Groundwater最新文献_第10页

NGWA News NGWA新闻。

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-07-03 DOI: 10.1111/gwat.13330

引用次数: 0

Study on Permeability Calculation Method Based on J Function and Fractal Theory 基于 J 函数和分形理论的渗透率计算方法研究

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-07-01 DOI: 10.1111/gwat.13339

Guangteng Lu, Fengpeng Lai, Bince Li

{"title":"Study on Permeability Calculation Method Based on J Function and Fractal Theory","authors":"Guangteng Lu, Fengpeng Lai, Bince Li","doi":"10.1111/gwat.13339","DOIUrl":"10.1111/gwat.13339","url":null,"abstract":"Permeability is a required parameter for studying aquifer properties. However, for sandstone aquifers with low permeability, it is difficult to measure permeability directly through experiments. Based on fractal theory and the J function, a new method to calculate the permeability of a sandstone aquifer is derived. This work first solves the J function under each water saturation according to its definition. Combined with mercury pressure data, the J function and logarithmic curve equation of water saturation are then fitted by the drawing method, and the fractal dimension and tortuosity of the aquifer are further solved. Finally, the aquifer's permeability is calculated using the new permeability calculation method. To verify the accuracy of the proposed method, 15 rock samples from the Chang 7 Group, Ordos Basin, are taken as research objects. The permeability is calculated using the new method combined with mercury injection data and aquifer characteristic parameters, and the results are compared with the real permeability. The relative error of most samples is <20%, which shows the permeability calculated by this method is accurate and reliable. The effects of fractal dimension, tortuosity, and porosity on permeability are also analyzed.","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 2","pages":"276-284"},"PeriodicalIF":2.6,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9764525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automated Estimation of Aquifer Parameters from Arbitrary-Rate Pumping Tests in Python and MATLAB 用 Python 和 MATLAB 自动估算任意速率抽水试验的含水层参数。

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-07-01 DOI: 10.1111/gwat.13338

David A. Benson

{"title":"Automated Estimation of Aquifer Parameters from Arbitrary-Rate Pumping Tests in Python and MATLAB","authors":"David A. Benson","doi":"10.1111/gwat.13338","DOIUrl":"10.1111/gwat.13338","url":null,"abstract":"Inspired by the analysis by Mishra et al. (2012) of variable pumping rate tests using piecewise-linear reconstructions of the pumping history, this article contains a derivation of the convolutional form of pumping tests in which the pumping history may take any possible form. The solution is very similar to the classical Theis (1935) equation but uses the Green's function for a pumped aquifer given by taking the time derivative of the well function <math>\u0000 <mrow>\u0000 <mi>W</mi>\u0000 <mrow>\u0000 <mo>(</mo>\u0000 <mrow>\u0000 <mi>u</mi>\u0000 <mrow>\u0000 <mo>(</mo>\u0000 <mi>t</mi>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 </mrow>\u0000 <mo>)</mo>\u0000 </mrow>\u0000 </mrow></math>. This eliminates one integration inside another and renders the convolution including the pumping history about as computationally demanding as calculating the well function alone, so that the convolution can be completed using handy mathematical software. It also allows nonlinear well losses, and because an easily-computed deterministic model exists for all data points and pumping history, an objective function may include all data, so that errors are reduced in calculating any nonlinear-well losses. In addition, data from multiple observation wells may be used simultaneously in the inversion. We provide codes in MATLAB and Python to solve for drawdown resulting from an arbitrary pumping history and compute the optimal aquifer parameters to fit the data. We find that the subtleties in parameter dependencies and constructing an appropriate objective function have a substantial effect on the interpreted parameters. Furthermore, the optimization from step-drawdown tests is typically nonunique and strongly suggests that a Bayesian inversion should be used to fully estimate the joint probability density of the parameter vector.","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 2","pages":"285-294"},"PeriodicalIF":2.6,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9755415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Community Cloud Computing Infrastructure to Support Equitable Water Research and Education 社区云计算基础设施支持公平的水资源研究和教育

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-06-26 DOI: 10.1111/gwat.13337

Anthony M. Castronova, Ayman Nassar, Wouter Knoben, Michael N. Fienen, Louise Arnal, Martyn Clark

引用次数: 0

Threats to Springs in a Changing World: Science and Policies for Protection 不断变化的世界对春天的威胁：保护科学与政策

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-06-22 DOI: 10.1111/gwat.13334

Susan Swanson

引用次数: 1

Estimating Groundwater Pumping for Irrigation: A Method Comparison 灌溉用地下水抽水量估算：方法比较。

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-06-22 DOI: 10.1111/gwat.13336

Andrea E. Brookfield, Samuel Zipper, Anthony D. Kendall, Hoori Ajami, Jillian M. Deines

{"title":"Estimating Groundwater Pumping for Irrigation: A Method Comparison","authors":"Andrea E. Brookfield, Samuel Zipper, Anthony D. Kendall, Hoori Ajami, Jillian M. Deines","doi":"10.1111/gwat.13336","DOIUrl":"10.1111/gwat.13336","url":null,"abstract":"Effective groundwater management is critical to future environmental, ecological, and social sustainability and requires accurate estimates of groundwater withdrawals. Unfortunately, these estimates are not readily available in most areas due to physical, regulatory, and social challenges. Here, we compare four different approaches for estimating groundwater withdrawals for agricultural irrigation. We apply these methods in a groundwater-irrigated region in the state of Kansas, USA, where high-quality groundwater withdrawal data are available for evaluation. The four methods represent a broad spectrum of approaches: (1) the hydrologically-based Water Table Fluctuation method (WTFM); (2) the demand-based SALUS crop model; (3) estimates based on satellite-derived evapotranspiration (ET) data from OpenET; and (4) a landscape hydrology model which integrates hydrologic- and demand-based approaches. The applicability of each approach varies based on data availability, spatial and temporal resolution, and accuracy of predictions. In general, our results indicate that all approaches reasonably estimate groundwater withdrawals in our region, however, the type and amount of data required for accurate estimates and the computational requirements vary among approaches. For example, WTFM requires accurate groundwater levels, specific yield, and recharge data, whereas the SALUS crop model requires adequate information about crop type, land use, and weather. This variability highlights the difficulty in identifying what data, and how much, are necessary for a reasonable groundwater withdrawal estimate, and suggests that data availability should drive the choice of approach. Overall, our findings will help practitioners evaluate the strengths and weaknesses of different approaches and select the appropriate approach for their application.","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 1","pages":"15-33"},"PeriodicalIF":2.6,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwat.13336","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9726441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Milestones of Groundwater Management in China 中国地下水管理的里程碑

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-06-20 DOI: 10.1111/gwat.13335

Yaqiang Wei

{"title":"Milestones of Groundwater Management in China","authors":"Yaqiang Wei","doi":"10.1111/gwat.13335","DOIUrl":"10.1111/gwat.13335","url":null,"abstract":"Ancient Groundwater Utilization In 1973, archeologists discovered the earliest well in China so far at the Hemudu Neolithic Cultural Site in Zhejiang Province, China. The well has square wooden pile walls, and a square wooden frame is supported inside to prevent the pile walls from collapsing inward. The purpose of drilling wells is to provide people with drinking water since 5000–7000 years ago. The management of groundwater begins with its exploitation and utilization. Eight wells have been discovered in the archeological site of the Xizhou Dynasty in Zhangjiapo, Shaanxi Province, some are rectangular, others are oval, and more than 9 m deep. Such a dense group of wells was not only used for human and livestock drinking, but also for farmland irrigation. The Karez Well System in the Turpan area of Xinjiang appeared between 200 and 300 BC, and it has been used to irrigate farmland until recently in some areas of modern Xinjiang. In the early years of the Qing Dynasty, Shaanxi officials supervised the drilling of wells and irrigated fields; there were 150,000 wells in 1737. Achievements in Shaanxi, located in arid and semiarid regions, have greatly promoted the development of groundwater utilization in well irrigation. As people began to rely more on groundwater sources, they discovered that some wells contained water with high levels of salt content, making it unsuitable for drinking. This increase in halogen elements in the water was due to the natural element background value. In response, people began to extract salt from these wells, giving rise to the production of “well salt.” Zigong, located in the western Sichuan Basin, was particularly well-suited for this industry due to its high concentration of groundwater. As a result, it became","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"61 5","pages":"754-757"},"PeriodicalIF":2.6,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10174596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Unit-Concentration Method to Quantify Source Contribution 量化源贡献的单位浓度法。

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-06-15 DOI: 10.1111/gwat.13333

Vivek Bedekar, Christopher Neville, Matthew J. Tonkin, R. Douglas Bartlett, Paul Plato

引用次数: 0

Estimation of Aquifer Transmissivity From Analysis of Long-Term Monitoring With the Thiem Solution 利用 Thiem 解决方案从长期监测分析中估算含水层的渗透性。

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-06-08 DOI: 10.1111/gwat.13332

Joel C. Henry, Christopher J. Neville, Alyssa N. Olson

{"title":"Estimation of Aquifer Transmissivity From Analysis of Long-Term Monitoring With the Thiem Solution","authors":"Joel C. Henry, Christopher J. Neville, Alyssa N. Olson","doi":"10.1111/gwat.13332","DOIUrl":"10.1111/gwat.13332","url":null,"abstract":"The application of the Thiem equation to support the interpretation of comprehensive long-term monitoring datasets, made possible through modern datalogging technology, is presented as an alternative to constant-rate aquifer testing to obtain representative transmissivity estimates in settings where controlled hydraulic testing may be impractical. Water levels logged at regular intervals can be readily converted to average water levels over time periods corresponding to periods of known pumping rates. By regressing average water levels during multiple time periods of known but variable withdrawal rates, steady-state conditions can be approximated and Thiem's solution applied to estimate transmissivity, without performance of a constant-rate aquifer test. Although the application is limited to settings where changes in aquifer storage are negligible, by regressing long data sets to parse interferences the method may characterize aquifer conditions over a much wider radius than short-term, non-equilibrium tests. As with all aquifer testing, informed interpretation is critical to identifying and resolving aquifer heterogeneities and interferences.","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 2","pages":"295-302"},"PeriodicalIF":2.6,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10011035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CFPy—A Python Package for Pre- and Postprocessing of the Conduit Flow Process of MODFLOW 一个Python包，用于MODFLOW的管道流过程的预处理和后处理。

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-06-05 DOI: 10.1111/gwat.13331

Thomas Reimann, Max Gustav Rudolph, Leonard Grabow, Torsten Noffz

{"title":"CFPy—A Python Package for Pre- and Postprocessing of the Conduit Flow Process of MODFLOW","authors":"Thomas Reimann, Max Gustav Rudolph, Leonard Grabow, Torsten Noffz","doi":"10.1111/gwat.13331","DOIUrl":"10.1111/gwat.13331","url":null,"abstract":"The conduit flow process (CFP) for MODFLOW's groundwater flow model is an advanced approach for investigating complex groundwater systems, such as karst, with coupled discrete-continuum models. CFP represents laminar and turbulent flow in a discrete pipe network coupled to a matrix continuum. However, the preprocessing demand is comparatively high to generate the conduit network and is usually performed with graphical user interfaces. To overcome this limitation and allow a scalable, reproducible, and comprehensive workflow, existing and new routines were aggregated to a Python package named CFPy, to allow script-based modeling that harmonizes well with the available and widely used FloPy package. CFPy allows information about the location and geometry of the conduit network to be considered by user-specific approaches or by sophisticated methods such as stochastic conduit network generators. The latter allows the automatic generation of many model variants with differing conduit networks for advanced investigations like multi-model approaches in combination with automatic parameter estimation. Additional postprocessing routines provide powerful control and valuable insights for CFP applications. In this methods note, a general technical description of the approach is complemented with two examples that guide users and demonstrate the main capabilities of CFPy.","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"61 6","pages":"887-894"},"PeriodicalIF":2.6,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwat.13331","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9660332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0