters for Unsteady Flow

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Transactions of Tianjin University 2013年第5期19卷 351-355页

作者：熊春宝陈雯叶作安 School of Civil Engineering Tianjin University Key Laboratory of Coastal Civil Engineering Structure and Safety (Tianjin University) Ministry of Education Tianjin Surveying and Hydrography Co. Ltd

After the linear analytical method of unsteady flow theory is further improved,an innovative and faster algorithm is *** water storage in a confined aquifer is derived from the water transmissivity coefficient and the water-pressure conductivity *** water transmissivity coefficient is approximated by a Taylorseries expansion of drawdown,and the water-pressure conductivity coefficient is obtained by the average *** this algorithm,the distance of the observation points from the pumping well must be *** the distance is as short as the radius of the main pumping well,the data of the drawdown difference between the sidewall and the center of pumping well are difficult to measure,but the same results can be achieved based on the assumption that the drawdown difference approximates to the drawdown of the observation wells at a radial distance from the pumping well according to the *** the help of charts,this algorithm is more concise and efficient,which has been verified by the test of water pumping project in Tianjin Binhai International Airport.

关键词： pumping test unsteady flow theory improved linear analytical method hydro-geological parameter

On-site tests to estimate aquifer permeability of drainage area of south caisson anchorage construction of Taizhou Bridge

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Engineering Sciences 2011年第2期9卷 20-25页

作者： Feng Zhaoxiang Zhao Yanrong Jiangsu Provincial Yangtze River Highway Bridge Construction Commanding Department （JPCD） Taizhou Jiangsu 225321 China School of Earth Sciences and Engineering Hohai University Nanjing 210098 China

During the construction of the south caisson anchorage of Taizhou Bridge, the drainage area is located in the lower reaches of the Yangtze River and the permeability of stratums there is considerable. In order to maintain progress and guarantee safety during the sinking of the caisson, water should be drained in the initial period. Subsequently, detailed information about the aquifer permeability is required to make sure that the drainage will proceed successfully, which consequently necessitates the on-site estimation of the aquifer permeability in the drainage area. Therefore, the traditional pumping test and slug test are implemented respectively on site. The comparison of computational results of these two tests indicates that they are consistent overall. Notwithstanding, as slug test can be conducted with portable facilities in a short time and the manipulation is easy and few people need to be involved, the advantages of slug test is conspicuous compared with the traditional pumping test. It could be speculated that slug test will gain a prevalent application in the measurement of aquifer permeability in the future.

关键词： Taizhou Bridge south-anchor caisson pumping test slug test

Identification of Aquifer Properties in the Eastern Part of Kushtia District, Bangladesh

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Journal of Geoscience and Environment Protection 2020年第11期8卷 222-237页

作者： Md. Shahinuzzaman M. Nozibul Haque Khan M. Nasir Uddin M. Alibuddin Department of Electrical and Electronic Engineering Islamic University Kushtia Bangladesh Department of Physics Meherpur Paura Degree College Meherpur Bangladesh

The present study has been undertaken to depict spatial distribution of different aquifer parameters in the eastern part of Kushtia district through a detailed hydrogeological survey. For this investigation, 119 lithologs and 92 pumping test data have been used. These data have been processed, analyzed, interpreted and krigged for the spatial assessment of the aquifer properties viz. transmissivity, hydraulic conductivity, hydraulic diffusivity, specific yield, radius of influence, and specific drawdown. It is seen from the investigation that the transmissivity and hydraulic conductivity values obtained from the pumping tests of the wells are varying from 1811 m2/day to 2568 m2/day and 32.5 m/day and 61.5 m/day respectively, the hydraulic diffusivity being ranging from 181,143 m2/day to 256,788 m2/day. The estimated specific yield of 17.97% - 23.46% supports that the area is dominated with coarse grained sands. This study reveals that the distribution of deep tube wells in the area are not within the radius of influence (638 - 760 m) each other, but few shallow and hand tube wells existed within the radius of influence. The estimated specific draw down is varying from 57 m/cumec to 126.1 m/cumec. From the overall analysis, it is found that the area is favorable for groundwater exploration.

关键词： Groundwater Aquifer pumping test Transmissivity Hydraulic Conductivity Hydraulic Diffusivity Specific Yield Radius of Influence Specific Yield